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李江鸿,张红波,熊 翔,肖 鹏,黄伯云.C/C复合材料表面TaC涂层的制备和生成机制[J].稀有金属材料与工程(英文),2009,38(3):496~499.[Li Jianghong,Zhang Hongbo,Xiong Xiang,Xiao Peng,Huang Baiyun.Preparation and Formation Mechanism of TaC Coating on Carbon/Carbon Composites[J].Rare Metal Materials and Engineering,2009,38(3):496~499.]
Preparation and Formation Mechanism of TaC Coating on Carbon/Carbon Composites
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Received:February 19, 2008  
DOI:
Key words: TaC coating  preparation  formation mechanism
Foundation item:国家重点基础研究发展规划(“973”计划)项目(2006CB600908)
Author NameAffiliation
Li Jianghong State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China 
Zhang Hongbo  
Xiong Xiang  
Xiao Peng  
Huang Baiyun  
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Abstract:
      A new technology for preparation of TaC coating on Carbon/carbon composites is reported. TaC was turned from TaO2F·rH2O·TaF5, which was characterized by FITR, XRD and SEM. The morphologies of TaC coating at different temperatures were observed by SEM. At 1200 ℃, the TaC coating shows the particular form. When the heat treatment temperature increased to 1800 ℃, the TaC coating was mainly columnar. The formation mechanism of TaC is that Carbon atom diffuse into Ta2O5 deposit, which is coming from TaO2F·rH2O·TaF5 and reacted into TaC at high temperature. The morphology of TaC coating can be interpreted by the theory of Ta2O5 deposited nucleation