铝合金表面机械球磨Ni-Al-Mo复合涂层的制备及其摩擦特性研究  

Tribological properties of Ni-Al-Mo composite coating on Al alloy surface preparation by mechanical milling

作　　者：陈玲玲 闫成旗 CHEN Ling-ling;YAN Cheng-qi(School of Aeronautical Engineering, Anyang Institute, Anyang 455000, China;School of Mechanical Engineering, Anyang Institute of Technology, Anyang 455000, China)

机构地区：[1]安阳学院航空工程学院,河南安阳455000 [2]安阳工学院机械工程学院,河南安阳455000

出　　处：《兰州理工大学学报》2022年第1期8-13,共6页Journal of Lanzhou University of Technology

基　　金：河南省高等学校重点科研项目(20A880002)。

摘　　要：通过机械球磨方法在铝合金表面制备了Ni-Al-Mo复合涂层,对涂层微观组织、组成成分和摩擦学性能等进行了分析.结果表明:经过7 h机械球磨制备的Ni-Al-Mo复合涂层内元素均匀分布;550℃退火后涂层中均有Al_(3)Ni金属间化合物新相生成;复合涂层中Al_(3)Ni和Mo的存在使得涂层硬度高于铝合金基体和Ni-Al涂层,Mo添加质量分数为10%、20%和30%时涂层硬度随Mo含量的增加而增大,分别约为105、125、167 HV;涂层硬度的增大有效降低了涂层磨损率,三种涂层的磨损率约为0.4×10^(-3)~0.6×10^(-3)mm^(3)/(N·m);复合涂层优异的摩擦系数和磨损率有效保护了铝合金基体.Ni-Al-Mo composite coating was prepared on surface of aluminum alloy by the method of mechanical milling.And the microstructure of coating,composition and tribological properties of the coating were analyzed.The result show that the elements in the Ni-Al-Mo composite coating are evenly distributed after 7 h mechanical ball milling.After annealing at 550℃,new phases of Al3Ni intermetallic were formed in the coating.The presence of Al3Ni and Mo in the composite coating makes the coating hardness higher than that of aluminum alloy substrate and Ni-Al coating,the coating hardness increases with the increase of Mo content,and that is respectively about 105 HV,125 HV and 167 HV at the addition amount of 10%,20%and 30%;The increase of coating hardness effectively reduces the wear rate,and the wear rate of the coating is about 0.4×10^(-3)~0.6×10^(-3)mm^(3)/(N·m);The excellent friction coefficient and wear rate of the composite coating effectively protect the aluminum alloy matrix.

关 键 词：机械球磨 铝合金 复合涂层 摩擦学性能 

分 类 号：TG495[金属学及工艺—焊接]