Preparation and performance of coating on rare-earth compounds-immersed magnesium alloy by micro-arc oxidation
稀土盐浸泡镁合金微弧氧化膜层的制备及性能(英文)作者机构：华中科技大学材料成形与模具技术国家重点实验室武汉430074 南昌航空大学轻合金加工科学与技术国防重点学科实验室南昌330063
出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)
年 卷 期：2012年第22卷第7期
页 面：1647-1654页
核心收录：
学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：Project (gf200901002) support by the National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology of Nanchang Hangkong University China
主 题：AZ91D magnesium alloy micro-arc oxidation(MAO) Y2O3-ZrO2-MgO composite coating corrosion behavior thermal stability
摘 要：A composite ceramic coating containing Y2O3-ZrO2-MgO（YSZ-MgO） was prepared on AZ91D magnesium alloy,which was immersed in Y（NO3）3 aqueous solution as pretreatment,by micro-arc oxidation（MAO） *** morphology,elemental and phase compositions,corrosion behavior and thermal stability of the coatings were studied by SEM,EDX,XRD,electrochemical corrosion test,high temperature oxidation and thermal shock *** results show that the coating mainly consists of ZrO2,Y2O3,MgO,Mg2SiO4,and *** these compounds,Y2O3 accounts for 26.7% of（Y2O3 ＋ ZrO2）.The thickness of YSZ-MgO coating is smaller than that of ZrO2-MgO coating,but its compactness and surface roughness are better than those of ZrO2-MgO ***-MgO coating has a good corrosion resistance,and its corrosion rate in 5% NaCl aqueous solution is lower than that of ZrO2-MgO and only about 8.5% of that of AZ91D magnesium *** oxidation at 410 °C,the mass gain of AZ91D magnesium alloy presents a linear increase with the oxidation *** YSZ-MgO coating and ZrO2-MgO coating can remarkably decrease the oxidation mass *** oxidation mass gain of YSZ-MgO coating is lower than that of ZrO2-MgO coating,especially during a long oxidation *** thermal shock resistance of YSZ-MgO coating is superior to ZrO2-MgO coating.
维普期刊数据库
同方期刊数据库