Abstract
TiAlN solar selective absorbing coatings which were deposited on 304L stainless steel using cathodic arc evaporation method were annealed under non-vacuum at different temperatures with different times. The optical properties (absorptance and emittance) of the coatings were measured by a spectrophotometer. It was found that, after being annealed for 2 hours at different temperatures, the absorptance of the coatings reached the highest value of 0.92 at 700 °C while the emittance got the lowest value of 0.38 at 800 °C. When the coatings were annealed at 600 °C for 24 hours, the optical properties changed to 0.92/0.44 (absorptance/ emittance). By measuring the structure, morphology, elements and surface roughness of the coatings, it was found that both the elemental composition and the surface roughness of the coatings changed as a result of annealing, and these changes caused the change of the optical properties of the coatings.
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Funded by the “863” Hi-Tech Project of China (No.2009AA05Z440)
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Gong, D., Cheng, X., Ye, W. et al. The effect of annealing under non-vacuum on the optical properties of TiALN non-vacuum solar selective absorbing coating prepared by cathodic arc evaporation. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 28, 256–260 (2013). https://doi.org/10.1007/s11595-013-0674-9
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DOI: https://doi.org/10.1007/s11595-013-0674-9