Open AccessMass-transfer kinetics, structure, and tribological properties of coatings deposited on steel in Ar or N2+O2 by electro-spark alloying using Cr3C2-NiAl electrodes
Author(s) -
Ph. V. KiryukhantsevKorneev,
А. Д. Сытченко,
В. А. Горшков,
Е. А. Левашов
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/848/1/012087
Subject(s) - nial , materials science , tribology , gravimetric analysis , scanning electron microscope , electrode , metallurgy , profilometer , argon , composite material , surface finish , analytical chemistry (journal) , intermetallic , alloy , chemistry , organic chemistry , chromatography , physics , atomic physics
Multicomponent coatings were obtained by electro-spark alloying using Cr 3 C 2 -NiAl electrodes, in air and in argon medium at direct and opposite polarity. Cr 3 C 2 -NiAl electrodes were manufactured by self-propagating high temperature synthesis. Mass transfer kinetics was determined by gravimetric method. The structure and composition of the coatings were evaluated by scanning electron microscopy and energy-dispersive analysis methods. Friction coefficient was measured using pin-on-disk test. Roughness parameters and wear tracks were studied by optical profilometry. It was found that the opposite polarity in combination with a protective environment is optimal in terms of growth rate, structure and tribological properties. The coatings obtained by the best regime had a relatively low roughness (Ra=4 jm), high wear resistance and a low friction coefficient at the level of 0.18.