Structure, Hardness and Wear Resistance of Detonation Coating Based on Cr3C2-NiCr After Pulse-Plasma Treatment

This paper discusses the results of a study of Cr
3
C
2
-NiCr-based detonation coatings after pulse-plasma treatment. It is determined that after pulse plasma treatment (PPT) the surface roughness value decreases by 48% and the coating friction coefficient increases by 2 times, the material microhardness of Cr
3
C
2
-NiCr coatings increases from ~12 GPa (initial) to ~16.2 GPa. It was also revealed that after pulse-plasma treatment the resistance of Cr
3
C
2
-NiCr coatings to abrasion and erosion wear increases. Pulse-plasma treatment provides formation of qualitative coatings from ceramic-metal materials of Cr
3
C
2
-NiCr system with complex heterogeneous structure-phase state where the layered structure of areas of carbide particles and matrix metal in immediate proximity from border “carbide - matrix” with allocation of disperse secondary carbides in matrix is revealed.