摘要
采用先驱体浸渍法制备了 3种不同纤维增强的SiC基复合材料 ,观察、分析了材料的微观结构、界面成分以及相应的材料性能 .研究发现 :在制备过程中Si和O会逐渐从基体扩散到纤维中 ,并导致纤维性能的劣化 .M4 0JB碳纤维受损最严重 ,所制备材料性能最差 ;采用Hi-Nicalon纤维增强的SiC基复合材料具有最佳的性能 ,单向板弯曲强度达到 70 3.6MPa,断裂韧性达到 2 3.1MPa·m1/ 2 .
Three different fiber reinforced SiC matrix composites were made by polymer infiltration. The microstructure of the composites and the composition of the composite interfaces were analyzed. It is found that Si and O diffuse into fiber from the matrix and damage the fiber. The damage degree of carbon fiber M40JB is the highest among the three and the properties of its composites are poor. The properties of silicon carbide composites reinforced with Hi-Nicalon fiber are the best. Its bending strength and fracture toughness reach 703.6 MPa and 23.1 MPa·m 1/2 respectively.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2000年第5期487-490,共4页
Journal of The Chinese Ceramic Society
关键词
碳化硅基
复合材料
纤维增强
界面
微结构
silicon carbide based composite
interface
carbon fiber
silicon carbide fiber
fiber reinforced
