Abstract
Gas atomized Al63Cu25Fe12 powders of varying size fractions were plasma sprayed onto hot (~600 °C) and cool (~25 °C) substrates using Mach I and subsonic plasma gun configurations. The chemical composition and phase contents of coatings were determined. Furthermore, coatings were annealed in vacuum at 700 °C for 2 h to observe phase changes. It was found that finer particles (e.g., <25 μm) tend to vaporize Al during spraying, which shifts the coating composition away from the quasicrystalline (ψ) single-phase region in the Al-Cu-Fe phase diagram. Coatings deposited on hot substrates were denser, richer in theψ phase, and harder than the corresponding coatings deposited onto cool substrates.
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Sordelet, D.J., Besser, M.F. & Anderson, I.E. Particle size effects on chemistry and structure of Al-Cu-Fe quasicrystalline coatings. JTST 5, 161–174 (1996). https://doi.org/10.1007/BF02646430
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DOI: https://doi.org/10.1007/BF02646430