WANG Lin-shan, XIONG Xiang, XIAO Peng, YAN Zhi-qiao, ZHANG Hong-bo, LIU Gen-shan. 高温热处理对C/C-SiC复合材料制备与力学性能的影响. New Carbon Mater., 2005, 20(03): 245-249.
Citation:
WANG Lin-shan, XIONG Xiang, XIAO Peng, YAN Zhi-qiao, ZHANG Hong-bo, LIU Gen-shan. 高温热处理对C/C-SiC复合材料制备与力学性能的影响. New Carbon Mater., 2005, 20(03): 245-249.
WANG Lin-shan, XIONG Xiang, XIAO Peng, YAN Zhi-qiao, ZHANG Hong-bo, LIU Gen-shan. 高温热处理对C/C-SiC复合材料制备与力学性能的影响. New Carbon Mater., 2005, 20(03): 245-249.
Citation:
WANG Lin-shan, XIONG Xiang, XIAO Peng, YAN Zhi-qiao, ZHANG Hong-bo, LIU Gen-shan. 高温热处理对C/C-SiC复合材料制备与力学性能的影响. New Carbon Mater., 2005, 20(03): 245-249.
State Key Laboratory for Powder Metallurgy,Central South University,Changsha 410083,China; 2.General Research Institute for Nonferrous Matals,Beijing 100088,China
C/C preforms were prepared by densification of carbon fiber felts, using furan resin impregnation, carbonization, CVD and an initial high temperature treatment (HTT) at 2000-2400℃ followed by a second resin impregnation and carbonization. The C/C-SiC composites were manufactured by molten silicon infiltration of the as-obtained C/C preforms at 1650℃ with or without a second HTT. The effect of the first HTT on the density, porosity, mechanical properties and fracture mode of the C/C-SiC composites was studied. Results show that the first HTT results in C/C-SiC composites with a “pesuo-plastic” fracture mode and better general mechanical properties. The second HTT of the C/C preforms results in carbon with open porosity, which is favorable for molten silicon infiltration, leading to a C/C-SiC composite with high density and low porosity, but the mechanical properties decrease while the fracture mode is unchanged.