高温热处理对国产KD-SA型SiC纤维组成结构与力学性能的影响

吴爽, 苟燕子, 王永寿, 宋曲之, 张庆雨, 王应德

Effect of Heat Treatment on Composition, Microstructure and Mechanical Property of Domestic KD-SA SiC Fibers

WU Shuang, GOU Yanzi, WANG Yongshou, SONG Quzhi, ZHANG Qingyu, WANG Yingde

表1 热处理前后SiC纤维的组成和基本性能

Table 1 Composition and general properties of SiC fibers before and after heat treatment

Parameter F-II F-II-1800 ℃ F-III F-III-1800 ℃ C/Si 1.34 1.42 1.08 1.08 Al content/ (%, in mass) / / <1.00 <1.00 O content/ (%, in mass) 0.98 0.53 0.07 0.05 Diameter/μm 12.0 11.9 9.9 9.9 Density/ (g·cm-3) 2.72 2.66 3.08 3.09 Tensile strength/ GPa 2.7 0.9 1.8 1.8 Elastic modulus/GPa 260 207 372 366