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Journal of Advanced Ceramics 2018, 7(2): 169-177 https://doi.org/10.1007/s40145-018-0268-2
Research Article | Open Access | Issue | Published: 28 March 2018

KD-S SiCf/SiC composites with BN interface fabricated by polymer infiltration and pyrolysis process

Show Author's Information Honglei WANGa,b,  Shitao GAOb,  Shuming PENGa,  Xingui ZHOUb( ),  Haibin ZHANGa,  Xiaosong ZHOUa,  Bin LIb( )
Innovation Research Team for Advanced Ceramics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sicuan 621900, China
Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha, Hunan 410073, China
Keywords:
composites, polymer infiltration and pyrolysis (PIP), silicon carbide (SiC), interface layer, boron nitride (BN)
Cite this article:
WANG H, GAO S, PENG S, et al. KD-S SiCf/SiC composites with BN interface fabricated by polymer infiltration and pyrolysis process. Journal of Advanced Ceramics, 2018, 7(2): 169-177. https://doi.org/10.1007/s40145-018-0268-2
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Abstract Full text About this article

Continuous silicon carbide fiber reinforced silicon carbide matrix (SiCf/SiC) composites are attractive candidate materials for aerospace engine system and nuclear reactor system. In this paper, SiCf/SiC composites were fabricated by polymer infiltration and pyrolysis (PIP) process using KD-S fiber as the reinforcement and the LPVCS as the precursor, while the BN interface layer was introduced by chemical vapor deposition (CVD) process using borazine as the single precursor. The effect of the BN interface layer on the structure and properties of the SiCf/SiC composites was comprehensively investigated. The results showed that the BN interface layer significantly improved the mechanical properties of the KD-S SiCf/SiC composites. The flexure strength and fracture toughness of the KD-S SiCf/SiC composites were evidently improved from 314±44.8 to 818±39.6 MPa and 8.6± 0.5 to 23.0±2.2 MPa·m1/2, respectively. The observation of TEM analysis displayed a turbostratic structure of the CVD-BN interface layer that facilitated the improvement of the fracture toughness of the SiCf/SiC composites. The thermal conductivity of KD-S SiCf/SiC composites with BN interface layer was lower than that of KD-S SiCf/SiC composites without BN interface layer, which could be attributed to the relative low thermal conductivity of BN interface layer with low crystallinity.


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About this article

KD-S SiCf/SiC composites with BN interface fabricated by polymer infiltration and pyrolysis process

Show Author's information Honglei WANGa,b, Shitao GAOb, Shuming PENGa, Xingui ZHOUb( ), Haibin ZHANGa, Xiaosong ZHOUa, Bin LIb( )
Innovation Research Team for Advanced Ceramics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, Sicuan 621900, China
Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha, Hunan 410073, China

Abstract

Continuous silicon carbide fiber reinforced silicon carbide matrix (SiCf/SiC) composites are attractive candidate materials for aerospace engine system and nuclear reactor system. In this paper, SiCf/SiC composites were fabricated by polymer infiltration and pyrolysis (PIP) process using KD-S fiber as the reinforcement and the LPVCS as the precursor, while the BN interface layer was introduced by chemical vapor deposition (CVD) process using borazine as the single precursor. The effect of the BN interface layer on the structure and properties of the SiCf/SiC composites was comprehensively investigated. The results showed that the BN interface layer significantly improved the mechanical properties of the KD-S SiCf/SiC composites. The flexure strength and fracture toughness of the KD-S SiCf/SiC composites were evidently improved from 314±44.8 to 818±39.6 MPa and 8.6± 0.5 to 23.0±2.2 MPa·m1/2, respectively. The observation of TEM analysis displayed a turbostratic structure of the CVD-BN interface layer that facilitated the improvement of the fracture toughness of the SiCf/SiC composites. The thermal conductivity of KD-S SiCf/SiC composites with BN interface layer was lower than that of KD-S SiCf/SiC composites without BN interface layer, which could be attributed to the relative low thermal conductivity of BN interface layer with low crystallinity.

Keywords: composites, polymer infiltration and pyrolysis (PIP), silicon carbide (SiC), interface layer, boron nitride (BN)

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Publication history

Received: 08 December 2017
Accepted: 13 March 2018
Published: 28 March 2018
Issue date: June 2018

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© The author(s) 2018

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Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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