摘要
利用磁场-超声电沉积技术在铜基体上制备Ni-ZrO2复合镀层。采用扫描电子显微镜、X射线衍射仪、显微硬度计、摩擦磨损试验机和电化学工作站,研究了磁场强度对Ni-ZrO2复合镀层的微观表面形貌、织构组织、纳米粒子含量、显微硬度和电化学性能的影响。结果表明,随着磁场强度的增加,复合镀层ZrO2复合量、显微硬度呈现先增加后减小的趋势,而基体晶粒尺寸和磨损量与之相反。磁场强度为0.4 T时,复合镀层ZrO2复合量为3.96%(质量分数),晶粒尺寸为17.47 nm,显微硬度为420HV。电场与磁场垂直时产生的磁流体力学效应促进了镀层中ZrO2纳米粒子含量,可细化复合镀层基体晶粒,提高复合镀层显微硬度。Ni-ZrO2复合镀层耐磨性能优异,其磨损量和摩擦系数表现最小。同时,根据极化曲线和阻抗曲线分析数据,复合镀层电化学性能最优。
Ni-ZrO2 composite coatings were produced by magnetic field-ultrasonic compound fields-assisted electrodeposition on copper substrate.The effect of magnetic field intensities on the properties on the microstructure,ZrO2 content,microhardness,coefficient of friction,electrochemical polarization curve and impedance curve were investigated using scanning electron microscopy(SEM),X ray diffraction(XRD),microhardness tester,friction and wear test machine and electrochemical workstation,respectively.Results showed that ZrO2 content and microhardness increased firstly and decreased with the increasing of the magnetic field intensities,while the change was opposite on the wear amount and grain size.When the magnetic intensity was 0.4 T,ZrO2 content reached the maximum of 3.96 wt%,the grain size reached the minimum of 17.47 nm,and the microhardness reached the highest value of 420HV.The magnetohydrodynamic(MHD)effect promoted the content of ZrO2 nanoparticles in the composite coatings,refined the grain size and improved the microhardness of Ni-ZrO2 composite coating.Ni-ZrO2 composite coating displayed the superior wear resistance due to the lowest wear loss and friction coefficient in the wear test,where as the best corrosion resistance according to the analyze data of the electrochemical polarization curve and impedance curve.
作者
周绍安
贾卫平
陈伟荣
ZHOU Shaoan;JIA Weiping;CHEN Weirong(School of Mechanical Engineering,Dalian University, Dalian 116622, China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2020年第7期7208-7213,共6页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51741501)
辽宁省自然科学基金计划资助项目(20180550227)。
关键词
磁场电沉积
Ni-ZrO2复合镀层
磁场强度
ZrO2含量
性能
magnetic field electrodepositon
Ni-ZrO2 composite coating
magnetic field intensity
ZrO2 content
property
