热循环对某热控涂层热辐射的影响

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热循环对某热控涂层热辐射的影响
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作者单位:北京卫星制造厂
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中图分类号:V416. 5
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Thermal Cycling Effect on Thermal Radiation Properties ofOne Type of Thermal Control Coatings

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摘要:

对某热控涂层进行了快速高低温循环试验( -196 ~900℃),通过太阳吸收比、半球发射率检测和

SEM 形貌等对涂层的热辐射性能进行分析。实验表明,经过热循环后,该涂层保持高吸收比的稳定状态(0. 87

左右),而半球发射率从原始的0. 57 提高到0. 72,最后稳定在0. 75 左右。SEM 微观形貌研究表明,热循环实

验使涂层表面的结晶度和晶粒大小发生变化,导致涂层热辐射性能改变。

Abstract:

We investigated the thermal radiation properties of one type of thermal control coatings with stainless

steel as substrate under thermal cycles. The rapid thermal cycles ranged from -196℃ to 900℃. Solar absorptance,

hemispheric emittance and SEM were measured for analyzing the thermal radiation properties of the coatings. The results

show that solar absorptance of the thermal control coating had little change under thermal cycles, while the cycles

had obvious effect on hemispheric emittance of the coatings, which increased from 0. 57 to 0. 72, and finally the hemispheric

emittance was steady at 0. 75. According to SEM, the surface of the coating was better crystallized under thermal

cycles, and the grain size on the surface of the coating was bigger. The difference of microstructures on the surfaces

of coatings leads to the changes of thermal radiation properties.

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刘洋.热循环对某热控涂层热辐射的影响[J].宇航材料工艺,2015,45(1).

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在线发布日期: 2016-11-28
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