| GAO Guang-rui,XI Zheng-ping,LI Zheng-xian,DU Ji-hong,Li Hong-zhan,WANG-pei.Effects of Current Density on Micro-arc Oxidation Coatings of ZL205A Alloy[J],39(5):88-91 |
| Effects of Current Density on Micro-arc Oxidation Coatings of ZL205A Alloy |
| Received:April 23, 2010 Revised:October 10, 2010 |
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| DOI： |
| KeyWord:ZL205A aluminium alloy micro-arc oxidation current density wear resistance |
| Author | Institution |
| GAO Guang-rui |
Northwest Institute for Nonferrous Metal Research, Xi'an , China |
| XI Zheng-ping |
Northwest Institute for Nonferrous Metal Research, Xi'an , China |
| LI Zheng-xian |
Northwest Institute for Nonferrous Metal Research, Xi'an , China |
| DU Ji-hong |
Northwest Institute for Nonferrous Metal Research, Xi'an , China |
| Li Hong-zhan |
Northwest Institute for Nonferrous Metal Research, Xi'an , China |
| WANG-pei |
Northwest Institute for Nonferrous Metal Research, Xi'an , China |
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| Abstract: |
| Ceramic coating were prepared on ZL205A aluminium alloy by micro-are oxidation(MAO)at different current density and fixed other conditions. The effects of anode current density on the thickness, morphology, phase composition and the wear resistance of oxidation coating were studied.The results show that the total thickness and dense layer of MAO coating increase linearly with the increasing of current density. The size of micro-pore of oxidation coating increases, while the micropores number decreases. The content of Al-Si-O, main phase composition in MAO coating is increased with the increasing of current density, because more SiO32- are involved in the MAO reaction. The wear test shows that the wear mechanism of MAO coating is abrasive wear. The friction coeffition of MAO is higher than the substrate. The effect of the current density on friction coeffition isn't apparently. The wear resistance decreases with the increasing of current density. |
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