镁合金微弧氧化膜层性能优化研究进展  

Research Progress on Performance Optimization of Micro-arc Oxidation Films on Magnesium Alloys

作　　者：张祥 周亮[1] 贾宏耀 冯宴荣 赵李斌 房大庆 ZHANG Xiang;ZHOU Liang;JIA Hong-yao;FENG Yan-rong;ZHAO Li-bin;FANG Da-qing(School of Materials Science and Engineering,Chang'an University,Xi'an 710064,China;Shanxi Yinguang Huasheng Magnesium Co.,Ltd.,Shanxi Wenxi,043800,China;State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]长安大学材料科学与工程学院,西安710064 [2]山西银光华盛镁业股份有限公司,山西闻喜043800 [3]西安交通大学金属材料强度国家重点实验室,西安710049

出　　处：《表面技术》2023年第3期122-133,共12页Surface Technology

基　　金：陕西省重点研发计划(2021GY-244);陕西省自然科学基础研究计划(2021JLM-41);西安交通大学金属材料强度国家重点实验室开放课题(20202204)。

摘　　要：镁合金是一类重要的工程材料,具有许多优良的物理、化学性能,在航空航天、交通运输、电子通信、生物医学和能源等领域具有广阔的应用前景。镁合金的应用受到其高化学活性的限制,需要进行表面处理,以避免腐蚀。在众多表面处理技术中,微弧氧化技术极大地改善了镁合金的综合性能。其中,工艺参数对膜层性能有着重要的影响。在分析微弧氧化膜层厚度、微观结构和相组成成因的基础上,结合国内外研究现状重点阐述了电解质、颗粒添加物、电参数(电流模式、电压、电流密度、占空比、频率和氧化时间)对膜层耐蚀性、耐磨性及生物学性能的影响,并由此引出调控导向性、陶瓷膜增韧、性能匹配优化及能源利用率等关键问题。此外,还探讨了研究者针对上述问题采取的解决方案,并分析了方案的合理性。最后,结合镁合金微弧氧化目前存在的问题对其未来发展进行了展望。Magnesium alloy is an important engineering material with many excellent physical and chemical properties,which has broad application prospects in the fields of aerospace,transportation,electronic communications,biomedicine,energy,etc.However,the application of magnesium alloy is limited by its high chemical activity,so surface treatment is required to avoid corrosion.Micro-arc oxidation(MAO)leads the working area from the Faraday area to the high-voltage discharge area,which overcomes the defects of anodic oxidation and greatly improves the overall properties of magnesium alloys.Based on the research status in China and abroad,the effects of electrolyte,particle additives and electrical parameters(current mode,voltage,current density,duty cycle,frequency and oxidation time)on the corrosion resistance,wear resistance and biological properties of the films were introduced emphatically.Then,key issues such as regulation orientation,ceramic film toughening,performance matching optimization and energy utilization were proposed.In addition,the solutions adopted by the researchers to the above problems were discussed,and the rationality was analyzed accordingly.Finally,in view of the existing problems,the future development of MAO technology of magnesium alloys was discussed.MAO films are known for higher thickness,dense structure and ceramic phase,which usually shows excellent corrosion resistance and wear resistance compared to other types of films.However,due to the film-forming characteristics of MAO process,there is inevitably a certain porosity in the ceramic films.To increase film density,researchers have explored the use of nanoparticles in the electrolyte,which can be deposited onto the film by electrophoretic adsorption or electromigration under a strong electric field.In fact,ceramic films can be brittle and prone to fatigue and peel off during wear.To address this issue,increasing the toughness can enhance the energy absorption capacity of the films and prevent the rapid crack propagation.At present,there h

关 键 词：镁合金 微弧氧化 耐蚀性 耐磨性 生物学性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]