@article{ 
author = {CHANDLERH.W.,},  
title = {THERMAL SHOCK OF REFRACTORIES}, 
abstract ={Being brittle and having low thermal conductivity, refractories suffer damage and sometimes fail in service as a result of thermal shock. While the approach of those making fine-grained technical ceramics is to make their products sufficiently strong to withstand thermal stresses the refractory technologist is more cunning. He uses, often little known, devices to provide resistance to thermal shock that minimise but do not eliminate damage to the component. In this paper the basic equations of thermal conduction and elasticity are presented and followed by some immediate results that should guide the designer of components subject to severe thermal environments. The influence of size and shape of the refractory components is then discussed along with ways in which refractory producers can engineer the thermal and mechanical properties. In particular, the methods used to tailor fracture behavior to optimize the thermal shock resistance are treated in some detail.},  
Keywords = {Thermal shock, Mechanical properties, Refractories},
volume = {2},
Number = {2}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-38-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {NOJEHDEHYANH.,  and MOZTARZADEHF.,  and MIRZADEHHAMID,  and HESARAKIS.,  and KEYANPOUR-RADM.,},  
title = {THE EFFECT OF ADDITION OF NAHF2 ON PHYSICOCHEMICAL AND MECHANICAL PROPERTIES OF APATITE CEMENTS}, 
abstract ={The effect of addition of NaHF2 on the cement setting and the set mass has been studied as an initial step to determine how fluoride influences the characteristics of a calcium phosphate cement, consisting of tetracalcium phosphate [TTCP:Ca4 (PO4)2O] and dicalcium phosphate dihydrate [DCPD:CaHPO4.2H2O].NaHF2 [0-10% wt% of powder phase] has been dissolved in double distilled water and used as the liquid phase of the apatite cement (AC). Powder X-ray diffraction analysis and FTIR measurements revealed that fluoride was necessary in promoting the formation of the apatite phase. The setting time was decreased significantly by the addition of NaHF2from 0% to 6%, but increased resulted in the AC (8-10%). The set AC (2%) has the highest compressive strength and the lowest porosity.The dissolution rate of set AC in weak acid, pH 5.5, was decreased with the amount of added NaHF2 from 0% to 6% but increased in the set AC 8-10%.The formation of fluoroapatite in AC (6%) was provided the low solubility and good acid resistance which is necessary for dental application.SEM observation showed needle-like apatite crystal growth over particulate matrix surface, however the amount of non-reactive TTCP or DCPD particles decreased by the addition of NaHF2. The Ca/P ratio, which was determined by EDAX, increased significantly with the addition of NaHF2.},  
Keywords = {Calcium phosphate cement, Hydroxyapatite cement, Fluoroapatite cement, Dicalcium phosphate dehydrate (DCPD), Tetracalcium phosphate (TTCP), Sodium hydrogen fluoride (NaHF2)},
volume = {2},
Number = {2}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-37-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {EFTEKHARI-YEKTAB.,  and MARGHUSSIANV.K.,},  
title = {THE COMPARISON OF MECHANICAL PROPERTIES OF SINTERED ?. QUARTZ SOLID SOLUTION AND GAHNITE GLASS – CERAMICS IN ZNO-AL2O3-SIO2 SYSTEM}, 
abstract ={The effect of precipitation of ?.qss. and gahnite phases during heat treatment of glass frits in the ZnO-Al2O3-SiO2 system on the mechanical property of resulting glass-ceramic specimens were investigated. It was shown that gahnite glass-ceramics had higher bend strength and toughness values than ?.qss. ones. The results are attributed to the higher modulus of elasticity as well as higher thermal expansion coefficient of gahnite relative to the residual glass phase.},  
Keywords = {Mechanical properties, ?. qss., Gahnite, Glass,Ceramics},
volume = {2},
Number = {2}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-36-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {GHOBEITIHASABM.,  and SEYYEDEBRAHIMIS.A.,  and BADAEEA.,},  
title = {STUDY OF THE OPTIMUM CALCINATION TEMPERATURE FOR THE SYNTHESIS OF STRONTIUM HEXAFERRITE MAGNETIC CERAMIC NANOPOWDER BY A SOL-GEL AUTO-COMBUSTION METHOD IN THE PRESENCE OF CATIONIC SURFACTANT}, 
abstract ={In this research the sol-gel auto-combustion method was used to prepare strontium hexaferrite nanopowder. A solution of distilled water, ferric and strontium nitrates, citric acid, trimethylamine, and n-decyltrimethylammonium bromide cationic surfactant, was heated to form a viscous gel. The gel was heated and then ignited automatically. As-burnt powder was calcined at temperatures from 700 to 900?C in air to obtain SrO.6Fe2O3 phase. The influence of the calcination temperature on the phase composition of the products has been investigated. X-ray diffraction confirmed the formation of single-phase strontium hexaferrite nanopowder at temperature of 800?C.},  
Keywords = {Sol,gel auto,combustion, Strontium hexaferrite nanopowder, Cationic surfactant},
volume = {2},
