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无机材料学报

无机材料学报

• 研究论文 • 上一篇    

CVD SiC涂层对3D C/SiC氧化行为的影响

吴守军, 成来飞, 张立同, 徐永东, 陈照峰   

  1. 西北工业大学超高温复合材料实验室, 西安 710072
  • 收稿日期:2004-01-09 修回日期:2004-03-05 出版日期:2005-01-20 网络出版日期:2005-01-20

Effect of CVD SiC Coatings on Oxidation Behaviors of Three Dimensional C/SiC Composites

WU Shou-Jun, CHENG Lai-Fei, ZHANG Li-Tong, XU Yong-Dong, CHEN Zhao-Feng   

  1. Laboratory of Thermostructure Composite materials, Northwestern Polytechnical University, Xi’an 710072, China
  • Received:2004-01-09 Revised:2004-03-05 Published:2005-01-20 Online:2005-01-20

PDF (PC)

1734

被引次数

27

摘要： 采用两种不同沉积速度的等温减压化学气相沉积在3D C/SiC上制备了多层CVD SiC涂层. 利用扫描电镜对涂层表面和断面进行显微分析, 考察了涂层在1300℃下进行恒温氧化的防
护效果. 慢速减压化学气相沉积能够对多层CVD SiC涂层的涂层间隙缺陷实现有效控制, 所制备的多层涂层可以消除涂层间隙, 连贯的结合为一整体, 能显著提高涂层防护效果, 材料在1300℃
空气中氧化30h后的失重率可控制在1%以下.

关键词: C/SiC复合材料, 涂层, 氧化, 缺陷

Abstract: Two kinds of multilayer CVD SiC coatings were prepared by LPCVD on a three dimensional C/SiC composites. The surface and cross section micromorphologies of the coatings were analyzed by SEM.
The oxidation behaviors of the composites with multilayer coatings at 1300℃ in air were studied. The interlayer gaps of the multilayers can be effectively controlled by the slow deposition. The multilayer
coatings prepared by the slow deposition were integrated as a whole which can improve the oxidation protection property evidently. The weight loss of the 3D C/SiC protected with the multilayer CVD SiC
coatings prepared by slow deposition after oxidation for 30h at 1300℃ in air can be controlled below 1%.

Key words: C/SiC composite, coating, oxidation, defects

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