铜镀层对石墨-铜复合材料摩擦磨损性能的影响  

Effect of copper plating on friction and wear properties of graphite-copper composites

作　　者：舒鑫 刘洋赈 曾大海 李卫 SHU Xin;LIU Yang-zhen;ZENG Da-hai;LI Wei(Institute of Advanced Wear-resistant Corrosion and Functional Materials,Jinan University,Guangzhou 510632,China;Henan University of Science and Technology High-end Bearing Tribology Technology and Application National Local Joint Engineering Laboratory,Luoyang 471023,China)

机构地区：[1]暨南大学先进耐磨蚀及功能材料研究院,广东广州510632 [2]河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室,河南洛阳471023

出　　处：《材料热处理学报》2021年第12期142-150,共9页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(U1804252);广东省基础与应用基础研究基金(2020A1515111067);河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室开放课题(202104)。

摘　　要：通过在石墨表面镀铜预处理获得Cu包覆的石墨粉末,并以电解铜粉、鳞片石墨粉和Cu包覆石墨粉末为原料,利用ZT-40-20Y真空热压烧结炉制备了鳞片石墨-铜和镀铜石墨-铜复合材料,随后在不同载荷(5、7、9和11 N)下对复合材料进行往复摩擦磨损试验,研究两种复合材料的微观结构、力学性能和不同载荷下的摩擦磨损性能。结果表明:在相同的制备条件下,镀铜石墨有效地改善了镀铜石墨-铜复合材料中C、Cu之间润湿性的问题,使得其致密度、硬度显著提高;在相同的摩擦条件下,镀铜石墨-铜复合材料平均摩擦系数略有提高、而磨损率显著降低,表现出优良的耐摩擦磨损性能;在不同载荷下的往复摩擦试验中,鳞片石墨-铜复合材料主要磨损机制为磨粒磨损、剥落磨损和粘着磨损;而镀铜石墨-铜复合材料主要的磨损机制为磨粒磨损和少量剥落磨损。Cu-coated graphite powders were obtained by copper plating on the graphite surface.Using electrolytic copper powders,flake graphite powders and Cu-coated graphite powders as raw materials,flake graphite-copper and copper-coated graphite-copper composites were prepared by ZT-40-20 Y vacuum hot pressing sintering furnace.The reciprocating friction and wear tests of the composites were carried out under different loads(5,7,9 and 11 N),and microstructure,mechanical properties and friction and wear properties under different loads of the two composites were studied.The results show that under the same preparation conditions,copper-coated graphite effectively improves the wettability between C and Cu in the copper-coated graphite-copper composites,and significantly improves its density and hardness.Under the same friction conditions,the average friction coefficient of the copper-coated graphite-copper composites increases slightly,while the wear rate decreases significantly,showing excellent friction and wear resistance.In the reciprocating friction tests under different loads,the main wear mechanisms of the flake graphite-copper composites are abrasive wear,spalling wear and adhesive wear,and the main wear mechanisms of the copper-coated graphite-copper composites are abrasive wear and a small amount of spalling wear.

关 键 词：C/CU复合材料 耐磨性 磨损机制 粉末冶金 化学镀铜 

分 类 号：TG174.44[金属学及工艺—金属表面处理]