Dry sliding wear behaviors of Fe-based amorphous metallic coating synthesized by d-gun spray

Abstract The Fe-based amorphous coating has been successfully deposited on a 9Ni steel substrate by d -gun spray. The microstructure and wear behaviors of the coating were studied in detail under dry sliding condition in a ball-on-disk mode by using Si3N4 ball as the counterpart. The results show that the Fe-based amorphous coating has a substantially complete amorphous structure, and the thickness, porosity, and surface hardness are 200 ± 30 µm, and 822 ± 10 Hv0.1, respectively. Therefore, the coating presented pretty good wear-resistant properties under dry sliding wear conditions with wear rates of (2.74~16.30) × 10−6 mm3N−1m−1. Besides, the results show that the wear rate of coatings is more sensitive to the applied sliding speed than the normal load. As the sliding speed changes from low (0.1 m s − 1) to high (1.0 m s − 1), the wear mechanism of the present Fe-based amorphous coating changes from oxidative wear to delamination wear.