Strengthening of plasma-spraying coats by power impulse modulation of plasmatron direct arc

Abstract

Plasma-spraying process with the use of indirect and direct arcs is taken up. The coat strengthening is realized by local weld penetration of the coat in equally spaced zones by power impulse modulation of the plasmotron direct arc. Theoretically estimated modes of strengthening, providing coat weld penetration till the transition zone of the coat base and satisfying the surface exploitation loads are presented.