机械研磨对镁合金化学镀Ni-P镀层结构及性能的影响  

Effect of mechanical attrition on microstructure and property of electroless plating Ni-P coatings on magnesium alloy

作　　者：平朝霞[1] 杨青[1] 孟辰路[1] 黄思雅[1] 范丽丽[1] 何业东[1] 

机构地区：[1]北京科技大学北京市腐蚀磨蚀和表面技术重点实验室,北京100083

出　　处：《材料热处理学报》2008年第6期130-134,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金项目(50671006);北京科技大学本科生创新基金项目(07030367)

摘　　要：通过在镀液中加入介质小球,进行搅拌,对镁合金化学镀Ni-P过程施加机械研磨作用。结果表明,机械研磨改变了镀层的生长方式,获得的镀层表面光滑、平整,镀层颗粒明显细化,没有孔隙;在机械研磨作用下,镀层发生了由非晶向晶态的转变,形成固溶P的晶态Ni镀层,镀层硬度显著提高。机械研磨化学镀Ni-P镀层在400℃热处理1h,镀层中析出Ni3P相,镀层硬度进一步提高,而且镀层中没有传统化学镀Ni-P镀层热处理后产生的裂纹。镁合金机械研磨化学镀Ni-P镀层的耐磨和耐蚀性能获得显著提高。The mechanical attrition （MA） action was applied in a traditional electroless plating Ni-P process by stirring the plating solution containing ceramic balls. The results show that growth mode of coatings is changed by applying MA and the new coatings show smooth surface morphology, refined grain size and pores-free. Under MA action, the structure of the coatings transforms from amorphous state to crystllized Ni-P solid solution and hardness of the coatings increases obviously. After heat treatment at 400℃ for 1h, Ni3 P phase forms in the coatings with MA action, hardness of the coatings increases further, and no cracks appeared in tranditional Ni-P coatings is observed. Therefore, both of erosion resistance and corrosion resistance of magnesium alloy can be improved effectively by electroless plating Ni-P coating with mechanical attrition.

关 键 词：机械研磨 化学镀 NI-P镀层 

分 类 号：TG174.44[金属学及工艺—金属表面处理]