李涛,张鹏,卢松涛,吴晓宏.铝合金表面ZnO/Y2O3/Al2O3微弧氧化涂层的制备及其热控性能研究[J].表面技术,2020,49(12):8-13, 37. LI Tao,ZHANG Peng,LU Song-tao,WU Xiao-hong.Preparation and Thermal Control Performance of ZnO/Y2O3/Al2O3 Micro-arc Oxidation Coating on Aluminum Alloy Surface[J].Surface Technology,2020,49(12):8-13, 37 |
铝合金表面ZnO/Y2O3/Al2O3微弧氧化涂层的制备及其热控性能研究 |
Preparation and Thermal Control Performance of ZnO/Y2O3/Al2O3 Micro-arc Oxidation Coating on Aluminum Alloy Surface |
投稿时间:2020-11-19 修订日期:2020-12-10 |
DOI:10.16490/j.cnki.issn.1001-3660.2020.12.002 |
中文关键词: 铝合金 微弧氧化 稀土元素钇 ZnO 热控涂层 |
英文关键词:aluminum alloy micro-arc oxidation rare earth element yttrium ZnO thermal control coatings |
基金项目:国家自然科学基金(51671074) |
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Author | Institution |
LI Tao | School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China |
ZHANG Peng | School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China |
LU Song-tao | School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China |
WU Xiao-hong | School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China |
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中文摘要: |
目的 改善铝合金表面热控性能。方法 通过微弧氧化技术,采用六水合硝酸钇(Y(NO3)3.6H2O)为稀土改性剂,在铝合金表面原位构筑ZnO/Y2O3/Al2O3微弧氧化涂层。利用X射线衍射仪、X射线光电子能谱仪和扫描电子显微镜,分析涂层晶体结构、化学组成和表面形貌;利用红外发射率仪和紫外/可见/近红外分光光度计分别测量涂层的发射率与太阳吸收率,进而探究涂层热控性能及其影响因素。结果 实验表明,钇源的用量能够显著影响涂层结构和热控性能,当钇源质量浓度为6 g/L时,所得ZnO/Y2O3/Al2O3涂层的红外发射率为0.859,太阳吸收率为0.405,具有最低吸辐比0.471,显示出优异的热控性能。结论 原位构筑稀土元素Y改性的微弧氧化涂层可有效提高铝合金表面的热控性能。这得益于微弧氧化过程中所生成的Y2O3,它可有效调控涂层的形貌、粗糙度和厚度。此外,由于Y2O3具有较大的禁带宽度,可降低微弧氧化涂层中ZnO在高能紫外光波段的吸收。 |
英文摘要: |
To improve the surface thermal control performance of aluminum alloy. Using Y(NO3)3.6H2O as rare earth modifier, ZnO/Y2O3/Al2O3 coating was fabricated on the aluminum alloy surface by micro-arc oxidation technology. The crystal structure, chemical composition and surface morphology of the coating were analyzed by powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM). In addition, the emissivity and absorptivity of the coating were measured by infrared emissivity meter and ultraviolet/visible/near-infrared spectrophotometer respectively, and then the thermal control performance of the coating and its influencing factors were explored. The results show that the amount of Y(NO3)3.6H2O can significantly affect the structure and thermal control performance of the coating. When the concentration of Y(NO3)3.6H2O is 6 g/L, the emissivity and absorptivity of ZnO/Y2O3/Al2O3 coating are 0.859 and 0.405, respectively, a minimum absorptivity/emissivity ratio of 0.471, showing excellent thermal control performance. Y modified micro-arc oxidation coating can effectively improve the thermal control performance of aluminum alloy surface. This is due to the formation of Y2O3 in micro-arc oxidation process, which can effectively control the morphology, roughness and thickness of the coating. In addition, because of the large band gap of Y2O3, the absorption of ZnO based micro-arc oxidation coating in high-energy ultraviolet band can be reduced. |
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