Effect of Current Density on Structure and Hardness of the MAO Film on 7N01 Aluminum Alloy Surface for Water Pump
In order to improve performance of the MAO film on 7N01 aluminum alloy for water pump, the oxide film was prepared in an electrolyte containing graphene by controlling different micro-arc oxidation current density, and its structure and properties were analyzed as well. Results showed that thicker o...
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Editorial Department of Materials Protection
2021-07-01
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| Series: | Cailiao Baohu |
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| Online Access: | http://www.mat-pro.com/fileup/1001-1560/PDF/20210719.pdf |
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| author | WEI Si-yuan, LIU Zhi-ying |
| author_facet | WEI Si-yuan, LIU Zhi-ying |
| author_sort | WEI Si-yuan, LIU Zhi-ying |
| collection | DOAJ |
| description | In order to improve performance of the MAO film on 7N01 aluminum alloy for water pump, the oxide film was prepared in an electrolyte containing graphene by controlling different micro-arc oxidation current density, and its structure and properties were analyzed as well. Results showed that thicker oxide film could be prepared under higher current density, and the film thickness and current density had an obvious linear variation trend. During the discharge phase, part of the graphene sheet layer was also deposited into the MAO film, and then condensed with Al2O3 melt, resulting in the increase of the thickness of the film layer. When the current density increased to 3 A/dm2, the micropores with bridging structure were formed on the surface of oxide film, and the greater thermal stress was generated in the stage of rapid cooling. The graphene sheet gradually diffused into the ceramic film during the micro-arc oxidation stage, and the diffusion rate was significantly correlated with the current density. The ceramic film prepared at different current densities all contained Al, α-Al2O3 and γ-Al2O3, and Al2Cu phase structure was also found. The hardness of the MAO film prepared with the current density of 1 A/dm2 was 158.3 HV. When the current density increased, the hardness of the film was also improved. After increasing the current density, the oxide film formed a more compact structure, and the bonding between MAO film and substrate was stronger. |
| format | Article |
| id | doaj-art-ba66828c78df487cbc2c09842fd67431 |
| institution | Kabale University |
| issn | 1001-1560 |
| language | zho |
| publishDate | 2021-07-01 |
| publisher | Editorial Department of Materials Protection |
| record_format | Article |
| series | Cailiao Baohu |
| spelling | doaj-art-ba66828c78df487cbc2c09842fd674312025-08-20T03:50:01ZzhoEditorial Department of Materials ProtectionCailiao Baohu1001-15602021-07-0154710710.16577/j.cnki.42-1215/tb.2021.07.019Effect of Current Density on Structure and Hardness of the MAO Film on 7N01 Aluminum Alloy Surface for Water PumpWEI Si-yuan, LIU Zhi-ying01. Department of Equipment Engineering, Henan Vocational and Technical College of Architecture, Zhengzhou 450000, China;2. School of Environmental Engineering, Nanjing University of Technology, Nanjing 211816, ChinaIn order to improve performance of the MAO film on 7N01 aluminum alloy for water pump, the oxide film was prepared in an electrolyte containing graphene by controlling different micro-arc oxidation current density, and its structure and properties were analyzed as well. Results showed that thicker oxide film could be prepared under higher current density, and the film thickness and current density had an obvious linear variation trend. During the discharge phase, part of the graphene sheet layer was also deposited into the MAO film, and then condensed with Al2O3 melt, resulting in the increase of the thickness of the film layer. When the current density increased to 3 A/dm2, the micropores with bridging structure were formed on the surface of oxide film, and the greater thermal stress was generated in the stage of rapid cooling. The graphene sheet gradually diffused into the ceramic film during the micro-arc oxidation stage, and the diffusion rate was significantly correlated with the current density. The ceramic film prepared at different current densities all contained Al, α-Al2O3 and γ-Al2O3, and Al2Cu phase structure was also found. The hardness of the MAO film prepared with the current density of 1 A/dm2 was 158.3 HV. When the current density increased, the hardness of the film was also improved. After increasing the current density, the oxide film formed a more compact structure, and the bonding between MAO film and substrate was stronger.http://www.mat-pro.com/fileup/1001-1560/PDF/20210719.pdf7n01 aluminum alloy; micro-arc oxidation; current density; graphene; structure; hardness |
| spellingShingle | WEI Si-yuan, LIU Zhi-ying Effect of Current Density on Structure and Hardness of the MAO Film on 7N01 Aluminum Alloy Surface for Water Pump Cailiao Baohu 7n01 aluminum alloy; micro-arc oxidation; current density; graphene; structure; hardness |
| title | Effect of Current Density on Structure and Hardness of the MAO Film on 7N01 Aluminum Alloy Surface for Water Pump |
| title_full | Effect of Current Density on Structure and Hardness of the MAO Film on 7N01 Aluminum Alloy Surface for Water Pump |
| title_fullStr | Effect of Current Density on Structure and Hardness of the MAO Film on 7N01 Aluminum Alloy Surface for Water Pump |
| title_full_unstemmed | Effect of Current Density on Structure and Hardness of the MAO Film on 7N01 Aluminum Alloy Surface for Water Pump |
| title_short | Effect of Current Density on Structure and Hardness of the MAO Film on 7N01 Aluminum Alloy Surface for Water Pump |
| title_sort | effect of current density on structure and hardness of the mao film on 7n01 aluminum alloy surface for water pump |
| topic | 7n01 aluminum alloy; micro-arc oxidation; current density; graphene; structure; hardness |
| url | http://www.mat-pro.com/fileup/1001-1560/PDF/20210719.pdf |
| work_keys_str_mv | AT weisiyuanliuzhiying effectofcurrentdensityonstructureandhardnessofthemaofilmon7n01aluminumalloysurfaceforwaterpump |