In this study, ball-milled Al2O3 powder was used as a feedstock material for vacuum kinetic spray to deposit hard ceramic Al2O3 coating on a relatively soft polycarbonate substrate. Microstructural and X-ray diffraction analysis of powders and coatings were performed. The results shows that the ball-milled powder has more unstable state than the primary powder. Compared to primary Al2O3 coating the crystallite size and coating thickness of ball-milled Al2O3 coating are smaller and thicker, respectively. Since the ball-milled Al2O3 particles are more easily fragmented during the VKS coating process, it is possible to deposit hard Al2O3 coating on the soft polycarbonate substrate.

alumina ceramics, ball milling, ceramic powder, microstructural analysis, particle deposition, polycarbonates, vacuum kinetic spraying, X-ray diffraction analysis
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2017
DVS Media GmbH
Topics
Ceramic powder Alumina ceramics Polycarbonates Thermal spray coating Microstructural analysis X-ray diffraction
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