无机材料学报

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炭/炭复合材料表面预炭层的制备及其性能研究

张雨雷, 李贺军, 付前刚, 李克智, 欧阳海波   

  1. 西北工业大学 炭/炭复合材料工程技术研究中心, 西安 710072
  • 收稿日期:2008-04-14 修回日期:2008-05-29 出版日期:2009-01-20 网络出版日期:2009-01-20

Preparation and Performance of Pre-coated Carbon Layer for Carbon/Carbon Composites

ZHANG Yu-Lei, LI He-Jun, FU Qian-Gang, LI Ke-Zhi, OUYANG Hai-Bo   

  1. C/C Composites Technology Research Center, Northwestern Polytechnical University, Xi’an 710072, China
  • Received:2008-04-14 Revised:2008-05-29 Published:2009-01-20 Online:2009-01-20

摘要: 为在炭/炭复合材料表面制备C/SiC浓度梯度高温抗氧化涂层,预先用料浆涂刷-高温处理工艺在其表面制备了预炭层.借助XRD、Raman和SEM等测试手段对所制备预炭层的组织结构和微观形貌进行了表征,讨论了不同的原料配比和炭化温度对预炭层结构的影响,并对预炭层与基体的结合性能进行了测定.研究结果表明:制备的预炭层结构致密,与基体具有较好的结合性能,其结合强度可达10.95MPa.不同的原料配比和炭化温度影响了炭层序态结构的形成,最终形成了不同结构的预炭层.

关键词: 炭/炭复合材料, 预炭层, 抗氧化涂层

Abstract: Pre-coated carbon layers on the surface of carbon/carbon composites were prepared firstly by slurry and high-temperature treatment for preparing the anti-oxidation coating with SiC concentration gradient. The micrographs and microstructures of the pre-coated carbon layer were characterized by SEM, Raman and XRD. The effects of different graphite content and carbonization temperature on the microstructure of pre-coated carbon layer were investigated. The bonding strength between the carbon layer and the C/C composites was also measured. The results show that the as-prepared carbon layer is dense and the bend strength reaches 10.5MPa. The structures of the pre-coated carbon layer are influenced by the graphite content and carbonization temperature, and the pre-coated carbon layers with different structures are obtained.

Key words: carbon/carbon composites, pre-coated carbon layer, oxidation protective coating

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