| Preparation of micro-arc oxidation coatings on magnesium alloy and its thermal shock resistance property |
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| 作者姓名： | JIANG Zhaohua ZENG Xiaobin and YAO Zhongping |
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| 作者单位： | JIANG Zhaohua，ZENG Xiaobin，and YAO Zhongping Department of Applied Chemistry，Harbin Institute of Technology，Harbin 150001，China |
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| 基金项目： | 国家自然科学基金;国家重点实验室基金 |
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| 摘 要： | 1. Introduction Due to their high specific strength, good electro-magnetic shielding characteristics, high damping characteristics, good cast ability, and excellent pol-ishing capability, magnesium alloys are extensively used in aeronautical, automobile, and electro- communication industries 1-3]. But magnesium has some disadvantages, such as low chemical stability, high negative electric potential, and low hardness, so it is necessary to use surface disposal to accommo-date the demand for re…
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| 关 键 词： | 微弧氧化 陶瓷涂层 抗热震性 镁合金 |
| 收稿时间： | 2005-04-28 |
Preparation of micro-arc oxidation coatings on magnesium alloy and its thermal shock resistance property |
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| JIANG Zhaohua,ZENG Xiaobin,and YAO Zhongping.Preparation of micro-arc oxidation coatings on magnesium alloy and its thermal shock resistance property[J].Rare Metals,2006,25(3):270-273. |
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| Authors: | JIANG Zhaohua ZENG Xiaobin YAO Zhongping |
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| Affiliation: | 1. Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, ON N6A 5B9, Canada;2. National Research Council Canada, 800 Collip Circle, London, ON N6G4X8, Canada;3. Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada;4. National Research Council Canada, 800 Collip Circle, London ON, N6G4X8, Canada;5. Surface Science Western, Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada;6. Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, ON N6A 5B9, Canada;1. School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China;2. Key Laboratory on Deep Geo-drilling Technology of the Ministry of Land and Resources, China University of Geosciences (Beijing), Beijing 100083, PR China;3. Beijing Huayou Guanchang Environment and Energy Science & Technology Development Co., Ltd., Beijing 100020, China;1. Ufa State Aviation Technical University, 12 Karl Marx Street, Ufa 450000, Russia;2. University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield S1 3JD, UK |
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| Abstract: | In the NaAlO2-Na2SiO3 compound system, the ceramic coatings were prepared on magnesium alloy by microarc oxidation. The morphology, phase composition, and thermal shock resistance of the ceramic coatings were studied by scanning electron microscope, X-ray diffraction and thermal shock tests, respectively. The results showed that the ceramic coating contains MgO, MgAl2O4, as well as a little amount of Mg2SiO4. The thickness of the ceramic coatings increases with the current density increasing, when the current density is 12 A·dm−2, the thermal shock resistance of the produced ceramic coating is the best. The hardness of the ceramic coating is up to 10 GPa or so. |
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| Keywords: | micro-arc oxidation ceramic coatings thermal shock resistance magnesium alloy |
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