Influence of SiC whisker on formation and oxidation resistance of coating for C/C composite
To protect carbon/carbon (C/C) composite against oxidation,a SiC/Si/MoSi2 anti-oxidation coating was preparated on C/C composite by embedding with the powder mixture of Si,C and MoSi2 at 1600℃ in argon atmosphere.In order to investigate the effection of SiC whisker on formation and oxidation resistance of coating,SiC whisker was introduced to coatings by pyrolysis of hydrogen silicone oil (H-PSO) at 1600℃ before embedding treatment.Oxidation experiment was carried out in the static air at 1400℃ for 2h,and thermal cycling between 1400℃ and room temperature for 5 times.Morphology and phase structure of the coating were analyzed by XRD and SEM with EDS.The anti-oxidative mechanism of coating was investigated by comparing the diversity of morphology and phase structure before and after oxidation.The research indicates that the introduction of SiC whiskers improves the performance of the coating effectively.It can effectively decrease the cracking of the coating in the oxidation process,and avoid the excessive penetration of silicon to protect the matrix from being excessively corrosion.
C/C composites anti-oxidation coating oxidation resistance
Yang Chen Chengguo Wang Wei Zhao
Carbon Fibre Engineering Research Center, Faculty of Materials Science, Shandong University, Jinan 250061, China
国际会议
厦门
英文
373-377
2012-01-04（万方平台首次上网日期，不代表论文的发表时间）