Effect of substrate surface roughness on properties of cold-sprayed copper coatings on SS316L steel

摘要: Abstract The development of thick pure copper coatings on SS316 substrates with desired properties for Tokamaks is still a challenging task. solution to this task can help fulfill the demanding requirements in-vessel materials plasma passivation. In present work, effect substrate surface roughness several cold-sprayed was investigated. Effect post-heat-treatment developed also studied. were characterized using various techniques viz.; scanning electron microscopy/energy dispersive spectroscopy, X-ray diffraction, optical microscopy, microhardness, nanoindentation, electrical and thermal conductivity measurements, density porosity analyses. novelty article includes in-situ micro-tensile testing understand their fracture mechanism, which showed multi-crack failure. Moreover, cracks found be originating from multi-splat boundary junctions, followed by growth along splat boundaries. Additionally, γ-rays heavy-nuclei irradiation cyclic exposure studies performed elucidate actual environmental performance coatings. mirror-finished have better mechanical physical as compared rough surface; prior as-well-as post-heat-treatment.