| 镁合金微弧氧化膜表面层与致密层界面组织的研究 |
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| 引用本文： | 李博文,陈显明.镁合金微弧氧化膜表面层与致密层界面组织的研究[J].兵器材料科学与工程,2011,34(3):57-60. |
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| 作者姓名： | 李博文 陈显明 |
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| 作者单位： | 肇庆学院,电子信息与机电工程学院,广东,肇庆,526061;肇庆学院,电子信息与机电工程学院,广东,肇庆,526061 |
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| 摘 要： | 研究镁合金微弧氧化膜的表面层与致密层界面处的组织形态。在磷酸盐碱性电解液(5～20g/LNaH2PO4,1～5g/LNaOH,5～8g/LKF,0.5～2g/LNa3C6H5O7,0.5～2g/LEDTA)中,以AZ91镁合金为基体制备出微弧氧化陶瓷薄膜,制备时采用恒电流控制模式,电流密度为10～30A/dm2。采用透射电镜(TEM)和扫描电镜(SEM)研究氧化薄膜界面及附近区域的微观结构。结果表明:微弧氧化膜的表面层靠近表面层与致密层界面处的组织以微晶和纳米晶为主,含有少量非晶态物质;微弧氧化膜的表面层与致密层界面处的组织以非晶态物质为主;微弧氧化膜的致密层靠近表面层与致密层界面处的组织为混晶组织,主要为MgO晶粒,少量为MgAlO4晶粒,并含有少量非晶态物质。
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| 关 键 词： | 镁合金 微弧氧化 界面 微晶 非晶 膜层 生长机制 |
Microstructure of boundary between surface layer and dense layer in micro-arc oxidation coating of magnesium alloys |
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| LI Bowen,CHEN Xianming.Microstructure of boundary between surface layer and dense layer in micro-arc oxidation coating of magnesium alloys[J].Ordnance Material Science and Engineering,2011,34(3):57-60. |
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| Authors: | LI Bowen CHEN Xianming |
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| Affiliation: | LI Bowen,CHEN Xianming (Department of Electronic and Information & Mechanical Engineering,Zhaoqing University,Zhaoqing 526061,China) |
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| Abstract: | Microstructure of boundary between surface layer and dense layer of the ceramic coating formed on AZ91 magnesium alloy substrate by micro-arc oxidation(MAO) was studided.The coating was prepared in a phosphate alkaline electrolytic solution composed of 5-20 g/L of NaH2PO4,1-5 g/L of NaOH,5-8 g/L of KF,0.5-2 g/L of Na3C6H5O7,and 0.5-2 g/Lof EDTA,a constant-current controlled AC power supply with a current density of 10-30 A/dm2 was employed;and the microstructure of the coatings was characterized using trans... |
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| Keywords: | magnesium alloy micro-arc oxidation boundary microcrystalline amorphous coating growth mechanism |
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