Formation of Porous Nanostructure Cobalt Oxide Electrodeposits on Stainless Steel 304 Surface Used as Solar Absorber | ||
| Arab Journal of Nuclear Sciences and Applications | ||
| Article 18, Volume 52, Issue 3, July 2019, Pages 169-180 PDF (1.48 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ajnsa.2019.5690.1142 | ||
| Authors | ||
| Ahmed Mohamed Raslan* 1; Moataz Mohamed Nabile2; Abdel Aziz Fahmy Waheed3; Randa Abdel Karim Mohamed4 | ||
| 1319 Al Shabab St 2 | ||
| 2Metallurgy Department, Faculty of Engineering, Cairo University | ||
| 3Materials Division, Metallurgy Department, Nuclear Research Center, Atomic Energy Authority, Cairo, Egypt | ||
| 4Metallurgical Department, Faculty of Engineering, Cairo University, Giza, Egypt | ||
| Abstract | ||
| Cobalt oxide layers was formed on a stainless steel type 304 surface after annealing heat treatment (400 oC / 10 hr) of the previously electrodeposited pure cobalt coating. The influence of heat treatment on surface morphology of pure cobalt films deposited has been studied. Crystallite structure transformation from hexagonal system to cubic system occurs. The coating layer morphology change from nano platelets to nano flecks was observed. SEM and EDAX are used for monitoring the gradually changes in the coated surface and nanostructure formation behavior. The degree of crystallitey and crystallite size changes, due to annealing at 400 oC/10 hrs, was measured by using XRD device. The optical properties were investigated by using UV-IR Spectrometry to study the effect of the formed surface coating at different electrodeposition conditions on the solar energy absorption behavior. The optimal solar absorptance was 98% at visible light wavelength range (400- 750 nm) for the films after annealing heat treatment. | ||
| Keywords | ||
| Cobalt oxide layers; degree of crystallitey; annealing heat treatment | ||
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