| Al2O3微粉添加量对镁合金微弧氧化膜特性影响研究 |
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| 引用本文： | 王平,伍婷,肖佑涛,蒲俊,徐明,向春浪,郭小阳.Al2O3微粉添加量对镁合金微弧氧化膜特性影响研究[J].稀有金属材料与工程,2017,46(5):1260-1264. |
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| 作者姓名： | 王平 伍婷 肖佑涛 蒲俊 徐明 向春浪 郭小阳 |
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| 作者单位： | 西南石油大学材料科学与工程学院,西南石油大学材料科学与工程学院,西南石油大学材料科学与工程学院,西南石油大学材料科学与工程学院,西南石油大学材料科学与工程学院,西南石油大学材料科学与工程学院,西南石油大学材料科学与工程学院 |
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| 基金项目： | 西南石油大学科研启航计划项目(2015QHZ020)资助,四川省高等学校油气田材料重点实验室资助项目(X151515KCL16) |
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| 摘 要： | 为了研究添加Al2O3微粉对AZ31A镁合金微弧氧化膜特性影响,在不同浓度Al2O3微粉电解液中对其进行了微弧氧化处理。利用扫描电镜(SEM)观察微弧氧化膜形貌,能谱仪(EDS)分析了膜层表面Ca、Mg、O、Al元素分布,X射线衍射仪(XRD)分析了相组成,测定了膜厚、硬度和氧化液中Al2O3表面电荷,讨论了掺杂改性机理。结果表明,加入Al2O3微粉后,氧化电压随Al2O3添加量增加先增加后降低；氧化膜表面孔洞数量和尺寸减小,膜层表面Ca元素分布逐渐减少,成膜效率降低,膜层致密度和表面疏松层硬度提高,氧化膜主要由MgO和MgO4等相组成。
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| 关 键 词： | AZ31A 微弧氧化 Al2O3微粉 改性机理 |
| 收稿时间： | 2016/1/5 0:00:00 |
| 修稿时间： | 2016/6/29 0:00:00 |
Effects of Al2O3Micro Powder Additive Amount on Characteristics of Micro-arc Oxidation Coating Formed on Magnesium Alloy |
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| WANG Ping,WU Ting,Xiao You-tao,Pu Jun,XU Ming,XIANG Chun Lang and GUO Xiao-yang.Effects of Al2O3Micro Powder Additive Amount on Characteristics of Micro-arc Oxidation Coating Formed on Magnesium Alloy[J].Rare Metal Materials and Engineering,2017,46(5):1260-1264. |
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| Authors: | WANG Ping WU Ting Xiao You-tao Pu Jun XU Ming XIANG Chun Lang and GUO Xiao-yang |
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| Affiliation: | College of Material Science and Engineering,Southwest Petroleum University,State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu,Sichuan,College of Material Science and Engineering,Southwest Petroleum University,State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu,Sichuan,College of Material Science and Engineering,Southwest Petroleum University,State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu,Sichuan,College of Material Science and Engineering,Southwest Petroleum University,State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu,Sichuan,College of Material Science and Engineering,Southwest Petroleum University,State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu,Sichuan,College of Material Science and Engineering,Southwest Petroleum University,State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu,Sichuan,College of Material Science and Engineering,Southwest Petroleum University,State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu,Sichuan |
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| Abstract: | In order to research the effects of Al2O3 micro powder additive amount on characteristics of micro-arc oxidation coating formed on AZ31A magnesium alloy, it was treated by using micro-arc oxidation in different concentration of Al2O3 micro powder electrolyte. Surface morphologies, Ca, Mg, O and Al elements distribution, phase composition of micro-arc oxidation coating were analyzed by SEM, EDS and XRD. Thickness and hardness of micro-arc oxidation coating and surface charge of Al2O3 micro powder in electrolyte were measured. The doping modification mechanism was discussed in this paper. The results show that the oxidation voltage was raised firstly and then declined gradually while Al2O3 micro powder amount increasing. The numbers and sizes of hole and distribution of Ca element on oxidation coating surface and formation efficiency decreased, compactness of coating, and the hardness of surface porosity coating increased. Oxidation coating was mainly composed by MgO and MgO4 phase. |
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| Keywords: | AZ31A micro-arc oxidation Al2O3 micro powder modified mechanism |
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