Al2O3–ZnO–Y2O3 热控涂层在真空紫外辐照下的电阻性能研究,RSC Advances

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Al2O3–ZnO–Y2O3 热控涂层在真空紫外辐照下的电阻性能研究
RSC Advances ( IF 3.9 ) Pub Date : 2022-05-03 , DOI: 10.1039/d2ra00167e
Tao Li ₁ , Hongjun Kang ₁ , Songtao Lu ₁ , Wei Qin ₂ , Xiaohong Wu ₁

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随着深空探测越来越远，在轨航天器的热控涂层将遭受严重的真空-紫外线辐射环境，严重威胁航天器在轨的可靠性。因此，提高热控涂层的抗真空紫外线性能具有重要意义。本工作采用PEO技术在6061铝合金表面原位制备无机Al ₂ O ₃ -ZnO-Y ₂ O ₃热控涂层，并研究其抗真空紫外性能。结果表明，Al ₂ O ₃ –ZnO–Y ₂ O ₃热控涂层具有良好的抗真空-紫外辐射性能，这主要是因为ZnO和Y ₂ O ₃材料在紫外波段具有较大的消光系数，有利于提高抗紫外性能。此外，Al ₂ O ₃ -ZnO-Y ₂ O _{3热控涂层}_的寿命预测模型表明，随着紫外线照射时间从0 ESH增加到25，其Δαs值先略有增加，然后趋于稳定。 000 ESH，Δ α _{s的最大变化量}约为 0.0536。该工作为长寿命、高可靠性航天器热控系统提供了物质基础和技术支撑。

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Study of resistance performance of Al2O3–ZnO–Y2O3 thermal control coating exposed to vacuum-ultraviolet irradiation

As deep space exploration moves farther and farther away, thermal control coating of the in-orbit spacecraft will suffer a serious vacuum-ultraviolet radiation environment, which seriously threatens the reliability of the spacecraft in orbit. Therefore, it is important to improve the vacuum-ultraviolet resistance performance of the thermal control coating. In this work, the inorganic Al₂O₃–ZnO–Y₂O₃ thermal control coating was in situ fabricated on a 6061 aluminum alloy surface by PEO technology, and its vacuum-ultraviolet resistance performance was investigated. The results show that the Al₂O₃–ZnO–Y₂O₃ thermal control coating has a good resistance performance to vacuum-ultraviolet radiation, which is mainly because the large extinction coefficients of the ZnO and Y₂O₃ materials in the ultraviolet band are conducive to improving the ultraviolet resistance performance. Furthermore, the life prediction model of the Al₂O₃–ZnO–Y₂O₃ thermal control coating shows that its Δα_s value first slightly increases and then tends to be stable with the increase of ultraviolet irradiation time from 0 ESH to 25 000 ESH, and the maximum variation of Δα_s is about 0.0536. This work provides a material basis and technical support for the thermal control system of spacecraft with long life and high reliability.

更新日期：2022-05-03

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