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Journal of Advanced Ceramics

, Volume 8, Issue 4, pp 555–563 | Cite as

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

  • Guangxiang Zhu
  • Qian Feng
  • Jinshan YangEmail author
  • Jianbao Hu
  • Hongda Wang
  • Yudong Xue
  • Qingliang Shan
  • Shaoming DongEmail author
Open Access
Research Article

Abstract

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 SiCf/SiC 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.

Keywords

boron nitride nanotubes (BNNTs) interface nanocomposites toughness and toughening 

Notes

Acknowledgements

This work is supported by National Natural Science Foundation of China (Grant Nos. 51772310 and 51502323), the National Key Research and Development Program of China (Grant No. 2017YFB0703200), the research grant from Science and Technology Commission of Shanghai Municipality (Grant No. 16DZ2260600), Science Foundation for Youth Scholar of State Key Laboratory of High Performance Ceramics (Grant No. SKL201601), and Chinese Academy of Science (Grant No. QYZDY-SSW-JSC031).

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Authors and Affiliations

  • Guangxiang Zhu
    • 1
    • 2
    • 3
  • Qian Feng
    • 4
  • Jinshan Yang
    • 1
    • 2
    Email author
  • Jianbao Hu
    • 1
    • 2
  • Hongda Wang
    • 1
    • 2
  • Yudong Xue
    • 1
    • 2
    • 3
  • Qingliang Shan
    • 1
    • 2
    • 3
  • Shaoming Dong
    • 1
    • 2
    Email author
  1. 1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina
  2. 2.Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina
  3. 3.University of Chinese Academy of SciencesBeijingChina
  4. 4.Analysis and Testing CenterDonghua UniversityShanghaiChina

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