摘要
采用冷压成型和热等静压烧结技术制备了20%C/Cu复合材料,研究了它在干摩擦条件下的载流摩擦磨损性能,并分析了它的磨损机理。结果表明:随着载荷增加,载流和非载流条件下的磨损率均逐渐增大,第三体的形成使摩擦因数不断降低;随着滑动速度增大,载流和非载流条件下的摩擦因数呈微小的上升趋势,磨损率则先增大后降低;载流条件下复合材料的摩擦因数和磨损率比非载流时的均有所下降,载流条件下第三体的润滑作用加强,提高了材料的耐磨性;复合材料的磨损过程中存在黏着磨损、磨粒磨损和剥层磨损,且在磨损表面上并未发现电弧烧蚀的痕迹。
20%C/Cu composite was prepared by cold pressing and hot isostatic pressing sintering technology, its friction and wear properties with electrical current were studied and its wear mechanism was analyzed. The results show that wear rate with and without electrical current both increased with the increase of load, and the friction coefficient decreased because of the formation of third bodies. With the increase of sliding velocity, friction coefficient with and without electrical current both increased slightly, but the wear rate increased first and then decreased. The friction coefficient and wear rate with electrical current were lower than that without electrical current. Due to the strengthening of lubrication of third bodies under electrical current, the wear resistance of the composite was improved. There were adhesive wear, abrasive wear and delamination wear during wear, and arc erosion was not he found on the worn surface.
作者
李杨绪
朱德贵(指导)
彭旭
周加敏
LI Yang-xu ZHU De-gui PENG Xu ZHOU Jia-min(Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China)
出处
《机械工程材料》
CAS
CSCD
北大核心
2016年第11期81-87,共7页
Materials For Mechanical Engineering
基金
四川省成果转化平台建设项目(2014GPTZ0002)
关键词
热等静压
铜/石墨复合材料
载流磨损
第三体
hot isostatic pressing
copper/graphite composite
wear with electrical current
third body
