Influence of SiC Nanowires on the Damage Evolution of SiCf/SiC Composites

被引：1
|
作者：
Li Longbin [1 ,2 ]
Xue Yudong [1 ,2 ]
Hu Jianbao [1 ,2 ]
Yang Jinshan [1 ,2 ]
Zhang Xiangyu [1 ,2 ]
Dong Shaoming [1 ,2 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
来源：
JOURNAL OF INORGANIC MATERIALS | 2021年 / 36卷 / 10期
关键词：
hierarchical composites; SiC nanowire; mechanical properties; acoustic emission; DEPENDENT MATRIX CRACKING; STRESS-STRAIN BEHAVIOR; MECHANICAL-PROPERTIES;
D O I：
10.15541/jim20210045
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
SiC fiber (SiCf)/SiC composites were modified by SiC nanowires (SiCnw) grown in-situ on SiC fiber to obtain hierarchical structure. Effects of this hierarchical structure on the properties of composites, such as microstructure, fracture strength and damage evolution, were evaluated. Results show that the introduction of SiCnw significantly improves the matrix infiltration efficiency. SiCnw and BN-coated SiCnw reinforced SiCf/SiC composites acquire better performance in bending tests by comparison with conventional SiCf/SiC. SiCnw coated by BN interphase obviously enhances the strength owing to weak-bonded interface. Besides, results of acoustic emission and Coated Vickers Hardness Impresses reveal that SiCnw delay early damage evolution at early state and mainly make contribution to hindering and bridging of microcracks, which is further enhanced by BN-coated SiCnw.
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收藏
页码：1111 / 1117
页数：7
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