Friction and Wear Behavior of Al₂O₃-13%TiO₂ / Iron-Based Amorphous AlloyComposite Coating at Room Temperature

Composite coating of Fe₄₅Cr₁₆Mo₁₆C₁₈B₅ iron-based amorphous alloy containing 15wt% Al₂O₃-13% TiO₂ ceramic phase was prepared by plasma spraying technology, and was subjected to a pin-disk friction and wear test. By comparing with those of iron-based amorphous alloy coating, the friction and wear behavior of the composite coating under different loads (20, 30, 50 N) and pin rotational speeds (300, 500, 800 r·min^-1) was studied, and its wear mechanism was analyzed. The results show that when the pin rotational speed was 300 r·min^-1, the wear rate of the composite coating decreased by nearly 50% compared with that of the iron-based amorphous alloy coating under different loads, and the wear mechanism of the composite coating changed from abrasive wear to fatigue wear as the load increased. When the load was 30 N, the wear scar depth and wear rate of the composite coating first increasd and then decreasd with the increase of the pin rotational speed, both reached the maximum at 500 r·min^-1. When the pin rotational speed was 500 r·min^-1 and 800 r·min^-1, the wear mechanism of the composite coating was adhesive wear.