以钒盐为添加剂,采用微弧氧化法在AZ40 M镁合金表面原位生长1层陶瓷膜层.采用SEM、XRD、AE辐射计及 UV-3100分光光度计分别测试陶瓷膜层的微观结构和热控性能.结果表明,膜层主要成分为MgO、VO2和V2 O3；随着电解液中钒盐含量的增加,膜层的太阳吸收比逐渐升高,随后保持稳定,最高可以达到0．93,半球发射率先升高后降低,当钒盐浓度达到8 g/L时,膜层的半球发射率达到最大值0．87.通过研究发现,含有钒氧化物的镁合金微弧氧化膜层可以作为一种优良的热控膜层在航天器上应用.
This research investigates the effect of VO3 + ions on the thermal and optical properties of the ceramic coatings formed on AZ40M Mg alloy.The different ceramic coatings were obtained by micro-arc oxidation (MAO)in electrolytes that contain varied concentrations of VO3 +.The microstructure,element distribution, composition as well as the thermal and optical properties of the coatings were studied with scanning electron mi-croscopy (SEM),X-ray diffraction (XRD),AE radiometer,UV-3100 spectrophotometer.The results show that all of the coatings prepared were mainly composed with MgO and trace-amount of vanadium oxide presents. With the increasing of the concentration of VO3 +,the solar absorptance increased initially but then remain sta-ble and the hemispheric emittance increased initially but then decreased.We found that at the concentrations 8 g/L,the coating has the highest hemispheric emittance (0.86).Our results show that coatings formed with this method could be useful as a thermal control coating in a variety of applications,such as in the spacecraft.
参考文献
| [1] | Long W L;Cooke E W .Anodic coatings for temperature control in space vehicles[R].America:North American A-viation Inc Downey Ca Space DIV,1960. |
| [2] | Kumar CS.;Mahendra KN.;Mayanna SM.;Sharma AK. .Studies on anodic oxide coating with low absorptance and high emittance on aluminum alloy 2024[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,2000(1):51-57. |
| [3] | Maria Brogren;Geoffrey L. Harding;Richard Karmhag;Carl G. Ribbing;Gunnar A. Niklasson;Lars Stenmark .Titanium-aluminum-nitride coatings for satellite temperature control[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2000(1/2):268-277. |
| [4] | Huong Giang Le;Chesterfield J L .High-absorptance high-emittance anodic coating[P].USP:5948542,1999-11-07. |
| [5] | Kim K De Groh;Smith Daniela C;Wheeler Donald R et al.Effects of ambient high temperature exposure on alu-mina-titania high emittance surfaces for solar dynamic systems[R].Cleveland:INASA Lewis Research Centel,1998. |
| [6] | Shen Dejiu;Zou Jie;Wu Lailei;Liu Fangfei;Li Guolong;Cai Jingrui;He Donglei;Ma Haojie;Jiang Guirong .Effect of high temperature oxidation prefab film on formation of micro-arc oxidation coatings on 6061 aluminum alloy[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2013(Jan.15):431-437. |
| [7] | Ebru Emine Demirci;Ersin Arslan;Kadri Vefa Ezirmik;OEzlem Baran;Yasar Totik;Ihsan Efeoglu .Investigation of wear, corrosion and tribocorrosion properties of AZ91 Mg alloy coated by micro arc oxidation process in the different electrolyte solutions[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2013(Jan.15):116-122. |
| [8] | CHEN Jing,WANG Zexin,LU Sheng.Effects of electric parameters on microstructure and properties of MAO coating fabricated on ZK60 Mg alloy in dual electrolyte[J].稀有金属（英文版）,2012(02):172-177. |
| [9] | Zhang XP;Zhao ZP;Wu FM;Wang YL;Wu J .Corrosion and wear resistance of AZ91D magnesium alloy with and without microarc oxidation coating in Hank's solution[J].Journal of Materials Science,2007(20):8523-8528. |
| [10] | Jiang Bailing;Zhang Shufen;Wu Guojian et al.Microf-law and phases constitution of ceramic coating formed by micro-arc oxidation on magnesium alloys and their influ-ence on corrosion-resistance[J].The Chinese Journal of Nonferrous Metals,2012,12(03):20-26. |
| [11] | 崔作兴,邵忠财,刘志远,赵立新,田彦文.添加剂对镁合金微弧氧化膜性能的影响[J].材料研究学报,2009(02):193-198. |
| [12] | 石西昌,肖湘,尚伟,陈白珍,徐徽,杨喜云.镁合金微弧氧化添加剂的优选[J].材料保护,2009(02):55-57,68. |
| [13] | 龙迎春,李文芳,张果戈,于非.添加剂C6H12N4对6063铝合金微弧氧化黑色陶瓷膜结构与性能的影响[J].中国腐蚀与防护学报,2012(05):388-392. |
| [14] | Laleh M;Kargar F;Rouhaghdam A S .Formation of a compact oxide layer on AZ91D magnesium alloy by mi-croarc oxidation via addition of cerium chloride into the MAO electrolyte[J].Journal of Coatings Technology and Research,2011,8(06):765-771. |
| [15] | WU Xiang-qing,XIE Fa-qin,HU Zong-chun,WANG Li.Effects of additives on corrosion and wear resistance of micro-arc oxidation coatings on TiAl alloy[J].中国有色金属学报（英文版）,2010(06):1032-1036. |
| [16] | Li Yuhai;Zhao Yan;Li Baoyi et al.Wear resistance of microarc oxidation coatings on 2A12 alloy in different electrolyte[J].Journal of Functional Materials,2012,42:354-357. |
| [17] | Yang Mei;Liu Qingcai;Xue Qi et al.Preparation of micro-arc oxiedation coating on TC1 1 titanium alloy and study on its microstructure and performance[J].Journal of Functional Materials,2011,42(01):34-36. |
| [18] | Pan Zhenfeng .Study on preparation of AZ91D MAO coating in silicate[D].Lanzhou:Lanzhou University of Technology,2010. |
| [19] | 李文芳,黄京浩,张永君,杜军.镁合金微弧氧化过程中参数对成膜效果的影响和优化[J].材料工程,2006(02):51-55. |
| [20] | Anandan C;Rajam K S .Position,structure and mor-phology of oxide layers formed on austenitic stainless steel by oxygen plasma immersion ion implantation[J].Applied Surface Science,2007,253(16):6854-6859. |
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