超声功率对多场耦合作用下脉冲电沉积Ni-ZrO2纳米复合镀层性能的影响  

Effects of Ultrasonic Power on the Performance of Pulse-electrodeposited Ni-ZrO2 Nanocomposite Coating Under Magnetic-Ultrasonic Fields Coupling Action

作　　者：贾卫平 吴蒙华[2] 贾振元[1] 董桂馥[2] 李晓鹏 周绍安[2] JIA Weiping;WU Menghua;JIA Zhenyuan;DONG Guifu;LI Xiaopeng;ZHOU Shao’an(Mechanical Engineering College,Dalian University of Technology,Dalian 116024,China;Mechanical Engineering College,Dalian University,Dalian 116622,China)

机构地区：[1]大连理工大学机械工程学院,大连116024 [2]大连大学机械工程学院,大连116622

出　　处：《材料导报》2020年第2期2017-2022,共6页Materials Reports

基　　金：国家自然科学基金(50975034;51741501);辽宁省自然科学基金(20180550227)~~

摘　　要：超声作为解决纳米粒子团聚的有效方法之一,将其引入到磁场-脉冲电沉积中,在磁场-超声耦合作用下脉冲电沉积成功制得了Ni-ZrO2纳米复合镀层。本工作系统地研究了超声功率对Ni-ZrO2纳米复合镀层表面形貌、ZrO2含量、组织结构、显微硬度、耐磨性、耐蚀性能的影响。结果表明,未施加超声时,镀层中ZrO2含量为6.43%(质量分数),显微硬度为384HV。超声功率从0W增大到320 W时,复合镀层的性能呈先上升后下降的趋势。当超声功率为240W时,Ni-ZrO2纳米复合镀层表面平整致密,晶粒细化,镀层中ZrO2含量为15.2%(质量分数),显微硬度为494HV,磨损后的表面较光滑,并具有良好的耐蚀性。As one of effective means to alleviate the nanoparticles agglomeration,ultrasonic horn was applied to the magnetic field-pulse electrodeposition apparatus,and Ni-ZrO2 nanocomposite coatings were successfully produced under magnetic-ultrasonic fields coupling action.The aim of this study was to investigate the effects of ultrasonic power on the surface morphology,ZrO2 content,microstructure,microhardness,wear resistance and corrosion resistance of Ni-ZrO2 nanocomposite coating.Results showed that ZrO2 content and microhardness in the composite prepared by no-ultrasonic magnetic field-pulse electrodeposition were 6.43wt%and 384HV,respectively.After applying ultrasonic power from 0 W up to 320 W,ZrO2 content and microhardness increased firstly and then decreased.Under ultrasonic power of 240 W,SEM and EDS results indicated that the Ni-ZrO2 composite coating displayed a fine and compact surface structure whereas the ZrO2 content in composite coating was 15.2wt%,and the composite coating displayed the highest microhardness of 494HV than the other coatings.The worn surface morphology was smooth with only a few of grains worn and the Ni-ZrO2 nanocomposite coating showed the best corrosion resistance according to the results of surface morphology and Tafel curves in 4%NaCl solution.

关 键 词：电沉积 磁场-超声耦合作用 超声波 Ni-ZrO2纳米复合镀层 性能 

分 类 号：TQ153.1[化学工程—电化学工业]