Crack Formation and Distribution of SiC Coating Prepared by CVD on Carbon/carbon Composites

摘要：

　　In order to further study the cracks initiation and distribution mechanism of SiC coating,then optimize the coating structure and composition on surface of C/C composites,CVD method is used to deposit SiC coating on C/C composites and pyrolytic carbon.Through the analysis on the reasons of cracks initiation via SEM,the influence of different kinds of substrates and the toughening of SiC whisker on the cracks initiation and distribution are researched.The results show that the cracks easily form in the area near the defects and sample edge,and the cracks also mainly distribute in the direction which are perpendicular to the first fiber layer.Compared with pyrolytic carbon matrix,cracks on C/C composites matrix are width and numerous,and SiC whisker toughening coating can significantly reduce the number of cracks.

关键词： C/C composites SiC coating Cracks

作者: Junliang Zhua Xiaohong Shi Hejun Li Zibo He

作者单位: C/C Composites Technology Research Center,Key Laboratory of Superhigh Temperature Structural Composite Materials,Northwestern Polytechnical University,Xian 710072,P.R.China

会议类型: 国际会议

会议名称: 2012 Workshop on Inorganic Thin Films and Coatings (2012年无机薄膜与涂层学术研讨会)

会议地点: 桂林

会议语种:英文

页码: 28-31

在线出版日期: 2012-07-16（万方平台首次上网日期，不代表论文的发表时间）