| 碳化硅晶须对C/C复合材料表面SiC涂层的影响 |
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| 引用本文： | 谭周建,李军,张翔,李丙菊,褚胜林,廖寄乔. 碳化硅晶须对C/C复合材料表面SiC涂层的影响[J]. 粉末冶金材料科学与工程, 2012, 0(5): 664-668 |
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| 作者姓名： | 谭周建 李军 张翔 李丙菊 褚胜林 廖寄乔 |
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| 作者单位： | 中南大学粉末冶金国家重点实验室;湖南金博复合材料科技有限公司 |
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| 基金项目： | 国家高技术研究发展计划资助项目(2012AA03A207);国家自然科学基金委员会创新研究群体科学基金(51021063)资助项目 |
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| 摘 要： | 以三氯甲基硅烷(CH3SiCl3,MTS)为先驱体原料,采用化学气相沉积法(CVD)在C/C复合材料表面原位生长碳化硅晶须(SiCw)及制备SiC涂层,研究SiCw对SiC涂层微观形貌,织构及力学性能的影响。结果表明:SiCw不仅可促成SiC等轴颗粒的细化、生长完善,裂纹宽度减小、偏转明显,而且可使涂层的织构发生改变;同时,大量的空洞在SiCw处形成,使得内层SiC涂层硬度低于外层,从而导致整个SiC涂层的硬度和弹性模量降低。
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| 关 键 词： | 碳化硅晶须 C/C复合材料 SiC涂层 力学性能 |
Effect of silicon carbide whiskers on SiC coating of C/C composites |
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| TAN Zhou-jian,LI Jun,ZHANG Xiang,LI Bing-ju,CHU Sheng-lin,LIAO Ji-qiao. Effect of silicon carbide whiskers on SiC coating of C/C composites[J]. materials science and engineering of powder metallurgy, 2012, 0(5): 664-668 |
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| Authors: | TAN Zhou-jian LI Jun ZHANG Xiang LI Bing-ju CHU Sheng-lin LIAO Ji-qiao |
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| Affiliation: | 1,2(1.State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;2.Hunan Kingbo Carbon-carbon Composites Co.,Ltd.,Yiyang 413000,China) |
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| Abstract: | The in-situ SiCw(silicon carbide whiskers) and SiC coating were deposited on the surface of carbon/carbon composites by chemical vapor deposition(CVD) using methyltrichlorosilane(MTS) as precursor.The effect of SiCw on the microstructure,texture and mechanic properties of SiC coating was investigated.The results show that well-rounded and fine equiaxial-like SiC particles are promptly formed,the crack width and orientation in the coating are changed,and the texture is adjusted;meanwhile,the hardness of inner-coating of SiC is lower than that of the outer and the lower hardness and lesser elastic modulus of the coating are caused by a great number of cavities in the in-situ SiCwarea. |
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| Keywords: | silicon carbide whisker C/C composite SiC coating mechanical properties |
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