Number = {2}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-35-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {DEHGHANMANSHADIA.,  and ZAREIHANZAKIA.,  and GOLMAHALLEHO.,},  
title = {AN INVESTIGATION TO BAINITE FORMATION MORPHOLOGIES IN NI-CR BEARING LOW CARBON STEELS THROUGH THERMOMECHANICAL PROCESSING}, 
abstract ={The presence of bainite in the microstructure of steels to obtain a proper combination of strength and toughness has always been desired. The previous works however have shown that the presence of preferred bainite morphologies in the microstructure of any steel would not be readily accessible. In addition, the appearance of different bainite morphologies in the microstructure of any steel is dictated by different factors including the steel initial microstructure, austenitization characteristics, thermomechanical processing parameters and so on. Accordingly, in the present work, the effect of prior austenite grain size and the amount of austenite hot deformation on the bainite formation characteristics were investigated in 0.12C-2.5 Ni-1.2Cr steels. The results indicated that the prior austenite grain size and the amount of deformation in the austenite no-recrystallization region resulted in significant changes of the bainite formation kinetics and morphology.},  
Keywords = {Bainite morphology, TMP, Low carbon steel, Ultra fine ferrite (UFF)},
volume = {2},
Number = {2}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-34-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {MORAKABATIM.,  and ARABIH.,  and MIRDAMADISH.,  and ABBASIS.M.,},  
title = {THE KINETIC OF PRECIPITATION REACTIONS IN A RAPIDLY AGED HIGH ALLOY HIGH STRENGTH STEEL}, 
abstract ={This study was launched to investigate the effects of heating rate and aging parameters on the kinetic of precipitation reactions in a high alloy high strength steel having Ni, Co, Mo and Ti. For this purpose, as quenched specimens were subjected to three types of aging methods with different heating rates. These methods consisted of aging in Pb bath, salt bath, and furnace at different aging cycles. The kinetic of precipitation in each method was studied by hardness measurements and was described adequately by the Johnson-mehl-Avrami equation. Remarkable increase in hardness and its rate is observed when the rate of heating increases. The substantial increase in hardness of the specimens aged rapidly in salt &#59;amp Pb baths, compared with those aged normally in furnace, seemed to be due to the formation of thermo elastic stresses during sudden expansion of the substance subjected to rapid heating. According to the results obtained in this research, increase in the Avrami constants, n &#59;amp k, and decrease in the start time of transformation, ts, are associated with heating rate increasing. Analysis of the observed and calculated data for hardness using Arrhenius equation, shows that for the same amount of volume fraction of precipitates, the activation energy of precipitates decreased for f=25 and 50%, while at f=90 % it increased by increasing heating rate.},  
Keywords = {Rapid Aging, Precipitation Kinetic, High Alloy Ni,Co,Mo,Ti Steel, Heating rate, HAHS},
volume = {2},
Number = {2}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-33-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {PAYDARM.H.,  and FADAEIR.,  and SHARIATM.H.,},  
title = {A STUDY ON SINTERING BEHAVIORS OF COPPER COATED SIC COMPOSITE POWDERS FABRICATED BY ELECTROLESS PLATING AND MECHANICAL PROPERTIES OF THE CONSOLIDATED COMPOSITES}, 
abstract ={Copper coated SiC powders having three different amounts of copper, in the range of 20-60 wt%, were prepared via electroless coating process. The produced composite powders were uniaxially cold compressed and sintered at different temperatures and times under protective atmosphere. It was found that composite Cu/SiC powders and a relatively dense copper matrix composite with a uniform distribution of SiC reinforcing particles imbedded in copper matrix can be fabricated via electroless coating method followed by conventional cold pressing and sintering process. The results also show that SiC particles have a poor wettability with copper and so liquid phase sintering of the Cu/SiC composite powders did not enhance densification of the samples. Regarding this fact, optimum sintering temperatures, which depends on copper content, was determined to be in the range of 1050-1080?C.},  
Keywords = {Electroless, Cu/SiC Composite, Sintering, Wettability},
volume = {2},
Number = {2}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-32-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {ANEZIRISC.G.,  and BORZOVD.,  and SCHMIDTG.,},  
title = {IMPROVED CARBON BONDED MGO MATERIALS AS SMART REFRACTORIES}, 
abstract ={Improved structures of MgO carbon bonded materials due to new binder systems and due to the application of electrical currents during operation have been achieved for advanced applications in the secondary metallurgy and during near net shape metal casting.},  
Keywords = {MgO carbon, Smart refractories, Phenolic resin binder},
