摘要
采用真空热压烧结工艺制备了高致密的短 C纤维 (Cf)补强增韧 Si O2 基复合材料 ,研究了其组织结构、力学性能和强韧化机制。10 % Cf/ Si O2 复合材料非晶态基体 Si O2 只发生部分晶化 ,Cf 在基体中分布较均匀 ,并呈层状分布。复合材料强度、断裂韧性和断裂应变均较基体显著改善 ,分别达到 74MPa,2 .4MPa.m1 /2 和 0 .144 %。压痕裂纹扩展行为和断口分析表明 ,Cf的桥接。
The microstructure, mechanical properties, the mechanisms of strengthening and toughening for the 10%C f/SiO 2 composite prepared by vacuum hot pressing, were studied. The SiO 2 glass matrix crystallized partially after hot pressing. The composite has a lamellar structure with the carbon fibers in parallel with the hot pressing plane. The bending strength, fracture toughness and fracture strain of the composite are significantly improved, compared with that of the matrix. Bridging and pulling out of carbon fibers and crabon fibers and crack deflection induced by the carbon fibers are the principal mechanisms of strengthening and toughening.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2001年第6期437-439,共3页
Rare Metal Materials and Engineering
关键词
复合材料
组织
性能
强韧化机制
短碳纤维
二氧化硅玻璃陶瓷
short carbon fiber
SiO2 matrix composite
microstructure and property
strengthening and toughening mechanisms
