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

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中文摘要：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。

外文标题：Effects of Test Temperature on the Microstructure and Tribological Properties of Graphite and Carbon-Carbon Composites

外文摘要：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.

外文关键词：

carbon-carbon compositesgraphitetest temperaturemicrostructurefrictional property

作者：

马玉钦、王浩、李飞、张育洋、王刚锋、史妍妮、王英皓

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作者单位：

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

西安电子科技大学机电工程学院,陕西西安 710071

西安建筑科技大学机电工程学院,陕西西安 710055

关键词：

碳-碳复合材料石墨测试温度微观组织摩擦性能

基金：

公共大数据国家重点实验室开放基金长安大学中央高校基本科研业务费专项资金陕西省自然科学基础研究计划面上项目教育部产学合作协同育人项目河南省高等学校重点科研项目

项目编号：

PBD 2022-0193001022531052022JM-26522050629813340723A460033

出版年：

2024

复旦学报(自然科学版)

复旦大学

复旦学报(自然科学版)

CSTPCD北大核心

影响因子：0.388

ISSN：0427-7104

年,卷(期)：2024.63(2)

参考文献量26