摘要
采用放电等离子烧结法制备了Mo-12Si-8.5B合金,通过高温真空摩擦磨损试验仪测试Mo-12Si-8.5B合金与SiC配对副在25~1000℃区间内的干摩擦学性能。结果表明:温度对Mo-12Si-8.5B/SiC配对副的摩擦系数和磨损率影响较大,其原因与在不同温度下SiC表面的分解、碳的石墨化以及摩擦副表面生成的氧化物共同作用有关,在600℃时Mo-12Si-8.5B合金的摩擦系数达到最小值,为0.36,在800℃时磨损率最小,为0.74×10^(-6)mm^(3)/(N·m)。此外,在25~400℃范围内,Mo-12Si-8.5B合金的磨损机制主要为粘着磨损和剥层磨损,在高温600~1000℃范围内,则以粘着磨损和氧化磨损为主。
Mo-12Si-8.5B alloy was prepared by spark plasma sintering method,and the dry friction and wear properties of the Mo-12Si-8.5B alloy paired with SiC were tested at 25-1000℃using a high-temperature vacuum friction and wear tester.The results show that the temperature has a significant influence on the friction coefficient and wear rate of the Mo-12Si-8.5B/SiC friction pairs,which is related to the combination effect of SiC surface decomposition,graphitization of carbon and oxides generated on the friction pair surface at different temperatures.The friction coefficient of the Mo-12Si-8.5B alloy reaches its minimum value of 0.36 at 600℃,and the wear rate is the minimum at 800℃,which is 0.74×10^(-6)mm^(3)/(N·m).In addition,the wear mechanism of the Mo-12Si-8.5B alloy is mainly adhesive wear and peeling wear within the range of 25-400℃,while in the high temperature range of 600-1000℃,it is mainly adhesive wear and oxidation wear.
作者
胡华荣
郭源君
颜建辉
欧宝立
陈芳
HU Hua-rong;GUO Yuan-jun;YAN Jian-hui;OU Bao-li;CHEN Fang(School of Mechanical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Provincial Key Defense Laboratory of High Temperature Wear Resisting Materials and Preparation Technology,Hunan University of Science and Technology,Xiangtan 411201,China;School of Physics and Electronic Science,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2023年第9期87-93,共7页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(52175167)
湖南省教育厅项目(22C0259)。
