摘要
研究了高温热处理工艺对快速定向扩散化学气相渗透炭/炭复合材料在湿态下的摩擦磨损性能的影响。实验选择了4种不同的高温热处理工艺,用于比较其对炭/炭复合材料微观结构及湿态下的摩擦磨损性能的影响。分析结果表明湿度对炭/炭复合材料的摩擦性能有显著的影响,在湿态下它的摩擦系数明显低于正常干态下的摩擦系数并且随着刹车压力和刹车惯量的增加下降得更快;高温热处理工艺对炭/炭复合材料微观结构有显著影响,通过改变炭/炭复合材料微观结构,适当的高温热处理工艺可以改善湿态下炭/炭复合材料摩擦磨损性能。结果表明,最适合的热处理温度为2000℃,在2000℃下热处理的炭/炭复合材料有足够的摩擦系数,并且湿度对其摩擦磨损性能影响较其他3种热处理工艺的炭/炭复合材料小。
The influence of high temperature treatment on the tribological behavior of carbon/carbon composites deposited by rapid directional diffusion (RDD) chemical vapor infiltration (CVI) under wet condition has been investigated. Four different processes for high temperature treatment were tested and compared with each other. The results indicate that the friction behaviors of C/C composites are strongly affected by the environment wetness, and their friction coefficients (FC) under wet conditions is lower than that under dry conditions and decrease further with increasing the brake specific pressure and moment of inertia. The microstructures of carbon/carbon composites were regulated during high temperature heat treatment, which help to ameliorate tribological properties of carbon/carbon composites under wet conditions. The most suitable heat treatment temperature for the C/C composite material is 2 000 ℃ . The composites treated at 2 000 ℃ have good friction coefficients that are high enough for practical uses, on which the effect of humidity is less in comparison to other composites treated under different conditions.
出处
《炭素技术》
CAS
CSCD
2003年第6期17-22,共6页
Carbon Techniques
关键词
炭/炭复合材料
湿态环境
摩擦磨损性能
摩擦系数
Carbon/carbon composites
wet condition
frictional properties
friction coefficients
