Iranian Journal of Materials Science and Engineering

en Fabrication and Ablation Behavior of a Novel 3D Orthogonal Woven C/C-SiC-HfC Composite by I-CVI, SI, and LSI Combined Process گروه سرامیک Ceramic Materials and Engineering Research Paper Research Paper <div style="text-align: justify;">A C/C-SiC-HfC composite was fabricated using a three-dimensional orthogonally woven (3DW) preform, and the effect of HfC ultra-high temperature ceramic (UHTC) particles on the microstructure and ablation properties of the composite was evaluated. First, pyrolytic carbon (PyC) was infiltrated into the 3DW preform by the I-CVI method. Then, impregnation of a suspension composed of HfC particles and phenolic resin into the 3DW preform. Next, liquid Si alloy was infiltrated into the C/C-HfC porous structure at 1650 °C to form a C/C composite with a SiC-HfC matrix. HfC particles and the continuous SiC phase among carbon fibers were saturated and during the oxyacetylene test, covered the surface of the C/C-SiC-HfC composite as a dense continuous SiO2-HfO2 layer. This layer acted as a barrier against the diffusion of oxygen into the bulk parts of the C/C-SiC-HfC composite. The results of the oxyacetylene flame test at 2500 °C for 120 s showed that the mass and linear ablation rates of the C/C-SiC composite were 4.8 mg/s and 3.75 µm/s, respectively. After the addition of HfC and the formation of the C/C-SiC-HfC composite, these rates decreased to 1.6 mg/s and 0.98 µm/s, respectively.</div> ,Three-dimensional orthogonally woven (3DW),liquid silicon infiltration (LSI),C/C-SiC-HfC composite,ablation behavior 0 0 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-5615-2&slc_lang=en&sid=1 Amin Rezaei Chekani amin.rezaei133@gmail.com 1800319475328460022191 1800319475328460022191 Yes (1) PhD Candidate, Department of Materials and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran Malek Naderi mnaderi@aut.ac.ir 1800319475328460022192 1800319475328460022192 No Department of Materials and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran. Reza Aliasgarian aliasgarian@aut.ac.ir 1800319475328460022193 1800319475328460022193 No Department of Materials and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran Yousef Safaei-Naeini yousef.Safaei@gmail.com 1800319475328460022194 1800319475328460022194 No Isfahan University of Technology Faculty of Material Engineering, Isfahan Province