Oxidative Ablation Behavior of W‐Coated C/C Composites Prepared by Chemical Vapor Deposition with Heat Treatment

Author:

Zhou Zhe12ORCID,Tao Chuangfang1,Chen Bin1,Liao Huanyi1,Mao Weiguo12,Sun Zexu3,Fan Xizhi1,Fan Zheqiong1,Cheng Yuan4

Affiliation:

1. College of Materials Science and Engineering Changsha University of Science and Technology Changsha 410114 China

2. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory National University of Defense Technology Changsha 410073 China

3. School of Materials Science and Engineering Beihang University No.37, Xueyuan Road Beijing 100191 China

4. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150000 China

Abstract

To improve the ablation resistance of C/C composites, tungsten (W) coating is applied by chemical vapor deposition (CVD) technology on C/C composites. Results show that the coatings are dense, with a thickness of about 400 μm. After heat treatment at a temperature of 1500 °C for 1 h, the main component of coating is W2C. Additionally, a dense WC layer forms on the surface of pyrolytic carbon (PyC). The sample subjected to heat treatment remains relatively intact after ablation at 3000 °C for 60 s, with a mass and linear ablation rate of 1.83 × 10−5 g s−1 and 3.03 × 10−5 cm s−1, respectively. The high‐temperature stability of WC formed on PyC and the filling of fiber gaps to prevent oxygen penetration are the main reasons for the improved ablation resistance of W‐coated C/C composites.

Publisher

Wiley

Subject

Condensed Matter Physics,General Materials Science

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