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Journal of Advanced Ceramics

, Volume 7, Issue 2, pp 169–177 | Cite as

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

  • Honglei Wang
  • Shitao Gao
  • Shuming Peng
  • Xingui Zhou
  • Haibin Zhang
  • Xiaosong Zhou
  • Bin Li
Open Access
Research Article

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

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

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China with Grant Nos. 51502343 and 91426304.

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Copyright information

© The Author(s) 2018

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.

Authors and Affiliations

  1. 1.Innovation Research Team for Advanced Ceramics, Institute of Nuclear Physics and ChemistryChina Academy of Engineering PhysicsMianyang, SicuanChina
  2. 2.Science and Technology on Advanced Ceramic Fibers and Composites LaboratoryNational University of Defense TechnologyChangsha, HunanChina

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