电解转印表面织构的定域性研究  

Investigation on Localization of Electrochemical Pattern Transfer of Surface Texturing

作　　者：钱双庆[1] 曲宁松[1] 朱荻[1] 李寒松[1] 曾永彬[1] 

机构地区：[1]南京航空航天大学江苏省精密与微细制造技术重点实验室,南京210016

出　　处：《纳米技术与精密工程》2011年第2期127-133,共7页Nanotechnology and Precision Engineering

基　　金：国家自然科学基金资助项目(50875129);国家高技术研究发展计划(863计划)资助项目(2009AA04Z302);江苏省自然科学基金资助项目(BK2008043)

摘　　要：研究表明,摩擦副表面织构可以有效地改善表面摩擦学性能.电解转印工艺是加工摩擦副表面织构的有效途径.以加工阵列微坑为例,从电解转印的定域性角度出发,提出了以微坑腐蚀系数作为电解转印定域性的评价指标.根据电场理论,建立了电解转印过程阴阳极间电场理论模型,采用有限元电场分析方法探讨阴阳极间距对电解转印过程中阳极表面电场分布的影响.构建电解转印表面织构试验平台,通过试验研究考察了阴阳极间距和电解加工电压对微坑形貌和腐蚀系数的影响.试验结果表明,阴阳极间距由20μm增加到100μm时,微坑直径由55μm增加到130μm,微坑腐蚀系数由3减小到0.012 5,电解转印的定域性降低.加工电压对电解转印定域性有一定的影响,当其他参数不变,加工电压增加到20 V时,微坑腐蚀系数略有下降,微坑轮廓较为清晰.It has been identified that the surface texturing can improve tribological property and electrochemical pattern transfer is an effective way to generate surface texturing on the frictional surfaces.In this paper,the etch factor was proposed to evaluate the localization in the pattern transfer process.The mathematical model for the interelectrode gap was established based on the electric field theory and the influence of different interelectrode gaps on the electric field distribution was analyzed with finite element method.The experimental system was set up for electrochemical pattern transfer.The effects of the interelectrode gap and the machining voltage on the morphology and etch factor of the micro-dimple were investigated experimentally.The results of electrochemical experiments show that the diameter of micro-dimple rises from 55 μm to 130 μm and the etch factor decreases from 3 to 0.012 5,with drop of the machining localization when the interelectrode gap increases from 20 μm to 100 μm.The machining voltage also influences localization.The etch factor drops a little and the profile of the micro-dimple is much clearer when the voltage is increased to 20 V.

关 键 词：表面织构 电解转印 定域性 腐蚀系数 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]