物理化学学报 >> 2012, Vol. 28 >> Issue (01): 239-244.doi: 10.3866/PKU.WHXB201228239

材料物理化学 上一篇    下一篇

两步法制备具有自愈合能力的纯SiC涂层

陈旸1,2, 王成国2, 赵伟2   

  1. 1. 山东大学材料液固结构演变与加工教育部重点实验室, 济南 250061;
    2. 山东大学碳纤维工程技术研究中心, 济南 250061
  • 收稿日期:2011-07-18 修回日期:2011-10-19 发布日期:2011-12-29
  • 通讯作者: 王成国 E-mail:sduwangchg@gmail.com
  • 基金资助:

    国家重点基础研究发展规划项目(973) (2011CB605601)和国际科技合作项目(2009DFR50600)资助

Fabrication of a Self-Healing Pure SiC Coating by a Two-Step Technique

CHEN Yang1,2, WANG Cheng-Guo2, ZHAO Wei2   

  1. 1. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan 250061, P. R. China;
    2. Carbon Fiber Engineering Research Center, Shandong University, Jinan 250061, P. R. China
  • Received:2011-07-18 Revised:2011-10-19 Published:2011-12-29
  • Contact: WANG Cheng-Guo E-mail:sduwangchg@gmail.com
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2011CB605601) and International Technical Cooperation Projects, China (2009DFR50600).

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摘要： 为了提高碳/碳(C/C)复合材料的抗氧化性能, 通过两步法在基体表面制备了具有自愈合能力的纯SiC涂层. 首先, 通过高含氢硅油(H-PSO)的高温热解在基体表面引入SiC 纳米线, 然后通过高温渗Si, 在碳材料表面生成厚度约为100-200 μm的涂层. 通过X射线衍射(XRD)、扫描电子显微镜(SEM)表征了所制备的涂层形貌及相组成, 并对所制备的试样进行了氧化实验. 实验结果表明: 涂层是由纯SiC构成的, 且具有一定的自愈合能力; 所制备的试样在1400 °C下氧化4 h, 失重仅为0.71%, 抗氧化性能得到提高.

关键词: C/C复合材料, SiC纳米线, SiC涂层, 抗氧化性能, 自愈合

Abstract: A self-healing pure SiC coating was prepared on a carbon/carbon (C/C) composite by a two-step technique to protect the C/C composite from oxidation. First, SiC nanowires were obtained on the substrate surface by the thermal decomposition of hydrogen silicone oil (H-PSO). Second, a coating with a thickness of 100-200 μm was produced by infiltrating with silicon at high temperature in an argon atmosphere. The morphology and phase composition of the coating were observed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Oxidation tests were carried out on specimens and the results indicated that the obtained coating consisted of pure SiC and had a certain self-healing ability. The SiC self-healing coating significantly increased the antioxidant properties of the C/C composites and it protected the C/C composites from oxidation at 1400 °C in air over 4 h with a corresponding mass loss of only 0.71%.

Key words: C/C composite, SiC nanowire, SiC coating, Oxidation resistance, Self-healing