Journal of Inorganic Materials ›› 2011, Vol. 26 ›› Issue (3): 233-238.doi: 10.3724/SP.J.1077.2011.00233

• Research Paper • Previous Articles     Next Articles

Influenceof Chemical Vapor Reaction SiC Coating on Mechanical Properties of C/C Composites

SU Zhe-An, YANG Xin, HUANG Qi-Zhong, HUANG Bai-Yun, ZHANG Ming-Yu, HUANG Yan   

  1. State Key Laboratory of Powder Metallurgy,Central South University, Changsha 410083, China
  • Received:2010-06-01 Revised:2010-07-15 Online:2011-03-20 Published:2011-02-18
  • Supported by:

    973 Program (2006CB600901); National Nature Science Foundation of China (50802115)

Abstract: SiC coatings were prepared on carbon/carbon (C/C) composites by chemical vapor reaction (CVR) method. The structure and morphology of the coating were characterized by XRD, SEM and ED Sanalysis, and the influence of SiC coating and preparation technology on the fracture behavior of the composites were investigated by three point bendingtests. The results show that the flexural strength and maximum fracture displacement of the composites are obvious improved after the coating process.The average flexural strength of carbon/carbon composites is 172.4MPa, while the average flexural strength of the coated composites is 239.8MPa. The improvement of the flexural strength is mainly contributed to the improved interface bonding caused by the vapor diffusion and reaction in the preparation process and the SiC particle reinforcement. Furthermore, the fracture mode ofthe coated composites is not changed and the coated samples also exhibit pseudo-plastic fracture and ductile frature character.

Key words: carbon/carbon composite, anti-oxidation coating, SiC

CLC Number: 

  • TB332