中文摘要：

在紫铜基体上分别制备了普通快速铜镀层和纳米Al2O3／快速铜复合刷镀层，采用扫描电镜、金相显微镜、显微硬度计、摩擦磨损实验机对比研究了两种镀层的表面形貌、截面组织形貌、显微硬度和耐磨性。结果表明，纳米Al2O3颗粒的加入显著改变镀层组织形貌与性能。与普通快速铜镀层相比，纳米铜基复合刷镀层表面平整，组织更加细化致密，显微硬度增大，摩擦系数降低，减弱了磨损面的犁削效应和粘着效应，耐磨性优于普通快速铜镀层。

英文摘要：

Traditional Cu coating and Cu/nano-Al2O3 composite coating were prepared respectively with electro- brush plating on pure copper matrix. The surface morphology, section structure, micro-hardness and wear re- sistance of both coatings were determined and comparatively analyzed with canning electron microscope, metal- lographic microscope, digital micro-hardness tester and friction-wear tester. The results showed that, the structure, morphology and properties of Cu/nano-Al2O3 composite coating are changed due to adding nano-Al2O3 particles to the Cu based coating. The surface morphology of Cu/nano-Al2O3 composite coating was more leveling and smooth, the microstructure was more compact, micro-hardness was higher and friction coefficient was lower than that of traditional Cu coating. Cu/nano-Al2O3 coating has strong resistance effects on plough and adhesion wear. The wear resistance of Cu/nano-Al2O3composite coating was superior to that of traditional Cu coating.