Effect of BNNTs/matrix interface tailoring on toughness and fracture morphology of hierarchical SiCf/SiC composites

被引:0
|
作者
Guangxiang ZHU [1 ,2 ,3 ]
Qian FENG [4 ]
Jinshan YANG [1 ,2 ]
Jianbao HU [1 ,2 ]
Hongda WANG [1 ,2 ]
Yudong XUE [1 ,2 ,3 ]
Qingliang SHAN [1 ,2 ,3 ]
Shaoming DONG [1 ,2 ]
机构
[1] State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences
[2] Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences
[3] Analysis and Testing Center, Donghua University
[4] University of Chinese Academy of Sciences
基金
中国国家自然科学基金;
关键词
boron nitride nanotubes(BNNTs); interface; nanocomposites; toughness and toughening;
D O I
暂无
中图分类号
TB33 [复合材料];
学科分类号
0805 ; 080502 ;
摘要
A thin BN interphase is applied on BNNTs surface to tailor the interfacial bonding between BNNTs and SiC matrix in hierarchical SiCf/SiC composites. The thickness of BN interphase ranging from 10 to 70 nm can be optimized by chemical vapor deposition after BNNTs are in situ grown on SiC fiber surface. Without BN interphase, the fracture toughness of hierarchical Si Cf/Si C composites can be impaired by 13.6% due to strong interfacial bonding. As long as BN interphase with 30–45 nm thickness is applied, the interfacial bonding can be optimized and fracture toughness of hierarchical composites can be improved by 27.3%. It implies that tailoring BNNTs/matrix interface by depositing a layer of BN interphase is in favor of activating energy dissipation mechanisms at nanoscale induced by BNNTs.
引用
收藏
页码:555 / 563
页数:9
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