摘要
用冷压烧结粉末冶金法制备了铜-10%石墨复合材料;对复合材料进行了拉伸、冲击试验;用SEM、电滑动磨损试验机等分析了材料的断口形貌和载流摩擦磨损性能,探讨了其磨损机理。结果表明:由于铜-10%石墨复合材料中石墨含量较高,该材料的拉伸断裂为脆性断裂;在非载流条件下,试样的磨损量随着试验载荷、滑动速度的增加而增大;载流30 A条件下,由于电流产生大量的电弧热促进了石墨的润滑作用,与非载流相同磨损条件结果相比摩擦因数降低、磨损量减小。
Copper-10%graphite composites were prepared by means of cold pressure sintering powder metallurgy method.Tensile and impact tests were carried out to gain the mechanical properties of the composites,and scanning electron microscope(SEM) and electrical sliding wear tests were used to analyze the fracture appearance and wear properties of the composites.The results indicate that the tensile fracture appeared brittleness because of the high graphite content.Under non-current carrying condition,the wearing loss...
出处
《机械工程材料》
CAS
CSCD
北大核心
2008年第12期76-78,81,共4页
Materials For Mechanical Engineering
基金
国家重点基础研究发展计划(973)资助项目(2007CB714704)
国家自然科学基金资助项目(50771073)
教育部新世纪优秀人才支持计划资助项目(NCET-05-0388)
关键词
铜/石墨复合材料
受电靴
载流磨损
copper-graphite composite
collector shoe
electrical sliding wear
