通过向电解液中添加纳米二氧化硅颗粒(n-SiO_2),经微弧氧化,在7A52铝合金表面制备n-SiO_2复合陶瓷层,研究n-SiO_2复合处理对陶瓷层孔隙率及性能的影响.结果表明,经n-SiO_2复合处理后,陶瓷层孔隙尺寸减小,孔隙率降低,致密性提高,因而陶瓷层显微硬度和抗盐雾腐蚀性能显著提高.n-SiO_2在放电通道处沉积是陶瓷层致密性提高的主要原因.
Ceramic coatings incorporated with SiO_2 nanoparticles were fabricated on 7A52 aluminum alloy during micro-arc oxidation by mixing SiO_2 nanoparticles into the electrolyte. The porosity and properties of the ceramic coatings were investigated. The results show that coatings embedded with SiO_2 nanoparticles exhibit lower porosity and improved compactness, which lead to higher microhardness and better corrosion resistance. The enhancement of compactness can be attributed to SiO_2 nanoparticles deposited in discharge pores during the micro-arc oxidation process.
参考文献
| [1] | 蒋百灵,张先锋,朱静.铝、镁合金微弧氧化技术研究现状和产业化前景[J].金属热处理,2004(01):23-29. |
| [2] | 熊仁章,盛磊,郭洪光.铝合金微弧氧化陶瓷层的性能研究[J].材料保护,2000(07):13. |
| [3] | NIE X;LEYLAND A;YEROKHIN A L et al.Thickness effects on the mechanical properties of micro-arc discharge oxide coatings on aluminum alloys[J].Surface and Coatings Technology,1999,116-119:1055-1060. |
| [4] | A. L. Yerokhin;X. Nie;A. Leyland;A. Matthews;S. J. Dowey .Plasma electrolysis for surface engineering[J].Surface & Coatings Technology,1999(2/3):73-93. |
| [5] | 滕敏,赫晓东,李垚.铝合金等离子体微弧氧化陶瓷层组织与性能研究[J].航空材料学报,2004(06):47-49. |
| [6] | Yang Guangliang;Lu Xianyi;Bai Yizhen .The effects of current density on the phase composition and microstructure properties of micro-arc oxidation coating[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2002(1/2):196-200. |
| [7] | 辛铁柱,赵万生,刘晋春.铝合金表面微弧氧化陶瓷膜的摩擦学性能及微观结构研究[J].航天制造技术,2005(04):5-8. |
| [8] | 王乃丹,龙北玉,吴汉华,毕冬梅,汪剑波,李全军.单极性脉冲电流密度对铝合金MAO膜相结构和微结构的影响[J].吉林大学学报（理学版）,2005(05):645-649. |
| [9] | 赵豪民,江俊灵,戴新江.铝材微弧氧化功率与表面粗糙度的关系[J].材料保护,2005(05):66-67. |
| [10] | 李建中,邵忠财,田彦文,翟玉春,郝清伟.不同含磷电解液在微弧氧化过程中的作用[J].中国腐蚀与防护学报,2004(04):222-225. |
| [11] | 郝建民,李波,王利捷,陈宏.弱酸性介质中铝合金微弧氧化研究[J].轻合金加工技术,2005(06):32-34. |
| [12] | 薛文斌,华铭,杜建成,田华,施修龄.LC4超硬铝微弧氧化膜的生长及表征[J].航空材料学报,2008(02):34-38. |
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