Journal of Inorganic Materials ›› 2023, Vol. 38 ›› Issue (5): 561-568.DOI: 10.15541/jim20220555

• RESEARCH ARTICLE • Previous Articles     Next Articles

Influence of High Temperature Treatment of C/C Porous Preform on Friction and Wear Behavior of C/C-SiC Composites

ZHANG Shuo(), FU Qiangang(), ZHANG Pei, FEI Jie, LI Wei   

  1. State Key Laboratory of Solidification Processing, Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials, Northwestern Polytechnical University, Xi’an 710072, China
  • Received:2022-09-22 Revised:2022-11-21 Published:2022-12-09 Online:2022-12-09
  • Contact: FU Qiangang, professor. E-mail:
  • About author:ZHANG Shuo (1994-), female, PhD candidate. E-mail:
  • Supported by:
    National Natural Science Foundation of China(52125203);National Natural Science Foundation of China(51872239);National Key Research and Development Program of China(2021YFA0715800);Science Center for Gas Turbine Project(P2021-A-IV-003-001)


Controlling the structure and properties of low-density C/C porous preforms is the key to the preparation of C/C-SiC composites with excellent friction and wear properties. In this study, C/C porous preforms prepared by chemical vapor infiltration were subjected to high temperature heat-treatment at 2100 ℃. C/C-SiC composites were prepared by reactive melt infiltration. Effects of high temperature heat-treatment of C/C porous preforms on microstructures, thermal properties and tribological properties of C/C-SiC composites were investigated. The results showed that the porosity and graphitization degree of the C/C porous performs increased after high temperature heat-treatment at 2100 ℃. The C/C-SiC composites have a higher density (2.22 g/cm3), and the porosity is reduced from 5.1% to 3.4%, the phase content of SiC ceramic is increased by 11.9%. The mean free path of phonons is larger when C/C porous preforms have a higher degree of graphitization, resulting in thermal conductivity at room temperature being increased by 2.1 times, and the thermal conductivity at 1200 ℃ being increased by 0.2 times. Wear surface of C/C-SiC composites forms a continuous and stable friction film, which is attributed to the fact that the PyC after high temperature treatment is softer and easier to be extruded into a film. Thus, the friction coefficient is more stable, and the wear rate is reduced under the test loads of 3, 6 and 9 N, by 47.8%, 41.9% and 11.7%, and the average friction coefficients are 0.47, 0.38 and 0.39, respectively. Therefore, high temperature heat-treatment of the C/C porous preforms can improve the thermal conductivity of the C/C-SiC composites, which exhibits a more stable friction coefficient and more wear-resistant.

Key words: C/C-SiC composites, high temperature treatment, thermal conductivity, friction, wear resistance

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