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首页> 外文会议>Inorganic thin films and coatings >A C/SiC Graded Coating on C/C Composites by LPCVD in the Methyltrichlorosilane/Hydrogen System
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A C/SiC Graded Coating on C/C Composites by LPCVD in the Methyltrichlorosilane/Hydrogen System

机译：甲基三氯硅烷/氢体系中LPCVD在C / C复合材料上的C / SiC梯度涂层

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摘要

In order to improve the anti-oxidation of C/C composites, a C/SiC functionally graded coating for C/C composites was prepared by low pressure chemical vapor deposition (LPCVD) using methyltrichlorosilane (MTS, CH_3SiCl_3) and H_2 as precursors. The relative amount of C and SiC in coatings was varied by controlling the input ratio of H_2 to MTS. The phase composition and morphology were examined by scanning electron microscope (SEM) and X-ray diffraction (XRD), and the content distribution of C and SiC phases were investigated by energy dispersive spectroscopy (EDS). The isothermal oxidation test was evaluated at 900℃ and 1500℃ respectively. The results showed that the as-obtained coatings were possessed of a dense and uniform structure, and the SiC content in coatings increased with an increment of the molar ratio of H_2 to MTS. The C/SiC coating had a good oxidation resistance for C/C composites.
机译：为了改善C / C复合材料的抗氧化性，使用甲基三氯硅烷（MTS，CH_3SiCl_3）和H_2作为前体，通过低压化学气相沉积（LPCVD）制备了用于C / C复合材料的C / SiC功能梯度涂层。通过控制H_2与MTS的输入比可以改变涂层中C和SiC的相对含量。通过扫描电子显微镜（SEM）和X射线衍射（XRD）检查相组成和形貌，并通过能量色散谱（EDS）研究C和SiC相的含量分布。等温氧化试验分别在900℃和1500℃下进行。结果表明，所获得的涂层具有致密均匀的结构，涂层中的SiC含量随H_2与MTS的摩尔比的增加而增加。 C / SiC涂层对C / C复合材料具有良好的抗氧化性。

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  • 来源
  • 会议地点 Guilin(CN)
  • 作者

    He Zibo; Li Hejun; Shi Xiaohong;

  • 作者单位

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China;

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China;

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    LPCVD; C/SiC; graded coating; oxidation resistance;

    机译：低压化学气相沉积;碳/碳化硅;渐变涂层；抗氧化性;

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