On plasma sprayed WSi₂ and Cr₃C₂–Ni coatings

WSi₂ and Cr₃C₂–Ni composite powders were applied to AISI 321 and 347, and Nimonic 80 A substrates by the plasma spray process in a nontransferred arc mode. The adhesive shearing strength, the adhesive tensile strength, and the fatigue resistance of the coatings were evaluated. The wear properties of the two coatings on AISI 347 and pin‐on‐disk tests were compared. Corrosion resistance of the two coatings was determined in 1n‐H₂SO₄ by current density‐potential diagrams.