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首页> 外文会议>12th international symposium on materials in the space environment >A HIGH EMISSIVITY WHITE COATING FOR HIGH TEMPERATURE AND HIGH RADIATION ENVIRONMENTS THAT CAN BE APPLIED TO ALUMINIUM SUBSTRATES USING A LOW TEMPERATURE COATING PROCESS
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A HIGH EMISSIVITY WHITE COATING FOR HIGH TEMPERATURE AND HIGH RADIATION ENVIRONMENTS THAT CAN BE APPLIED TO ALUMINIUM SUBSTRATES USING A LOW TEMPERATURE COATING PROCESS

机译：适用于高温和高辐射环境的高发射率白色涂层，可通过低温涂层工艺应用于铝基材料

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摘要

The Bepi Columbo mission to Mercury exposes thernsurfaces of the spacecraft to temperatures in excess ofrn450℃ in a high intensity UV radiation environmentrnequivalent to 10 solar constants. To meet theserndemanding requirements a ceramic based white coatingrnwas developed, Nanovation V14. However, due to thernneed to fire this coating at high temperature (～ 500℃),rnthis coating is not suitable for applying to componentsrnmade from an aluminium alloy. A need was identifiedrnfor a white coating to operate in this environment for thernaluminium housing on the thruster pointing assemblyrn(TPA) of the Mercury Transfer Module (MTM).rnThis paper describes the development and qualificationrnof a white ceramic coating based on Partially StabilisedrnZirconia (PSZ) applied to an aluminium substrate usingrna plasma spraying process. The temperature rise of thernaluminium substrate during the plasma spraying processrnis less than 150℃ and so the mechanical properties ofrnthe underlying aluminium alloy substrate are unaffected.rnThe coating was characterised in terms of thermornoptical performance and adhesion after exposure to arnhigh temperature and high UV radiation test, a bake test,rnthermal cycling and mechanical stressing. Alsornaddressed was the ESD performance of the coating. Thernresults showed that the plasma sprayed PSZ coating onrnan aluminium alloy substrate was suitable for use in thernextreme Bepi Columbo environment.
机译：Bepi Columbo的水星飞行任务使航天器的表面在高强度紫外线辐射环境（相当于10个太阳常数）中暴露于450℃以上的温度下。为了满足苛刻的要求，开发了一种陶瓷基白色涂料Nanovation V14。但是，由于需要在高温（〜500℃）下烧成该涂料，因此不适合用于铝合金制部件。已确定需要在这种环境下运行的白色涂层用于汞传输模块（MTM）的推进器定位组件（TPA）上的铝外壳。本文介绍了基于部分稳定的锆石（PSZ）的白色陶瓷涂层的开发和鉴定。使用RNA等离子喷涂工艺应用于铝基材。在等离子喷涂过程中，铝基板的温度升高小于150℃，因此下面的铝合金基板的机械性能不受影响。涂层在高温，高紫外线辐射测试后具有热磁性能和粘附性，烘烤测试，热循环和机械应力。还解决了涂层的ESD性能。结果表明，等离子喷涂PSZ涂层在铝合金基板上适用于极端的Bepi Columbo环境。

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