J. Mater. Sci. Technol. ›› 2010, Vol. 26 ›› Issue (12): 1139-1142.

• Research Articles • 上一篇    下一篇

1873K温度下使用的炭/炭复合材料 C/SiC/Si-SiC 复合涂层研究

张雨雷1,李贺军2,李克智1,强新发1   

  1. 1. 西北工业大学
    2. 西北工业大学材料学院
  • 收稿日期:2009-12-14 修回日期:2010-04-02 出版日期:2010-12-31 发布日期:2010-12-21
  • 通讯作者: 张雨雷
  • 基金资助:

    国家自然科学基金资助项目;博士后科学基金特别资助;博士后科学基金

Oxidation Protective C/SiC/Si-SiC Multilayer Coating for Carbon/Carbon Composites Applying at 1873 K

Yulei Zhang, Hejun Li, Xinfa Qiang, Kezhi Li   

  1. C/C Composites Research Center, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi0an 710072, China
  • Received:2009-12-14 Revised:2010-04-02 Online:2010-12-31 Published:2010-12-21
  • Supported by:

    the National Natural Science Foundation of China under Grant Nos. 50902111 and 90716024, the China Postdoctoral Science Foundation under Grant No. 20080441186, and the China Postdoctoral Science Special Foundation under Grant No. 200902603

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摘要： A C/SiC/Si-SiC multilayer coating for protecting carbon/carbon (C/C) composites against oxidation was prepared by slurry and pack cementation. XRD (X-ray diffraction) and EDS (energy dispersive spectroscopy ) analysis showed that the inner coating obtained from the slurry and pack cementation was a C/SiC gradient layer acting as bonding layer, and the exterior coating formed in the second pack cementation was a Si-SiC double phase coating. Oxidation tests at 1873 K in air showed that the coating exhibited excellent oxidation protective ability and thermal shock resistance. The coating could effectively protect C/C composites from oxidation at 1873 K in air for 170 h and undergo the thermal cycling between 1873 K and room temperature for 8 cycles. The weight loss of the coated C/C composites is due to the formation of cracks and holes in the coating and the volatilization of SiO2 glass at high temperature.

关键词: KEY WORDS: Carbon/carbon composites, Oxidation, Coating

Abstract: A C/SiC/Si-SiC multilayer coating for protecting carbon/carbon (C/C) composites against oxidation was prepared by slurry and pack cementation. X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) analysis showed that the inner coating obtained from the slurry and pack cementation was a C/SiC gradient layer acting as bonding layer, and the exterior coating formed in the second pack cementation was a Si-SiC double phase coating. Oxidation tests at 1873 K in air showed that the coating exhibited excellent oxidation protective ability and thermal shock resistance. The coating could effectively protect C/C composites from oxidation at 1873 K in air for 170 h and undergo the thermal cycling between 1873 K and room temperature for 8 cycles. The weight loss of the coated C/C composites is due to the formation of cracks and holes in the coating and the volatilization of SiO2 glass at high temperature.

Key words: Carbon/carbon composites, Oxidation, Coating