volume = {2},
Number = {1}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-47-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {MEHRYABA.,  and ARABIH.,  and TAMIZIFARM.,  and SEYEDEINS.H.,  and RAZAZIM.A.,},  
title = {STUDY OF JOINING MECHANISM (S) IN BRASS/STEEL/BRASS SANDWICH MATERIALS PREPARED BY SCRATCH BRUSHING METHOD}, 
abstract ={In this research, the mechanism of joining three sheets of metals, i.e. brass-steel-brass, by cold roll welding process has been studied. For this purpose, the two surfaces of steel sheets were roughened with stainless steel wire brush by different amounts, then the brass sheets were put on both sides of the steel sheets, before they were subjected to cold roll process. During rolling, peaks of the asperities on the surfaces of the steel sheet were pressurized, i.e. deformed, much more than that of trough. Hence, more hardening due to formation of higher dislocation density in the peaks regions were detected in comparison to the trough regions. Therefore, due to the differences in the amounts of work hardening occurred during cold rolling in the peaks &#59;amp trough of the scratches and also due to the nature of the rough surfaces of the steel sheets, which causes the smooth surface of soft brass sheets laied over the rough surface of the steel sheet to be shappend according to the profile of the steel sheet scratches during cold rolling, mechanical locking occurred at the interface of brass &#59;amp steel sheets. In addition, while the extrusion of brass took place through cracks within the surface of hardend peaks and metal bonding occurred on the contact points of the brass sheet &#59;amp the vergin steel. Therefore, it seems two mechanisms were in operation is making a suitable joining between the sheets. One was a locking mechanism due to the roughness of the steel sheets &#59;amp the other was bonding mechanism due to the bonding between the peak points of the scratches &#59;ampsoft brass surface. The strength of the bonded points in the interface were later increased by annealing the composite, so that by annealing the samples within the 500-900°C range for aperiod of 1 1/2 hr the interface strength increase substantially. The results of peeling test indicated that the interface strength of the samples annealed at 700°C or more increased so much that the brass sheet toms during peeling &#59;amp the fracture did not pass through the interface.},  
Keywords = {Three,layer composite, Peak and trough, micropin, Lock, Atomic diffusion, Metal bonding, Joining mechanism},
volume = {2},
Number = {1}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-46-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {KHARAZIY.H.K.,  and DIVANDARIM.,},  
title = {MOLD FILLING BEHAVIOR OF DOUBLE GATING SYSTEM IN ALUMINUMLFC PROCESS}, 
abstract ={The mold-filling behavior in the casting of aluminum alloy (A413) using lost foam casting (LFC) was explored. The effects of gate numbers, type of gating and casting thickness on the filling behavior were evaluated. Although, unlike convectional casting process, the gating system showed little effect onfilling ability, casting thickness created a greater effect on the mold filling. In contrast with convectional casting process, the mold filling seems to be controlled by castinggeometry as a consequence of combined influence of heat and mass transfer. The melt used to enter from the first gate instead of last gate which is in contrast with convectional casting process.},  
Keywords = {Lost foam casting, Al,Si Alloy, Fluid flow, Mold filling, Gating system},
volume = {2},
Number = {1}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-45-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {DEHGHANIANC.,  and SAREMIM.,  and MOHAMMADISABETM.,},  
title = {INVESTIGATION INTO SYNERGISTIC EFFECT OF MOLYBDATE AND PHOSPHATE AS AN INHIBITOR FOR MILD STEEL CORROSION PREVENTION IN SIMULATED COOLING WATER}, 
abstract ={The synergistic behavior of molybdate and phosphate ions in mitigating the corrosion of mild steel in simulated cooling water was evaluated performing potentiodynamic polarization and impedance spectroscopy tests. Phosphate and molybdate showed a synergistic effect on corrosion inhibition of steel in simulated cooling water. The observed reduction in anodic and cathodic current densities could be the consequence of incorporation of both phosphate and molybdate ions in forming a protective layer on the surface. The charge transfer resistance of the protective layer formed on steel surface was much greater in presence of both ions in solution than that when each inhibitor used alone.},  
Keywords = {Corrosion, Corrosion inhibitor, Molybdate, Phosphate, Cooling systems},
volume = {2},
Number = {1}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-44-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {MIRFAKHRAEEB.,  and ESHRAGHIH.,  and SARPOULAKIH.,},  
title = {INFLUENCE OF MGO ADDITION ON MICROSTRUCTURE AND PROPERTIES OF REACTION SINTERED ALUMINIUM TITANATE}, 
