摘要
在复合电解液体系中加入Al_2O_3粉,并引入超声辅助对纯铝基体进行微弧氧化处理,研究了Al_2O_3掺杂与超声辅助对微弧氧化层微观形貌、物相组成、耐腐蚀性能与摩擦磨损性能的影响。结果表明:超声辅助促使更多的Al_2O_3微粒参与微弧氧化过程,形成的微弧氧化层更平整致密,孔洞尺寸较小且分布均匀,孔隙率较低;与未掺杂Al_2O_3或未引入超声辅助形成的微弧氧化层相比,掺杂Al_2O_3和引入超声辅助后微弧氧化层的自腐蚀电流密度明显降低,极化电阻大幅提高,摩擦因数和比磨损率均降低,耐腐蚀性能和摩擦磨损性能都得到显著提高。
Pure aluminum substrate was treated by micro-arc oxidation with the assistance of ultrasonic in a composite electrolyte added with Al2 O3 powder.The effects of Al2 O3 doping and ultrasonic assisting on the microstructure,phase composition,corrosion resistance and friction and wear performance of micro-arc oxidation coating were investigated.The results show that the ultrasonic assisting promoted more Al2 O3 particles to participate in the micro-arc oxidation process.The micro-arc oxidation coating was more smooth and compact with uniformly distributed small pores,and had lower porosity.Comparing with micro-arc oxidation coatings without Al2 O3 doping or ultrasonic assisting,the free corrosion current density of the micro-arc oxidation coating with Al2 O3 doping and ultrasonic assisting was obviously reduced;the polarization resistance increased significantly;the friction coefficient and specific wear rate both decreased.Therefore the corrosion resistance and the friction and wear properties were greatly improved.
作者
王晓云
马一林
田林海
姚晓红
WANG Xiaoyun;MA Yiling;TIAN Linhai;YAO Xiaohong(Research Institute of Surface Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《机械工程材料》
CAS
CSCD
北大核心
2018年第11期52-57,共6页
Materials For Mechanical Engineering
基金
欧盟第七框架玛丽居里行动计划项目(PIIF-GA-2012-327750)
山西省回国留学人员科研资助项目(2016-025)
关键词
纯铝
超声辅助
微弧氧化
Al2O3粉
耐腐蚀性能
摩擦磨损性能
pure aluminum
ultrasonic assisting
micro-arc oxidation
Al2O3 powder
corrosion resistance
friction and wear performance
