Effects of spark discharge on the anodic coatings on magnesium alloy
文献类型：期刊论文
| 作者 | Wang, YH; Wang, J; Zhang, JB; Zhang, Z |
| 刊名 | MATERIALS LETTERS
 |
| 出版日期 | 2006-02-01 |
| 卷号 | 60期号:4页码:474-478 |
| ISSN号 | 0167-577X |
| 关键词 | Spark Discharge Micro-arc Oxidation Magnesium Alloy Oxygen Element Distribution Surface Potential |
| DOI | 10.1016/j.matlet.2005.09.015 |
| 文献子类 | Article |
| 英文摘要 | Spark discharge was the representative phenomenon of Micro-arc oxidation (MAO) method distinguished from other electrochemical oxidation methods. Under the spark discharge treatment, characteristics of the anodic layer were significantly changed. To investigate the influences of the spark discharge, a piece of magnesium alloy AZ91D specimen was partly treated by MAO method in alkaline silicate solution. And the microstructure, element distributions as well as the surface potential distributions of the specimen were studied by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and scanning Kelvin probe (SKP) technique. As a result of intensive spark discharge treatment, porous external layer with dense internal layer were formed on Mg alloy surface. At the same time, the depositions of OH- and SiO32- ions were accelerated, which resulted in the enrichment of element oxygen and silicon at the spark discharge region. Moreover, due to the compact internal layer, the intensive spark discharge region exhibited more positive potentials with respect to other regions, which meant this region could restrain the ejection of electron and provide effective protection to the substrate. In addition, it was found that oxygen played a vital role in determining the intensity and size of sparks, and abundant oxygen resulted in intensive and larger sparks. (c) 2005 Elsevier B.V. All rights reserved.; Spark discharge was the representative phenomenon of Micro-arc oxidation (MAO) method distinguished from other electrochemical oxidation methods. Under the spark discharge treatment, characteristics of the anodic layer were significantly changed. To investigate the influences of the spark discharge, a piece of magnesium alloy AZ91D specimen was partly treated by MAO method in alkaline silicate solution. And the microstructure, element distributions as well as the surface potential distributions of the specimen were studied by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and scanning Kelvin probe (SKP) technique. As a result of intensive spark discharge treatment, porous external layer with dense internal layer were formed on Mg alloy surface. At the same time, the depositions of OH- and SiO32- ions were accelerated, which resulted in the enrichment of element oxygen and silicon at the spark discharge region. Moreover, due to the compact internal layer, the intensive spark discharge region exhibited more positive potentials with respect to other regions, which meant this region could restrain the ejection of electron and provide effective protection to the substrate. In addition, it was found that oxygen played a vital role in determining the intensity and size of sparks, and abundant oxygen resulted in intensive and larger sparks. (c) 2005 Elsevier B.V. All rights reserved. |
| 学科主题 | Materials Science, Multidisciplinary ; Physics, Applied |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000233881800011 |
| 公开日期 | 2010-12-24 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/5469]  |
| 专题 | 海洋研究所_海洋生态与环境科学重点实验室 |
| 作者单位 | 1.Ocean Univ China, Dept Chem & Chem Engn, Qingdao 266003, Peoples R China 2.State Key Lab Corros & Protect Met, Shenyang 110016, Peoples R China 3.Zhanjiang Ocean Univ, Zhanjiang 524088, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, YH,Wang, J,Zhang, JB,et al. Effects of spark discharge on the anodic coatings on magnesium alloy[J]. MATERIALS LETTERS,2006,60(4):474-478. |
| APA | Wang, YH,Wang, J,Zhang, JB,&Zhang, Z.(2006).Effects of spark discharge on the anodic coatings on magnesium alloy.MATERIALS LETTERS,60(4),474-478. |
| MLA | Wang, YH,et al."Effects of spark discharge on the anodic coatings on magnesium alloy".MATERIALS LETTERS 60.4(2006):474-478. |
入库方式： OAI收割
来源：海洋研究所
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