Effect of Load on Surface Friction and Wear Behavior in ZrCuNiAl Bulk Amorphous Alloy

摘要

A plate-like Zr_(55)Cu_(30)Ni_5Al_(10) bulk amorphous alloy (BAA) with a dimension of 1 × 10 × 70 mm~3 was prepared by using copper-mold suction-casting and the effect of load on the room-temperature surface dry friction and wear behavior was studied. The results showed the grinding traces of the BAA specimens remain an amorphous structure after friction and wear tests through 8 minutes under a load range from 2 to 10 N with a rotational velocity of 500 r/min. The friction coefficients mainly locate between 0.15 and 0.30. With the increase of load, the average friction coefficient presents a downward trend, while the wear weight loss increases gradually. Obvious molten characteristics can be observed in all grinding traces. At smaller loads, the wear mechanism tends to the continuous wear. When the load becomes larger, the wear inclines to the surface flow and adhesion wear co-action mechanism.