测试温度对石墨和碳-碳复合材料的微观组织及摩擦磨损性能的影响
Effects of Test Temperature on the Microstructure and Tribological Properties of Graphite and Carbon-Carbon Composites
马玉钦 1王浩 1李飞 2张育洋 3王刚锋 1史妍妮 1王英皓1
作者信息
- 1. 长安大学工程机械学院道路施工技术与装备教育部重点实验室,陕西西安 710064
- 2. 西安电子科技大学机电工程学院,陕西西安 710071
- 3. 西安建筑科技大学机电工程学院,陕西西安 710055
- 折叠
摘要
碳-碳(C-C)复合材料是一种在高温下具有优异机械性能和耐磨特性的材料,已被广泛应用于航空发动机的密封结构.相较于石墨,C-C复合材料在高温环境下可表现出更卓越的耐磨能力.本文通过化学气相渗透和前驱体热解渗透法制备的C-C复合材料可展现出良好的摩擦磨损性能.本研究制备了 C-C复合材料与石墨2种试样,并在25～450 ℃对它们的摩擦磨损性能进行了测试.结果表明:随着测试温度的升高,C-C复合材料的磨损量呈先上升后下降的趋势,而石墨的磨损量逐渐增大;并且C-C复合材料的摩擦系数先减小后增大再减小,而石墨的摩擦系数整体呈增大趋势.在250 ℃时,C-C复合材料的平均磨损率达到最大,其值为12×10-5 g·s-1,石墨的平均磨损率为15×10-5 g·s-1.在450 ℃时,C-C复合材料的平均磨损率仅为5×10-5 g·s-1,石墨的平均磨损率为34×10-5 g·s-1,此条件下C-C复合材料的平均磨损率比石墨降低了近7倍,呈现了其显著的耐磨效果.
Abstract
Carbon-carbon(C-C)composites is a kind of material with excellent mechanical properties and wear resistance at high temperature,and has been widely used in the sealing structure of aircraft engines.Compared with graphite,C-C composites exhibits superior wear resistance at high temperatures.In this paper,the C-C composites prepared by chemical vapor permeation and precursor thermal depermeation showed good friction and wear properties.Two samples of C-C composites and graphite were prepared in this study,and then the friction and wear properties of the two materials were tested in the range of 25-450 ℃.The results show that with the increase of test temperature,the wear of C-C composites increases firstly and then decreases,while the wear of graphite increases gradually,and the friction coefficient of C-C composites decreases firstly and then increases and then decreases,while the friction coefficient of graphite increases as a whole.At 250 ℃,the average wear rate of C-C composites reaches the maximum,and its value is 12×10-5 g·s-1,and the average wear rate of graphite is 15×10-5g·s-1.At 450 ℃,the average wear rate of C-C composites is only 5× 10-5 g·s-1,and the average wear rate of graphite is 34× 10-5 g·s-1,Under this condition,the average wear rate of C-C composite is nearly 7 times lower than that of graphite,showing its remarkable wear resistance.
关键词
碳-碳复合材料/石墨/测试温度/微观组织/摩擦性能Key words
carbon-carbon composites/graphite/test temperature/microstructure/frictional property引用本文复制引用
基金项目
公共大数据国家重点实验室开放基金(PBD 2022-019)
长安大学中央高校基本科研业务费专项资金(300102253105)
陕西省自然科学基础研究计划面上项目(2022JM-265)
教育部产学合作协同育人项目(220506298133407)
河南省高等学校重点科研项目(23A460033)
出版年
2024
NETL
NSTL
万方数据