Oxidation protective MoSi2-Mo5Si3/SiC multi-coatings for carbon/carbon composites were prepared by chemical vapor reaction and slurry-sintering method. The influence of preparation technology on the structure and phase composition of the coating was investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) analyses, and then their relationship was discussed. The results indicate that the Si/Mo ratio of the slurry and sintering processing were two main factors that significantly affected the structure and phase composition of the multi-coating. Appropriate sintering process and relatively high Si/Mo ratio were essential for preparing the multi-coating with dense structure and favorable phase composition. After being sintered at 1723 K for 2 h and with the Si/Mo ratio of the slurry being 4.5 (weight ratio), a dense structure accompanied by favorable phase composition of the coating can be obtained. When heat treated at 2373 K for 1 h, this coating became more compact and continuous. Oxidation tests (performed at 1623 and 1823 K) demonstrated that both of these two obtained multi-coatings exhibited better anti-oxidation property than single layer SiC coating.
参考文献
| [1] | |
| [2] | Q.G. Fu, H.J. Li, X.H. Shi, K.Z. Li and G.D. Sun: Scripta Mater., 2005, 52(5), 923.[2] S. Shimada and T. Sato: Carbon, 2002, 40, 2469. [3] J.I. Kim, W.J. Kim, D.J. Choi, J.Y. Park and W.S. Ryu: Carbon, 2005, 43, 1749.[4] J.F. Huang, X.R. Zeng, H.J. Li, X.B. Xiong and M. Huang: Mater. Lett, 2004, 58, 2627.[5] Y.C. Zhu, S. Ohtani, Y. Sato and N. Iwamoto: Carbon, 1998, 36, 929.[6] S.J. Park and M.K. Seo: Carbon, 2001, 39, 1229.[7] Y.C. Zhu, S. Ohtani, Y. Sato and N. Iwamoto: Carbon, 2000, 38, 501.[8] Z.Q. Yan, X. Xiong, P. Xiao, F. Chen, H.B. Zhang and B.Y. Huang: Carbon, 2008, 46, 149.[9] J.F. Huang, X.R. Zeng, H.J. Li, X.B. Xiong and Y.W. Fu: Carbon, 2004, 42, 1517.[10] L.F. Cheng, Y.D. Xu, L.T. Zhang and X.W. Yin: Carbon, 2000, 38, 1493.[11] L. Snell, A. Nelson and P. Molian: Carbon, 2001, 39, 991.[12] J.F. Huang, H.J. Li, X.R. Zeng, K.Z. Li, X.B. Xiong, M. Huang, X.L. Zhang and Y.L. Liu: Carbon, 2004, 42, 2356.[13] J. Zhao, G. Wang, Q.G. Guo and L. Liu: Fusion Eng. Des, 2007, 82, 363.[14] P.Z. Feng, X.H. Qu, F. Akhtar, X.L. Du, H.S. Islam and C.C. Jia: J. Alloy. Compd, 2008, 456, 304.[15] Z.D. Liu, S.X. Hou, D.Y. Liu, L.P. Zhao, B. Li and J.J. Liu: Surf. Coat. Technol, 2008, 202, 2917.[16]X. Yang, Y.H. Zou, Q.Z. Huang, Z.A. Su, X.F. Wang and M.Y. Zhang: J. Inorg. Mater., 2008, 23(4), 779. (in Chinese)[17] Y.L. Zhang, H.J. Li, Q.G. Fu, K.Z. Li, D.S. Hou and J. Fei: Carbon, 2007, 45, 1130.[18] J. Zhao, L. Liu, Q.G. Guo, J.L. Shi and G.T. Zhai: Mater. Lett, 2006, 60, 1964.[19]X.F. Liu, Q.Z. Huang, Z.A. Su and J.X. Jiang: J. Chin. Ceram. Soc., 2004, 32(7), 906. (in Chinese)[20]X. Yang, Q.Z. Huang, Y.H. Zou, Z.A. Su, Z.Y. Xie, M.Y. Zhang and X. Chang: Acta Chim. Sin., 2008, 66(24), 2742. (in Chinese)[21] M. Patel, J. Subramanyuam and B.V.V. Prasad: Scripta Mater, 2008, 58, 211.[22]B. Pamela: The High-temperature Oxidation Behavior of Mosi2 and MoSi2-based Composites, PhD thesis, Pennsylvania State University, USA, 1997.[23]L.R. Xiao, Z.G. Cai, D.Q. Yi, L. Ying, H.Q. Liu and D.Y. Huang: Trans. Nonferrous Met. Soc. China, 2006, 16, s239. |
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