Structure, Hardness and Wear Resistance of Detonation Coating Based on Eutectic Alloy Fe-TiB₂-CrB₂ after Pulse-Plasma Treatment

In the present work, the results of investigation of the influence of pulse plasma treatment on the structure, phase composition, hardness, roughness and wear resistance of $\mathrm{Fe}-\mathrm{TiB} 2-\mathrm{CrB} 2$-based coatings are presented. The Fe-TiB2CrB2 coating was obtained by detonation sputtering. Subsequent pulse plasma treatment was applied to change the structure and improve the properties of the surface layers of the sprayed coating. Mechanical tests showed that the hardness of $\mathrm{Fe}-\mathrm{TiB} 2-\mathrm{CrB} 2$ coating increases significantly after such treatment. Tribological tests demonstrated that after pulse plasma treatment the coating has increased wear resistance. According to the results of X-ray structural analysis, this is due to the increased content of $(\mathrm{Ti}, \mathrm{Cr}) \mathrm{B} 2$ phases, which are known for their high wear resistance. In the subsurface layer of the coating after pulsed plasma treatment, a significant reduction in the number of pores to minimum levels is observed due to melting