Ni-P化学镀层微观结构的研究  

Microstructure of Ni-P Chemical Coating Layer

作　　者：任旭芳[1] 刘玉先[1] 

机构地区：[1]山东工业大学,济南250061

出　　处：《物理测试》1998年第1期8-10,共3页Physics Examination and Testing

摘　　要：用透射电镜、能谱仪及Ｘ射线衍射法研究了４５钢化学沉积Ｎｉ－Ｐ镀层的微观结构。结果表明，镀态样品全部为非晶态，４００℃晶化后，镀层由过饱和的Ｎｉ固溶体与ｉ３Ｐ以及少量的Ｎｉ７Ｐ３、Ｎｉ２Ｐ组成。Ｎｉ３Ｐ呈粒状，其尺寸在１０～８０ｎｍ范围内。Ｎｉ３Ｐ与Ｎｉ固溶体之间的取向关系为（２１０）Ｎｉ３Ｐ〃（１１１）Ｎｉ，Ｂｉ固溶体中Ｐ的固溶浓度随晶粒尺寸减小而降低在２．２％～３．２％。The microstructure of Ni-P chemical deposited coating layer on 45 steel has been studied using TEM,EDAX and X-ray diffraction method. The results show that coated specimens are all non-crystalline. After crystallization at 400 ℃, the coating layer consists of post-saturated Ni solution, Ni3P and a small amount of Ni7P3,Ni2P,Ni3P is small particle,with its size between 10-80nm. The orientation relationship between Ni3P and Ni solution is (210)Ni3P//(111)Ni.The P concentration in Ni solution is 2. 2% - 3. 2%,12 to 18 times equlibrium concentration, and is decreased with the decrease of grain size. Ni-P coating layer has higher hardness and good wear resistance.

关 键 词：NI-P 微观结构 化学镀 镀层 

分 类 号：TQ153.12[化学工程—电化学工业]