热处理对超临界电沉积Co-Ni-P合金薄膜的摩擦学与电化学腐蚀性能影响研究  

Influence of Annealing on Tribological and Electrochemical Properties of Co-Ni-P Coating Produced by Supercritical Fluid-assisted Electrodeposition

作　　者：侯柏林 刘灿森[2] 苏峰华[2] HOU Bolin;LIU Cansen;SU Fenghua(City College of Huizhou,Huizhou Guangdong 516025,China;School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou Guangdong 510641,China)

机构地区：[1]惠州城市职业学院,广东惠州516025 [2]华南理工大学机械与汽车工程学院,广东广州510641

出　　处：《润滑与密封》2022年第1期30-36,共7页Lubrication Engineering

基　　金：广东省自然科学基金项目(2021A1515012266)。

摘　　要：采用超临界二氧化碳(S-CO_(2))辅助电沉积及后续热处理(200~600℃)制备钴-镍-磷(Co-Ni-P)三元合金涂层,热处理时间为1 h。研究不同热处理温度对超临界电沉积制备的Co-Ni-P三元合金涂层的微观形貌、相结构、硬度、摩擦学性能和电化学腐蚀性能的影响。结果显示:超临界CO_(2)电沉积制备的Co-Ni-P三元合金呈现非晶结构,但经过400℃热处理后由非晶结构转变为晶体结构;Co-Ni-P涂层的硬度随着热处理温度增加先升高后降低,当热处理温度为400℃时,表面硬度最高,约为780 HV。摩擦学和电化学腐蚀性能测试显示:热处理对Co-Ni-P薄膜的平均摩擦因数影响较小,处理前后合金涂层的平均摩擦因数均为0.12左右;但热处理显著影响Co-Ni-P合金薄膜的耐磨性能和电化学腐蚀性能,其磨损率和腐蚀速率随着热处理温度升高先减少后增加;当热处理温度在300和400℃时,Co-Ni-P合金分别呈现最低的磨损率和最好的耐腐蚀性能。Cobalt-Nickel-Phosphorus(Co-Ni-P)coatings were electrodeposited in emulsified supercritical carbon dioxide bath and subsequently annealed at 200℃to 600℃for 1 h.Effects of annealing temperature on the morphology,phase structure,microhardness,tribological properties and electrochemical corrosion behaviors of the Co-Ni-P coatings were evaluated.Results show that the Co-Ni-P coatings display an amorphous structure and the transition from amorphous to nanocrystalline structure occurs after the Co-Ni-P coatings are annealed at 400℃.Microhardness of the Co-Ni-P coatings first increases and then decreases with the increase of annealing temperature,and the maximum microhardness of 780 HV is obtained at 400℃.The Co-Ni-P coatings,regardless of heat treatment or not,display an average friction coefficient of about 0.12.However,the wear resistance and electrochemical corrosion behaviors are greatly affected by the annealing temperature.The wear rate and corrosion rate of Co-Ni-P coatings first decrease and then increase with the increasing of the annealing temperature.The lowest wear rate and corrosion rate are achieved by annealing the Co-Ni-P coatings at 300℃and 400℃,respectively.

关 键 词：Co-Ni-P合金涂层 超临界电沉积 热处理 摩擦磨损 电化学腐蚀 

分 类 号：TH117.1[机械工程—机械设计及理论]