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Journal of Advanced Ceramics 2019, 8(4): 555-563 https://doi.org/10.1007/s40145-019-0338-0
Research Article | Open Access | Issue | Published: 04 December 2019

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

Show Author's Information Guangxiang ZHUa,b,c,  Qian FENGd,  Jinshan YANGa,b( ),  Jianbao HUa,b,  Hongda WANGa,b,  Yudong XUEa,b,c,  Qingliang SHANa,b,c,  Shaoming DONGa,b( )
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
University of Chinese Academy of Sciences, Beijing 100049, China
Analysis and Testing Center, Donghua University, Shanghai 201600, China
Keywords:
boron nitride nanotubes (BNNTs), interface, nanocomposites, toughness and toughening
Cite this article:
ZHU G, FENG Q, YANG J, et al. Effect of BNNTs/matrix interface tailoring on toughness and fracture morphology of hierarchical SiCf/SiC composites. Journal of Advanced Ceramics, 2019, 8(4): 555-563. https://doi.org/10.1007/s40145-019-0338-0
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Abstract Full text About this article

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.


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About this article

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

Show Author's information Guangxiang ZHUa,b,c, Qian FENGd, Jinshan YANGa,b( ), Jianbao HUa,b, Hongda WANGa,b, Yudong XUEa,b,c, Qingliang SHANa,b,c, Shaoming DONGa,b( )
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
University of Chinese Academy of Sciences, Beijing 100049, China
Analysis and Testing Center, Donghua University, Shanghai 201600, China

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

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Publication history
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Publication history

Received: 28 December 2018
Revised: 24 March 2019
Accepted: 03 May 2019
Published: 04 December 2019
Issue date: December 2019

Copyright

© The author(s) 2019

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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