Structure and properties of coatings on Ni base deposited using a plasma jet before and after electron a beam irradiation

Experimental results for structure, morphology, phase composition and measurements of nano- and microhardness, wear resistance, and adhesion of coatings on a Ni base, which were deposited using a plasma jet, before and after pulsed plasma jet and high-current electron beam melting are presented. Newly formed phases like Cr3Ni2 and CrB and intermetallic compounds with molybdenum like Fe7Mo6, Fe3Mo and possibly Fe Mo were found. We also found an effect of phase composition, changed grain dimension and smoothed relief resulting in a factor of three increase in micro- and nanohardness, almost a factor of 20 increase in friction wear resistance and several times increase in coating to substrate adhesion.