(中南大学 粉末冶金国家重点实验室, 长沙 410083)
摘 要: 为了改善航空刹车副用炭/炭复合材料的摩擦磨损性能， 对二维编制C/C复合材料的摩擦机理进行了深入的研究； 对比了试样渗Si后及渗Si前的实验结果， 着重研究了试样不同的渗Si量对摩擦磨损行为及特性的影响。结果发现渗Si的试样比没有渗Si试样摩擦曲线线型好， 并且摩擦试验过程中的振动现象也得到了解决。但摩擦因数随着所生成SiC含量的增加， 由0.35→0.32→0.28呈下降趋势； 磨损量随着所生成SiC含量的增加而增大； 当有大量的不均匀的SiC颗粒生成时， C/C复合材料的摩擦表面将会被剥落, 并从材料的微观性能及摩擦机理方面给予了深入的分析。
关键字: 炭/炭复合材料；熔融渗Si； 摩擦磨损机理； 二维编制
（State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China）
Abstract:In order to improve the friction-wear properties of the C/C composites for aircraft brake pairs, the friction mechanism of two dimension C/C composites was studied deeply. The influence of the different Si smearing thickness on friction properties was investigated. Results show that samples of infiltrating Si are improved in comparasion with no infiltrating Si, such as friction curve, vibration. But the friction coefficient reduces from 0.35 to 0.28 with the increasing of SiC content, the wear increases with the increasing of SiC content. Friction surface of C/C composites has obvious nick, when a lot of SiC is produced. The results is analyzed deeply by C/C composites micro-properties and friction mechanism.
Key words: C/C composite; molting infiltrating Si; friction mechanism; two dimension weaving
