金刚石的嵌入对其复合镀层的影响分析  

Discussions about Effects of Diamond Incorporation on the Microstructure of Electroplated Ni-Co-diamond Composites

作　　者：李云东[1] 卢汇洋[1] 苏宗伟[1] 丁俊成[1] 

机构地区：[1]河南农业大学机电工程学院,河南郑州450002

出　　处：《表面技术》2007年第5期8-11,共4页Surface Technology

基　　金：河南省自然科学基金项目(0411051300)

摘　　要：金属-金刚石共沉积复合镀层,在不同应用领域(如提高耐磨性、自润滑性、切削性及弥散强化效果等)已得到广泛关注。详述了金刚石的嵌入对复合镀层的影响及其原因。试验发现,金刚石的嵌入恶化了复合镀层胎体的微观结构,使得胎体晶粒粗化、镀层和颗粒结合部出现间隙、镀层表面起伏不平并出现节瘤、沟谷及金刚石颗粒表面的过度包镶等现象。分析发现,以上现象是金刚石晶体内部金属包裹体的磁性,对运动的阳离子产生洛仑兹力作用,从而影响电沉积过程的结果。Electrodeposited diamond composite coatings have been widely studied for improving the hardness, wear resistance and self-lubrication. The detrimental impacts of diamond incorporation on the composites microstructure was reported. It is shown that the incorporation significantly worsens the microstructure, like coarsening the matrix grain, inducing gaps between matrix and diamonds, and promoting emergence of domed nodules, valleys and over-plating eases on the fluctuant matrix surface. All the deterioration facts are believed to arise from metallic inclusions trapped in dia- mond crystals during their synthetic process.

关 键 词：电沉积 复合镀层 Ni-Co-金刚石 显微结构 金刚石磁性 

分 类 号：TQ153.2[化学工程—电化学工业]