Effect of cold coating on emissivity and absorptivity of Ti-6Al-4V alloy.
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The article provides experimental analysis of total hemispherical emissivity and absorptivity of Ti-6Al-4V alloy before and after deposition of 1-2 μm gold layer. We measured their dependences on the temperature of thermal radiation (varying from 20 K to 320 K) and confronted these results with mechanically polished copper, i.e. with material known for extremely low emissivity and absorptivity. Galvanic deposition of pure gold resulted in significant lowering of original emissivity of Ti-6Al-4V bare surfaces from 15.8 % to 3.4 % at 300 K and from 4.1 % to 1.1 % at 20 K. Our findings about thermal-radiative properties have practical relevance for an improvement of a low temperature part of an ultra-high vacuum scanning probe microscope (UHV-SPM) designed by our group and could also be useful for other applications and low temperature systems.
提供机构：
International Institute of Refrigeration (IIR)
创建时间：
2017-10-18
