| HUANG Dan,ZHANG Xiao-yan,WU De-feng.Effects of Nano α-Al2O3 Additive on the Performance of Micro-arc Oxidation Coating Formed on Aluminum Alloy[J],43(4):43-47 |
| Effects of Nano α-Al2O3 Additive on the Performance of Micro-arc Oxidation Coating Formed on Aluminum Alloy |
| Received:April 16, 2014 Revised:May 12, 2014 |
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| DOI： |
| KeyWord:aluminum alloy micro-arc oxidation nano-α-Al2O3additive |
| Author | Institution |
| HUANG Dan |
College of Materials and Metallurgy, Guizhou University, Guiyang , China |
| ZHANG Xiao-yan |
College of Materials and Metallurgy, Guizhou University, Guiyang , China |
| WU De-feng |
College of Materials and Metallurgy, Guizhou University, Guiyang , China |
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| Abstract: |
| Objective To explore the effects of α-Al2O3 content on the microstructure and mechanical properties of the coating formed on aluminum alloy by the method of micro-arc oxidation with α-Al2O3 addition in electrolyte system. Methods Different ceramic coatings were obtained by adding 1 ~ 5 g / L nanoα-Al2O3 additive into the silicate system solution and the micro-structure, thickness, hardness and corrosion resistance were analyzed. Results The main phases of the coating were α-Al2O3 , γ-Al2O3 and SiO2 . There were few micro-cracks and small porosity of the coating when the content of nano α-Al2O3 was 3 g / L, and the thickness reached 70 μm, the hardness was 513 HV and the corrosion resistance of the coating was good. Conclusion Addition of α-Al2O3 into the silicate electrolyte system could improve the comprehensive performances of the micro-arc oxidation coating on alu |
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