Annealing effects on Al/polyimide adhesion in flexible optical solar reflectors

نویسندگان

چکیده

Abstract Flexible optical solar reflectors are made of single and multi-layered metal thin films on polymer substrates will encounter around 6000 thermal cycles exceeding +/-100°C during one year operation in low earth orbit. The candidate film system Inconel/silver (Ag)/Teflon (FEP) recently demonstrated early damage formation (cracks voids) after only a few cycles, most likely due to the poor interfacial properties between Ag FEP. An alternative material that could be used is colourless polyimide, Tormed, instead Additionally, aluminium (Al) has very good with polyimide even cycling suitable properties. adhesion Al/Tormed Ag/Tormed interfaces were evaluated tensile induced delamination. Generally, much higher interface energy compared Ag/Tormed, there no significant degradation bake-out vacuum (200°C, 10 -6 mbar) for 24 hrs. Thus, more robust coating future flexible reflectors.

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ژورنال

عنوان ژورنال: IOP conference series

سال: 2023

ISSN: ['1757-899X', '1757-8981']

DOI: https://doi.org/10.1088/1757-899x/1287/1/012006