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

doi:10.3724/SP.J.1077.2011.00233

Abstract

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

SU Zhe-An, YANG Xin, HUANG Qi-Zhong, HUANG Bai-Yun, ZHANG Ming-Yu, HUANG Yan. Influenceof Chemical Vapor Reaction SiC Coating on Mechanical Properties of C/C Composites[J]. Journal of Inorganic Materials, 2011, 26(3): 233-238.

References

[1] Vignoles G L, Lachaud J, Aspa Y, et al. Ablation of carbon-based materials: Multiscale roughness modelling. Composites Science and Technology, 2009, 69(9):1470-1477.
[2] 张雨雷, 李贺军, 姚西媛, 等(ZHANG Yu-Lei, et al). C/SiC/Si-Mo-Cr复合涂层碳/碳复合材料力学性能研究. 无机材料学报(Journal of Inorganic Materials), 2008,23(4):725-728.
[3] Li H J, Fu Q G, Shi X H, et al.SiC whisker-toughened SiC oxidation protective coating for carbon/carbon composites. Carbon, 2006,44(3):602-605.
[4] Fu Q G, Li H J, Shi X H, et al.Microstructure and anti-oxidation property of CrSi₂-SiC coating forcarbon/carbon composites. Applied Surface Science, 2006,252(10):3475-3480.
[5] Yang X, Zou Y H, Huang Q Z, et al. Improved oxidation resistance of chemical vapor reaction SiC coating modified with silica for carbon/carbon composites. J. Cent. South Univ. T, 2010, 17(1):1-6.
[6] Fu Q G, Li H J, Shi X H,et al.Silicon carbide coating to protect carbon/carbon composites against oxidation.Scripta Materialia, 2005,52(9):923-927.
[7] Wu S J, Cheng L F, Zhang L T, et al. Oxidation behavior of 2D C/SiC with a multi-layer CVD SiC coating. Surface and Coatings Technology, 2006,200(14/15): 4489-4492.
[8] Hiroshi H, Takuya A, Yasuo K, et al. High-temperature oxidation behavior of SiC-coated carbonfiber-reinforced carbon matrix composites. Composites:Part A, 1999,30(4):515-520.
[9] Huang J F, Zeng X R, Li H J,et al. Influence of the preparation temperature on the phase, microstructure and anti-oxidation property of a SiC coating for C/C composites.Carbon, 2004,42(8/9):1517-1521.
[10]Zhao J, Wang G, Guo Q G, et al. Microstructure and property ofSiC coating for carbon materials. Fusion Engineering and Design, 2007,82(7): 363-368.
[11]Friedrich C, Gadow R, Speicher M. Protective multilayer coatings for carbon-carbon composites. Surface and Coatings Technology, 2002,151 - 152(3):405-411.
[12]Choy K L. Chemical vapour deposition of coatings. Progress in Materials Science, 2003,48(2):57-170.
[13]Yang X, Huang Q Z, Zou Y H,et al. Anti-oxidation behavior of chemical vapor reaction SiC coatings on different carbon materials at high temperatures. Trans. Nonferrous Met. Soc. China, 2009, 19(5):1044-1050.
[14]Xiao L R, Yi D Q, Yin L, et al .Morphology and structure of high temperature MoSi₂coating on niobium. Trans. Nonferrous Met. Soc. China, 2005,15(1):18-22.
[15]杨鑫, 黄启忠, 邹艳红, 等(YANG Xin,et al). 化学气相反应法制备不同碳基体表面SiC涂层组织结构分析. 化学学报(Acta Chim Sinica), 2008,66(24):2742-2748.
[16]Thomas C R. Essentials ofCarbon-carbon Composites. Cambridg: The Royal Society of Chemistry, 1993: 214-216.
[17]Kowbel W, Withers J C, Ransone P O. CVD and CVR silicon-based functionally gradient coatings on C-C composites. Carbon, 1994,33(4):415-426.
[18]Tang S F, Deng J Y, Liu W C, et al. Mechanical and ablation propertiesof 2D-carbon/carbon composites pre-infiltrated with a SiC filler. Carbon,2006,44(14):2877-2882.
[19]张晓虎, 李崇俊, 崔红, 等. 致密工艺对炭布增强2D-C/C复合材料力学性能的影响. 新型炭材料, 2001,16(4):36-39.