abstract ={Effect of MgO addition on reaction sintering of aluminium titanate was investigated using equimolar Al2O3 and TiO2 after firing the samples at 1400 C for four hours. Results showed that MgO addition enhanced the sintering process by magnesium aluminates formation, which led to lower porosity and improved densification of the samples. Physical and mechanical properties showed that samples containing 5 wt% MgO was the optimum composition.},  
Keywords = {Aliminium titanite, Reaction sintering, Rutile},
volume = {2},
Number = {1}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-43-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {PAKSHIRM.,  and AMINIR.,},  
title = {CATHODIC PROTECTION OF STEEL REINFORCED CONCRETE BY CONDUCTIVE EPOXY PAINTS IN MARINE ENVIRONMENTS}, 
abstract ={Anodes are critical component of cathodic protection systems. As part of this effort, three different anodes were tested in a cathodic protection system that was designed and constructed to prevent further corrosion of reinforced concrete. This anodic system includes an electrically conductive coating composition applied in fluid form over an outer surface of the concrete mix. The composition further includes a predetermined amount of electrically conductive carbon material (coke, carbon black, graphite) uniformly distributed in the epoxy resin (as a binder) whereby the coating composition has a predetermined value of resistively. This investigation attempts to find the best type and optimum content of conductive carbon filler in poxy coating, to ensure optimal anode working parameters for marine environments (basically marine and sewer environments) and if any of the coating systems tested in this study excel over the other. In this study, electric and electrochemical parameters of three layer (with average coating thickness of 300µm) coke-epoxy, carbon black-epoxy and graphite-epoxy conducting paints (with different amount of filler) have been determined during long-term anodic polarization (70 days) in a seawater solution. During this test, on the basis of impedance measurements, the electrical resistances of these coatings have been calculated every 14 days. if conductive paints exhibit good electric and electrochemical stability, they will be attractive for cathodic protection of reinforced concrete.},  
Keywords = {Conductive coating, Epoxy, Reinforced concrete, impedance, Anodic polarization},
volume = {2},
Number = {1}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-42-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {YAHOSSEINIM.R.S.,  and SIMCHIA.,  and VARAHRAMN.,  and DAVAMIP.,},  
title = {MODELING OF RAPID SOLIDIFICATION PROCESS IN THE GAS ATOMIZATION OF MOLTEN METALS}, 
abstract ={In the present work, a model was proposed to predict the thermal history during rapid solidification (RS) of metal droplets in the gas atomization process. The classical theory of heterogeneous nucleation was based on Newtonian heat flow and enthalpy method. Solving the governing numerical equations by the finite difference method (FDM) gave up the opportunity of analyzing the temperature-time history of the droplets during cooling in the RS process. Here, cooling in the liquid state, nucleation and recalescence, segregated solidification, eutectic solidification and cooling in the solid state were considered. To verify the model, the gas atomization of Al-4.5% Cu alloy was studied and the results were compared with the Shukla's model [1]. Convincing agreement was obtained between the predicted undercoolings and the experimental results reported previously.},  
Keywords = {Gas atomization, Rapid solidification, Modeling, Simulation, Enthalpy method},
volume = {2},
Number = {1}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-41-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {ZHANGS.,},  
title = {HYDRATION BEHAVIOUR AND ANTIOXIDISING EFFECT OF ALUMINIUM POWDER ADDED TO OXIDE- AND CARBON-BASED CASTABLES}, 
abstract ={Hydration behavior and antioxidising effect of aluminium (AI) powder has been investigated. Bayerite Al (OH) 3 product layers formed on Al in pure water at 25-45°C were porous, so the hydration rate, although very slow at 25°C, increased rapidly with increasing temperature from 25 to 45°C. On further increasing temperature from 45 to 95°C, initial hydration rate increased, but changed little over long hydration periods due to formation of denser and more continuous product layers. At 100?C, due to rapid water-evaporation, hydration product layers (composed of Al (OH)3 and a small amount of boehmite AlO (OH) became detached from the Al surfaces, so offering less protection, so that the hydration rate of Al increased markedly. The presence of MgO or calcium aluminate cement (CAC) in water did not change the hydration product, but greatly accelerate the hydration rate of AI. Addition of even a small amount (e.g. 0.25 wt% of Al amount) of MgO or CAC to water accelerated significantly the hydration of Al, and with increasing level of MgO or CAC, the hydration extent increased markedly. Sol-gel Si02 coatings on Al were useful in improving the hydration resistance of Al, and did not have a negative effect on the behavior of Al as an antioxidant.},  
