Stainless Steel - CuNP Selective Surfaces Coated by Thermal Evaporation Technique.
Ahmed S. Abbas Mohammed J. Kadhim Khalid A. Sukkar
AbstractStainless steel - copper nanoparticles selective surfaces were deposited by a thermal evaporation technique. Stainless steel type 316L (316L SS) was chosen as a substrate, while the copper nanoparticles (CuNP) were deposited on 316L SS by physical vapor deposition (PVD). The absorption and emissivity were also measured in the UV-Vis and IR regions respectively. The results show that the prepared film by PVD has an enchantment in optical properties. A solar absorption of 0.78- 0.94 and thermal emissivity of 0.01-0.05 at room temperature has been achieved for the 316L SS-CuNP solar selective coatings. Also, the results displayed that the presence of copper nanoparticles combined with 316L SS has a better performance than 316L SS alone. The absorption and the emissivity have been an improvement; in addition to a good thermal stability have been obtained. The improvement of the solar absorber using CuNP combined with 316L SS was found to be better than CuNP singly. Other characteristics like structure and phases of coating layers achieve investigated using XRD in another side, topographic was examined via AFM and SEM.