| 纳米SiO2复合对铝合金表面微弧氧化层生长动力学的影响 |
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| 引用本文： | 马世宁,索相波,邱骥,朱海燕.纳米SiO2复合对铝合金表面微弧氧化层生长动力学的影响[J].航空材料学报,2012,32(1):68-71. |
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| 作者姓名： | 马世宁 索相波 邱骥 朱海燕 |
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| 作者单位： | 1. 装甲兵工程学院装备再制造工程系,北京,100072
2. 酒泉卫星发射中心,甘肃酒泉,732750 |
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| 基金项目： | "十二五"装备预先研究项目 |
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| 摘 要： | 通过在微弧氧化电解液中添加纳米SiO2颗粒配制纳米电解液,在铝合金表面制备了纳米复合微弧氧化层,考察了恒电压和恒电流两种模式下纳米SiO2复合对微弧氧化层生长动力学的影响.结果表明,恒电压模式下,纳米SiO2复合大幅度提高了生长电流和微弧氧化层生长速率；恒电流模式下,纳米SiO2复合提高了微弧氧化层生长速率,电流效率提高.纳米SiO2颗粒在纳米复合微弧氧化层中掺杂,形成杂质能级,并且降低了微弧氧化层材料的禁带宽度,促进了微弧氧化电击穿过程,是纳米SiO2复合促进微弧氧化层生长的主要原因.
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| 关 键 词： | 铝合金 微弧氧化 纳米复合 生长动力学 掺杂 |
Effects of n-SiO2 on Growth Dynamics of Alumina Coatings Formed on 7A52 Aluminum Alloy by Micro-arc Oxidation |
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| MA Shi-ning
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SUO Xiang-bo
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QIU Ji
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ZHU Hai-yan.Effects of n-SiO2 on Growth Dynamics of Alumina Coatings Formed on 7A52 Aluminum Alloy by Micro-arc Oxidation[J].Journal of Aeronautical Materials,2012,32(1):68-71. |
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| Authors: | MA Shi-ning SUO Xiang-bo QIU Ji ZHU Hai-yan |
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| Institution: | 1(1.Department of Remanufacturing,Academy of Armored Forces Engineering,Beijing 100072,China;2.Jiuquan Satellite launching Center,Jiuquan 732750,Gansu China) |
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| Abstract: | Al2O3 coatings embedded with SiO2 nanoparticles were produced on 7A52 aluminum alloy by adding SiO2 nanoparticles into the electrolyte.The effect of n-SiO2 on the growth kinetics of the micro-arc oxidized coating under the two modes of constant voltage and constant current was investigated.The results show that nano-SiO2 increased the growth rate of micro-arc oxidized coating and the current efficiency.Nano-SiO2 is formed impurity energy level and narrowed band gap,so that impurity discharge is existed during the breakdown process and promoted the micro-arc oxidation process of electrical breakdown,resulting in the improvement of the growth efficiency of micro-arc oxidized coating. |
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| Keywords: | aluminum alloy micro-arc oxidation nanocompostie dynamics study doping |
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