张伟一,杜云慧,王玉洁,朱 宇,陆 钦,张 鹏.微弧氧化膜层的组分质量比率、结构与性能[J].稀有金属材料与工程,2021,50(1):311~319.[zhang weiyi,du yunhui,wang yujie,zhu yu,lu qin,zhang peng.Component Mass Ratio, Microstructure and Performance of Micro-arc Oxidation coating[J].Rare Metal Materials and Engineering,2021,50(1):311~319.]
微弧氧化膜层的组分质量比率、结构与性能
投稿时间:2020-02-06  修订日期:2020-03-12
中文关键词:  微弧氧化膜层  复合电介质顺序放电  微观组织  性能
基金项目:大学生创新创业训练计划资助项目(202010004006);国家自然科学(50974010);北京市自然科学(2162036)
中文摘要:
      为了同时提高AZ61的MgF2+MgO微弧氧化膜层的电化学腐蚀与磨损性能,本文运用复合电介质顺序放电学术思想,通过减弱击穿熔体的喷发,使膜层进一步致密,进而使其性能得到提高。膜层的MgF2-MgO质量比率α、微观组织、电化学腐蚀与磨损性能的研究结果表明:α=1.2时,减弱击穿熔体喷发的效果显著好于α=0.1和11.8,膜层的内部致密层厚度可提高到3.6 μm,是现有微弧氧化膜层的3倍,外部疏松层的阻抗可提高到13555 Ω cm2,比α=0.1和11.8的大30%。该膜层可将AZ61的自腐蚀电压Ecorr由-1.912提高到-0.455 VSCE、自腐蚀电流Icorr由378.6减小到0.453(10-6 A/cm2)、磨损率由921降低到0.5(10-5 mm3/N.m)。本研究为制备高性能微弧氧化膜层提供了一种新模式。
Component Mass Ratio, Microstructure and Performance of Micro-arc Oxidation coating
英文关键词:micro-arc oxidation coating  composite dielectric ordinal discharge  microstructure  performance
英文摘要:
      In order to improve the electrochemical corrosion and wear performance of MgF2+MgO MAO (micro-arc oxidation) coating on AZ61 simultaneously, composite dielectric ordinal discharge thought was used to weaken the eruption of breakdown melt and hence densify the coating and enhance its performance. α (MgF2-MgO mass ratio), microstructure, electrochemical corrosion and wear performance of coatings were investigated. The results show that the weakening effect on eruption of breakdown melt for coating with α=1.2 is obviously better than that with α=0.1 and 11.8. The thickness of inner dense layer is thickened to 3.6 μm, which is about three times as thick as that of the existing MAO coating. The impedance of outer loose layer is enhanced to 13555 Ω cm2, which is about 30% larger than that of α=0.1 and 11.8. Ecorr (corrosion potential) of AZ61 is increased from -1.912 to -0.455 VSCE, Icorr (corrosion current density) is decreased from 378.6 to 0.453 (10-6 A/cm2) and the wear rate is reduced from 921 to 0.5 (10-5 mm3/N.m) by this densified micro-arc oxidation coating. This investigation provides a novel processing mode for outstanding MAO coating.
作者单位E-mail
张伟一 北京交通大学 17221329@bjtu.edu.cn 
杜云慧 北京交通大学  
王玉洁 北京交通大学  
朱 宇 北京交通大学  
陆 钦 北京交通大学  
张 鹏 北京交通大学  
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