Keywords = {Hydration mechanism, Oxide carbon Refractories, Anti,oxidant},
volume = {2},
Number = {3}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-56-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {ESTILIM.,  and PAYDARM.H.,  and BAHROLOLOOMM.E.,},  
title = {INVESTIGATING DISPERSION AND RHEOLOGICAL BEHAVIOR OF IONICALLY STABILIZED AQUEOUS A-ALUMINA SUSPENSION}, 
abstract ={Dispersion and rheological behaviors of ionically stabilized aqueous alpha alumina suspensions were investigated in various pH values (3, 11) and solid volume fractions (4, 7, 10, 15) Vol% using sedimentation experiment as well as viscosity measurement. Interface separating porous-packed sediment from a relatively clear supernatant at pH 11 was measured over 20 hours with the aim of obtaining linearity range, initial settling velocity, final sediment height and suspension sensitivity factor, whilst it failed to be observed in the case of pH 3 for its turbid supernatant. Thus, the final sediment level instead of interface location was taken into consideration. For all solids loading, final sediment level in the case of pH 3 was smaller than those in pH 11. The interface was observed to be moving downward in a linear fashion, with the steady drive toward an equilibrium state, which was substantiated to be pH and solid loading dependent. As ? increased, linearity time changed in an ascending order. pH 11 suspensions showed good agreement with the well-known Richardson-Zaki equation and displayed dramatic variations in initial settling velocity, whilst it was not the case for pH 3 as understood generally by turbidity observations. In addition, pH and ? appeared to be more effective in giving stability to the suspending systems. On the other hand, rheological behaviors of these suspensions were taken into consideration for better indication of suspension stabilization degree in which suspension yield stress derived using viscosity values was focused. The results showed that ?y at pH 3 is much lower than that of at pH 11. This is a further indication of better dispersion at pH 3. It was also found that for all ? values, pH 3 suspensions were more stable than the flocculated pH 11 ones.},  
Keywords = {Alumina, Aqueous, Ionically stabilized, Rheology and Sedimentation},
volume = {2},
Number = {3}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-55-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {MOAYEDM.H.,},  
title = {DETERIORATION OF PITTING CORROSION OF 316 STAINLESS STEEL BY SENSITIZATION HEAT TREATMENT}, 
abstract ={In this research pitting Corrosion of a sensitized 316 stainless steel was investigated employing potentiodynamic, potentiostatic techniques. Sensitization process was carried out on as-received alloy by submitting the specimen in electric furnace set at 650°Cfor five hours and then the specimen was quenched 25°C water. Potentiodynamic polarization of as received and sensitized specimens in 1M H2SO4 solution at room temperature and 70°C clearly revealed that the sensitization process has caused a magnificent change on electrochemical behavior of the specimen by changing critical current density for passivation, passivation potential and passive current density. Optical microscopy examination of the specimen surface after oxalic acid electrochemical etching also showed the deterioration of grain boundary of sensitized specimen due to chromium carbide precipitation in compared to as-received one. Several anodic potentiodynamic polarization on rode shaped working electrodes prepared from as-received and sensitized specimen in 3.5% NaCl test solution proved an average ~220 mV drop in pitting potential due to sensitization. Anodic potentiostatic polarization at 400 and 200 mV above corrosion potential also demonstrate the deterioration of pitting resistance of alloy as a result of sensitization. Scanning electron microscopy examination of anodically polarized of sensitized specimen at 700mVprior and after oxalic acid etching revealed large stable pits with lacy cover and also openpits with deep crevice for etched specimens.},  
Keywords = {Pitting corrosion, Sensitization, 316 stainless steel, Potentiodynamic polarization, Potentiostatic polarization, Oxalic acid etching},
volume = {2},
Number = {3}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-54-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {SEDGHIA.,  and SHOKOUHFARA.,  and ESLAMIFARSANIR.,},  
title = {FABRICATION OF CARBON FIBERS FROM COMMERCIAL WET SPIN POLYACRYLONITRILE FIBERS}, 
