| 引用本文: | 索相波,邱骥,刘吉延.电解液中添加纳米SiO2对7A52铝合金表面微弧氧化陶瓷层生长过程及性能的影响[J].中国表面工程,2010,(3):42~45 |
| SUO Xiang-bo,QIU Ji,LIU Ji-yan.Effects of SiO2 Nanoparticles in Electrolytes on Growth Process and Surface Properties of Alumina Coatings Formed on 7A52 Aluminium Alloy by Micro-arc Oxidation[J].China Surface Engineering,2010,(3):42~45 |
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| 摘要: |
| 为了改善微弧氧化陶瓷层表面疏松状况,通过在电解液中添加纳米SiO2颗粒,在7A52铝合金表面制备了含纳米SiO2颗粒的复合陶瓷层.添加纳米SiO2颗粒后,试样表面电流密度也大幅度提高,陶瓷层生长速度提高了近一倍.采用XRF,SEM,维氏硬度计和往复式摩擦磨损试验机对陶瓷层进行了考察.结果表明,纳米SiO2进入了陶瓷层,纳米SiO2颗粒复合处理后,陶瓷层更加致密,显微硬度和耐磨性大幅度提高. |
| 关键词: 微弧氧化 陶瓷层 纳米SiO2颗粒 表面性能 |
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| 基金项目:装备再制造技术国防科技重点实验室基金（9140C8504030810） |
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| Effects of SiO2 Nanoparticles in Electrolytes on Growth Process and Surface Properties of Alumina Coatings Formed on 7A52 Aluminium Alloy by Micro-arc Oxidation |
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SUO Xiang-bo,QIU Ji,LIU Ji-yan
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National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072
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| Abstract: |
| In order to enhance the properties of the layers produced by micro–arc oxidation, Al2O3 coatings embedded with SiO2 nanoparticles were produced on 7A52 aluminium alloy by adding SiO2 nanoparticles into the electrolyte. With the addition of SiO2 nanoparticles in the electrolyte, the formation rate of Al2O3 coating enhanced considerably and the current density through sample surface became much higher than that without SiO2 at the same voltage. The Coatings were investigated with X–ray fluorescence spectrometry (XRF), Scanning electron microscopy (SEM), Vickers hardness test, reciprocating friction and wear test. The XRF results showed that SiO2 nanoparticles were successfully embedded in the Al2O3 coatings. Compared with the Al2O3 coatings without SiO2 nanoparticles, the MAO Al2O3 coatings with SiO2 nanoparticles are much denser and harder, and the wear resistance is also improved significantly. |
| Key words: micro–arc oxidation ceramic coatings SiO2 nanoparticles surface properties |
