化学复合镀中金刚石颗粒的分散对复合镀层性能的影响  

Effect of dispersion of diamond particles on the performance of electroless composite deposit

作　　者：朱昌洪[1] 朱永伟[1] 陈拥军[1] 惠骏[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《电镀与涂饰》2010年第12期19-24,共6页Electroplating & Finishing

基　　金：江苏省材料摩擦学重点实验室开放基金(kjsmcx0901)

摘　　要：通过数值仿真,研究了镀槽结构与搅拌速率对镀液流场和镀液中金刚石颗粒分布特性的影响,并制备了镍–磷–金刚石复合镀层,研究了镀槽结构与搅拌速率对镀层中金刚石含量、粒径分布以及镀层显微硬度和耐磨性的影响。结果表明,镀槽中添加挡板和提高搅拌速率,可以明显改善镀液流场的均匀性,有利于金刚石颗粒在镀液与镀层中的分散与均匀分布,显著提高复合镀层的显微硬度与耐磨性;当镀槽中有挡板、搅拌速率为600 r/min时,所制备的微米金刚石–镍–磷复合镀层经400°C热处理1 h后,显微硬度高达1 442 HV,镀层几乎无磨损。The influence of plating tank structure and stirring rate on the performance of bath flow field and dispersion of diamond particles was studied by numerical simulation method.A Ni-P-diamond composite deposit was prepared,and the effects of plating tank structure and stirring rate on the content and particle size distribution of diamond in the deposit and its microhardness and wear resistance were studied.Results indicated that adding bafflers and increasing the stirring rate are beneficial to the uniformity of bath flow field and the distribution of diamond both in bath and in deposit,greatly improving the microhardness and wear resistance of the composite deposit.When the stirring rate is 600 r/min and there are bafflers in plating tank,the composite deposit exhibits the best wear resistance with a micro-hardness of 1 442 HV after heat treatment at 400 °C for 1 h.

关 键 词：化学复合镀 镍–磷合金 金刚石 耐磨性 数值仿真 

分 类 号：TG174.4[金属学及工艺—金属表面处理]