Structure and Tribological Properties of Ni–Cr–Al-Based Gradient Coating Prepared by Detonation Spraying

In this paper, Ni–Cr–Al coatings were deposited using the detonation spraying method. The aim was to investigate how technological parameters influence coating structure formation, phase composition and tribological performances. We observed that degree which barrel is filled with an O2/C2H2 gas mixture strongly influences chemical of manufactured coatings. High degrees filling led a decrease in aluminum content coating. Filling 40% 50% produced sprayed only Ni–Cr phases could be found. When reduced up 25%, Ni–Al began form Gradient by gradually reducing from 25%. These are characterized near substrate level at higher levels. results obtained confirm gradient exhibit high hardness as well good wear resistance.