abstract ={Carbon fibers are fabricated from different materials such as special polyacrylonitrile (PAN) fibers, cellulose fibers and pitch. But PAN fibers are recognized as the most widely used precursor for the present-day manufacture of carbon fibers. The process of fabrication carbon fibers from special PAN fibers is composed of two steps including oxidative stabilization at low temperature and carbonization at high temperatures in an inert atmosphere. Today carbon fibers are still expensive because of the high price of their raw material (special PAN fibers).This study focuses on making carbon fibers from commercial PAN fibers (low price PAN fibers used in textile industry). The results shows that in case of conducting complete stabilization process, it is possible to produce desirable carbon fibers from commercial PAN fibers. With some changes in conventional procedure of stabilization in terms of temperature and time of operation, the desirable conditions of complete stabilization are achieved.},  
Keywords = {Commercial PAN Fibers, Stabilization, Carbonization, Carbon Fibers},
volume = {2},
Number = {3}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-53-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {MIRBAGHERIS.M.H.,  and CHIRAZIA.,},  
title = {MODELLING OF THE PERMEABILITY FOR COLUMNAR DENDRITE STRUCTURES DURING SOLIDIFICATION OF MUSHY ALLOYS}, 
abstract ={A numerical model has been developed for the determination of liquid flow permeability through columnar dendrite during growth. The model is inclusive two stages, first numerical evolution of the dendrite shape during growth, and second numerical determination of the interdendritic liquid permeability. Simulation results shown which solute concentration by evolution of dendrite shape could result to reduction of the permeability during solidification time. Comparison between the experimental data from other authors and the present numerical model data, for the low and high solid fractions, has shown a good agreement rather than current numerical models. Therefore present permeability model, in this investigation, could be used for all of the micro solidification codes by coupling on the segregation and the Fick's equations in domain of the inter-dendritic liquid for mushy alloys.},  
Keywords = {solute concentration, simulation, permeability, dendrite},
volume = {2},
Number = {3}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-52-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {FATEMI-VARZANEHS.M.,  and ZAREI-HANZAKIA.,},  
title = {THE DEFORMATION BEHAVIOR OF AZ31 MAGNESIUM ALLOY AT ELEVATED TEMPERATURES}, 
abstract ={AZ31 magnesium alloy is considered as a promising alloy in various applications and industries. Furthermore, to design a proper hot working process (rolling, forging and extrusion), the assessment of hot working behaviour of the alloy is necessary. Accordingly, the hot deformation behaviour of AZ31 alloy was studied through hot compression testing method This was carried out in a wide range of temperature (523K to 783K) and strain rates. The obtained true stress-true strain curves and final microstructures were examined and a partial melting was realized at 740K. It was concluded that the presence of liquid did change the deformation mechanisms thereby affecting the flow behaviour.},  
Keywords = {AZ31 alloy, Deformation, Dynamic recrystallization},
volume = {2},
Number = {3}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-51-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {RAZAGHIANA.,  and YUD.,  and CHANDRAT.,},  
title = {TENSILE AND FRACTURE CHARACTERISTICS OF A SIC- PARTICLE-REINFORCED 7075 ALUMINIUM ALLOY}, 
abstract ={Fracture behavior of a 7075 aluminium alloy reinforced with 15 Vol%. SiC particles was studied after T6 and annealing heat treatments under uniaxial tensile loading at room temperature. The scanning electron microscopy of fractured surfaces and EDS analysis showed:, that fracture mechanism changed from due mainly to fractured particle in T6 condition to interface decohesion in samples in annealed state. Different fracture mechanisms in annealed and T6 conditions can be ascribed mainly to the significant difference in the stress concentration levels around the particles. In T6 condition, very high local stress sufficient to cause fracture of particle can be generated during loading, while the presence of large precipitates at the particle/matrix interface produced interface decohesion leading to final fracture in the annealed state.},  
Keywords = {particle,reinforced composite, particle fracture, interface decoheion, particle/matrix interface},
volume = {2},
Number = {3}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-50-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {MOORER.E.,  and KARAKUSM.,},  
title = {IN SITU REFRACTORIES USED IN THE CONTAINMENT OF MOLTEN IRON AND STEEL STRATEGIES FOR THEIR DEVELOPMENT}, 
abstract ={In situ refractories are defined as brick or unshaped products, which react internally or with furnace atmospheres and/or slag components so as to be enhanced in their performance. Examples of such products are discussed with emphasis on those that are currently employed and are being developed for the melting of iron and steel. Some strategies for the development of future in situ products are outlined.},  
Keywords = {IN,SITU, REFRACTORY, CASTABLE, BRICKS, ALUMINA, MAGNESIA, DOLOMA, ZIRCONIA},
volume = {2},
Number = {4}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-66-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {HADIANA.M.,  and ABUFANASS.H.,},  
