无机材料学报2017，Vol.32Issue(12)：1292-1298,7.DOI:10.15541/jim20170057
电流密度对MgO-ZnO陶瓷薄膜结构和热控性能的影响
Current Density on Microstructure and Thermal Control Performances of MgO-ZnO Ceramic Coatings
摘要
Abstract
MgO-ZnO thermal control coatings were prepared on AZ31 magnesium alloy using micro-arc oxidation (MAO) in the electrolyte containing Zn(H2PO4)2. The influence of current density on the microstructure, composition, adhesive strength, and thermal control performances of MAO coatings were investigated, and the variation of solar absorptance (αs) was examined at different ultraviolet irradiation time. The results show that the MAO coating is composed of MgO, ZnO and a few amorphous phases. With an increase of current density, the number of pores gradu-ally decreases while the roughness increases. As the thickness, adhesion and emittance (ε) firstly increase and then de-crease, the changing tendency ofαs shows the opposite. When the current density is set at 9 A/dm2, the MAO coating exhibits a stronger adhesive strength of 12.6 MPa, a higherε of 0.872 and a lowerαs of 0.363. Moreover, the ultravio-let irradiation test reveals that theαs increases followed by leveling off with increasing irradiation time. This process provides a technical support for fabricating thermal control coating with excellent adhesion, lowαs/ε ratio, and good anti-ultraviolet irradiation.关键词
微弧氧化/热控薄膜/ZnO/紫外辐照Key words
micro-arc oxidation/thermal control coating/ZnO/ultraviolet irradiation分类
化学化工引用本文复制引用
李航,卢松涛,秦伟,吴晓宏..电流密度对MgO-ZnO陶瓷薄膜结构和热控性能的影响[J].无机材料学报,2017,32(12):1292-1298,7.基金项目
国家自然科学基金(51671074) National Natural Science Foundation of China (51671074) （51671074）
