Effect of the Chemical Composition of Electrode Materials and Deposition Conditions on the Properties of Spark-Deposited Coatings.
I. Mass Transfer Intensity and Composition of the Coatings

Abstract

Coatings of cermets based on Ni–Al alloys and titanium–chromium diboride are spark-deposited onto 40Kh steel. The influence of metal and refractory phase ratio in the electrode material and deposition conditions on the mass-transfer kinetics, thickness, and composition of the coatings is studied. Higher metal content of the electrode material activates mass transfer and increases the thickness of the coatings (up to 700 µm). the integrity, roughness, and thickness of the coatings can be controlled by varying the spark deposition conditions and chemical composition of the electrodes.