AZ91D镁合金微弧氧化陶瓷膜的制备及其性能研究的中期报告摘要：本研究以AZ91D镁合金为基础材料，采用微弧氧化技术制备陶瓷膜，并对其进行了性能研究。通过不同工艺参数的调节，制备得到表面粗糙度适中、结晶细小、结合力高等性能良好的陶瓷膜，其拉伸强度和硬度分别达到了232MPa和641Hv。通过扫描电镜和能谱分析发现，陶瓷膜表面形成了均匀致密的氧化物层，并含有少量的镁、铝等元素。进一步的电化学测试表明，陶瓷膜具有优异的耐腐蚀性能，在0.5mol/LNaCl溶液中，其腐蚀电流密度仅为基材的1/4。关键词：AZ91D镁合金；微弧氧化；陶瓷膜；性能Abstract：Inthisstudy,micro-arcoxidationtechnologywasusedtoprepareceramicfilmsonAZ91Dmagnesiumalloy,andthepropertiesoftheceramicfilmswerestudied.Byadjustingdifferentprocessparameters,ceramicfilmswithgoodpropertiessuchasmoderatesurfaceroughness,finecrystals,andhighbondingstrengthwereprepared,andtheirtensilestrengthandhardnessreached232MPaand641Hv,respectively.Scanningelectronmicroscopyandenergyspectrumanalysisshowedthatauniformanddenseoxidelayerwasformedonthesurfaceoftheceramicfilm,anditcontainedasmallamountofmagnesium,aluminumandotherelements.Furtherelectrochemicaltestsshowedthattheceramicfilmhadexcellentcorrosionresistance,anditscorrosioncurrentdensityin0.5mol/LNaClsolutionwasonly1/4ofthesubstrate.Keywords:AZ91Dmagnesiumalloy;micro-arcoxidation;ceramicfilm;properties