Open AccessPLASMA COATING FORMATION BY THE DEPOSITION OF CATHODE MATERIAL ERODED THROUGH HIGH-CURRENT PULSED DISCHARGE
Author(s) -
Yu. G. Chabak,
V.I. Fedun,
В. Г. Ефременко,
Т. В. Пастухова,
B.V. Efremenko
Publication year - 2019
Publication title -
problems of atomic science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.216
H-Index - 17
eISSN - 1562-6016
pISSN - 1682-9344
DOI - 10.46813/2019-123-167
Subject(s) - coating , materials science , cathode , plasma , deposition (geology) , radius , indentation hardness , current (fluid) , substrate (aquarium) , composite material , atomic physics , thermodynamics , chemistry , microstructure , nuclear physics , physics , paleontology , computer security , oceanography , computer science , biology , sediment , geology
The paper analyzes the conditions for the formation of a coating obtained using an electrothermal axial plasma accelerator due to plasma transfer of cathode erosion products. It is shown that by using a cathode of low-melting materials with a high-current pulsed discharge, microdrops are formed and injected from the accelerator falling into the surface to be treated. When colliding with the surface, the drops acquire near-disk shape with a radius of up to 100 μm, cooling on the substrate at a speed of up to 108 K/s. This leads to the formation in the drops of a supersatu-rated solid solution with nonequilibrium structure. The subsequent heat treatment of the coating can result in harden-ing phases precipitation from solid solution causing the increase in coating microhardness.