title = {STRENGTH AND FRACTURE TOUGHNESS OF WHISKER REINFORCED DENTAL RESIN-BASED COMPOSITES}, 
abstract ={Enhancing the properties of dental resin composites is of interest to researchers. The objective of the present investigation was to improve the strength and fracture toughness of dental composites via addition of silicon carbide whiskers and substitution of commonly used filler materials with stabilized zirconia ceramic powder. It was also intended to study the effect of powder- to- whisker ratio on mechanical properties of the resultant composites. The flexural strength and fracture toughness of composite samples with different whiskers loadings were measured. It was found that addition of whiskers to the composites enhances the mechanical properties of the composites. The strength and fracture toughness increased by increasing the amount of whiskers. The flexural strength of a composite having 60wt% whisker and 10wt% zirconia powder was about 210 MPa while that of the composite having only 60wt% ceramic powder was about 110 MPa. The microstructural examinations revealed that reinforcing mechanism was whiskers pull-out as well as crack deflection.},  
Keywords = {DENTAL, RESIN, COMPOSITE, SILICON CARBIDE, WHISKERS, ZIRCONIA, FLEXTURAL STRENGTH, FRACTURE TOUGHNESS},
volume = {2},
Number = {4}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-65-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {SHEIKHIMOGHADDAMK.,  and ATAIEA.,},  
title = {SYNTHESIS OF ULTRA-FINE PARTICLES OF BAFE12O19 BY CO- PRECIPITATION ROUTE USING CHLORIDE/NITRATE PRECURSORS}, 
abstract ={Ultra-fine particles of barium hexaferrite have been synthesized by co-precipitation method using barium nitride and iron chloride precursors with a Fe/Ba molar ratio of 11. Co-precipitation was carried out at 25 and 80°C using NaOH as a precipitant. Effect of coprecipitation and annealing temperatures on the phase composition and morphology of the products have been investigated using XRD and SEM, respectively. XRD results indicated existence of BaFeO3-x as a major phase in co-precipitated samples. Analysis of the XRD results also revealed that barium hexaferrite starts to form at a relatively low temperature of 700°C for sample synthesized at 80°C. SEM micrographs exhibit plate-like hexagonal particles of barium hexaferrite for calcined samples. The SEM results showed that the mean particle size of co-precipitated sample at 25°C is smaller than that of 80°C after calcining.},  
Keywords = {CALCINATIONS, BARIUM HEXAFERRITE, X,RAY DIFFRACTION, CO,PRECIPITATION},
volume = {2},
Number = {4}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-64-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {NOUROOZIS.,  and VARDELLEA.,},  
title = {EFFECT OF NOZZLE DIAMETER AND ATOMIZING AIR PRESSURE ON CHARACTERISTICS OF IN-FLIGHT PARTICLES IN WIRE ARC SPRAYING}, 
abstract ={In wire arc spraying, the atomizing air pressure and applied nozzle system are important factors influencing particles characteristics and coating quality. The aim of this paper is to study how the characteristics of particles such as size, velocity and temperature are influenced by the operating conditions in wire arc spray. For that, three types of wires are tested: solid wire of stainless steel 316L, cored wires 97MXC and 98MXC. Arc spray gun is an Arc Jet 9000 manufactured by TAFA. For each condition, the particles temperature and particles velocity are measured using an imaging CCD camera, Spray Watch (Oseir Ltd). Particles size distributions are determined with a laser grain meter. The morphology and composition of particles were evaluated with SEM, EDX and X-Ray diffraction. Results induce important modifications in the particles size distributions and particles velocity. A small diameter nozzle and high atomizing air pressure resulted in a reduction in particles size distributions and an increase in particles velocity.},  
Keywords = {ATOMIZING AIR PRESSURE, WIRE ARC SPRAYING, CORED WIRE, STAINLESS STEEL 316L, IN,FLIGHT PARTICLES},
volume = {2},
Number = {4}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-63-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {SALAHIE.,  and EBADZADEHT.,  and MOZTARZADEHF.,  and SOLATIHASHJINM.,},  
title = {EFFECT OF COMPOSITION ON PHASE EVOLUTION AND MICROSTRUCTURE OF REACTION BONDED MULLITE (RBM)}, 
