This article provides information on thermal spray coating features, which combine to determine the properties of a coating. These include the lamellar or layered splat structure, entrapped unmelted or resolidified particles, pores, oxide inclusions, grains, phases, cracks, and bond interfaces. The article describes the sources of porosity and the factors that control the final coating porosity levels. The article also lists the materials most suitable for thermal spraying processes.
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