abstract ={Compositions of Al2O3+Si, SiO2+Al and Al+Si systems were prepared to study the effect of reaction bonding process on the mullite formation. The composition of each system was adopted according to mullite stoichiometery and sintered in 700-1600°C range. Results showed that the formation of reaction bonded mullite starting from Al2O3+Si mixtures, proceeded in two partially overlapping steps, the oxidation of Si to SiO2, and the reaction of SiO2 and Al2O3 to form mullite. In this system, up to 1400°C, conversion of Si to SiO2 was taken place and cristobalite formed, but mullite formation was not observed. Mullite phase started to form at 1450°C. Results indicated that complete reaction was not occurred up to 1600°C and 2 hours soaking time. XRD patterns of samples in Al+ SiO2 system showed that the reaction through sequences: (a) reduction of SiO2 by Al, (b) formation of a- Al2O3 and SiO2-rderived Si oxidation, and (c) mullite formation. X-ray diffraction patterns of heat-treated Al+Si system showed that reaction between Al and oxygen at 900°C was occurred with the reaction product being a- Al2O3 Oxidation of Si and formation of mullite were not detected in this system. SEM micrographs showed that both Al2O3+Si and SiO2+Al systems have similar microstructures, which consisted of a- Al2O3, mullite and free Si. The microstructures of the samples in Al+Si system consisted of a- Al2O3 free Al and Si with intermetallic Al-Si compound.},  
Keywords = {MULLITE, REACTION BONDING OROCESS, ALUMINA, SILICON, SILICA},
volume = {2},
Number = {4}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-62-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {SAREMIM.,  and NOURIDELAVARA.,  and KAZEMIM.,},  
title = {ELECTROCHEMICAL NOISE ANALYSIS OF 70-30 BRASS DURING STRESS CORROSION CRACKING TEST IN MATTSON S SOLUTION}, 
abstract ={An investigation of the electrochemical noise generation during Stress Corrosion Cracking (SCC) of 70-30 Brass in Mattson's solution was conducted. The fluctuations of potential and current were monitored. The relationship between potential and current fluctuations has been evaluated in time domain and the obtained data has been analyzed in the frequency domain using Power Spectral Density (PSD). It is shown that 70-30 Brass has characteristic noise behavior during SCC that is step-by-step change in current and potential up to the final stage of fracture, and this may be used for SCC monitoring.},  
Keywords = {ELECTROCHEMICAL NOISE, STRESS CORROSION CRACKING, BRASS},
volume = {2},
Number = {4}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-61-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {ARABIH.,  and SEYEDEINS.H.,  and SATARIM.,  and TABATABAIEN.,},  
title = {NEW METHOD FOR LIFE ASSESSMENT OF 1%CR-0.5% MO LOW ALLOY STEEL ON THE BASE OF GRAIN BOUNDARY CREEP CAVITATIONS}, 
abstract ={Life assessment on the base of grain boundary creep cavitation of 1%Cr - 0.5%Mo low alloy steel has been discussed in this paper. Since microstructural degradation is one of the most important mechanisms that affects creep life, it is necessary to assess microstructural damage in order to estimate the life. Microstructural damage within the grain boundaries is a continuous phenomena starting from about the beginning of secondary stage of creep process. In this research, the amounts of damage accumulation in the form of grain boundary cavitations for various creep times up to the ends of secondary creep stage for each creep condition was found by using quantitative metallography technique, i.e. image analyser. Then from the data obtained for grain boundary area cavitated and number of cavities per unit area, which was about linear as a function of time for each of creep conditions, the amount of damage in the tertiary stage was estimated for various times. Then a creep damage parameter was proposed for the creep process. Finally, having this damage parameter (?) and using continuum damage mechanics (CDM), a new version of Rabotnov-Kachanov equation for tertiary creep rate was established.},  
Keywords = {CREEP CAVITATION, CONTINUUM DAMAGE MECHANICS, DAMAGE PARAMETER, RABOTNOV,KACHANOV EQUATIONS},
volume = {2},
Number = {4}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-60-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}

@article{ 
author = {HOMAYONIFARP.,  and SABOOHIY.,  and FIROUZABADIB.,},  
title = {MODELING OF NEW PROCESS IN MIDREX SYNGAS SYSTEM}, 
abstract ={Iron and steel is an energy intensive industry and its contribution to the pollution of environment is considerable. Direct reduction iron (DRI) is a major element of an iron and steel production plant. Its share in natural gas and electricity consumption of total plant is estimated to be 70% and 15% respectively. Reduction gases are produced in natural gas reforming unit and its elements are CO and H2. A major consequence of using this technology is high level of CO2 emission, which pollutes the environment. An alternative to the existing technology is utilization of H2 as reducing agent. A comparison of various hydrogen production processes indicate that thermal decomposition of methane provides an attractive option from economical and technical point of view. Therefore, a system for producing hydrogen, based on thermal decomposition technique, has been designed in the framework of the present paper.},  
Keywords = {THERMAL DECOMPOSITION OF METHANE, HYDROGEN PRODUCTION, MIDREX CARBON},
volume = {2},
Number = {4}, 
pages = {9-15}, 
publisher = { Iran University of Science & Technology},
title_fa = {},
abstract_fa ={},
keywords_fa = {},
url = {http://ijmse.iust.ac.ir/article-1-59-en.html},  
eprint = {},  
journal = {Iranian Journal of Materials Science and Engineering},  
issn = {1735-0808}, 
eissn = {2383-3882}, 
year = {2005}  
}