Wear behavior of Er-bearing Cu-based amorphous/crystal BMG composite under oil lubrication

Wear Properties of Sc-Bearing Zr-Based Composite BMG with Nano-CuZr2 under Lubrication

“…The values were within the range from 0.22 to approximately 0.29 under a 20-N load at different sliding velocities. When a softer stationary slider is slid against a moving harder disk, the steady-state coefficient of friction is approximately the same [19]. Therefore, the experimental results clearly indicated that the measured friction coefficients can be determined as the adhesion wear.…”

“…Therefore, the experimental results clearly indicated that the measured friction coefficients can be determined as the adhesion wear. The friction coefficients of the Sc-bearing Zr-based composite BMG were higher than those of the (Cu55Zr40Al5)98Er2 composite BMG (0.13-0.22) [19], as shown in Figure 4. The distance-dependent nature of various friction coefficients can be classified into the following stages [20].…”

“…The average friction coefficient of the Sc-bearing Zr-based composite BMG is almost constant at approximately 0.25 (Figure 3) and is independent of the sliding velocity. This fact indicates that the wear particles entrapped at the interface between the hard disk and the composite BMG remains constant [19]. This difference might be caused by the relatively softer microhardness of the ( [3] in a pin-on-disk test under oil lubrication by using a high carbon and chromium-containing low alloy steel, AISI/ASTM 52100 bearing steel, as the counter surface under a load of 4.95 N at a velocity of 0.25 m/s.…”

“…The average friction coefficient of the Sc-bearing Zr-based composite BMG is almost constant at approximately 0.25 (Figure 3) and is independent of the sliding velocity. This fact indicates that the wear particles entrapped at the interface between the hard disk and the composite BMG remains constant [19]. This difference might be caused by the relatively softer microhardness of the (Zr55Cu30Ni10Al5)99.98Sc0.02 composite BMG at 519 Hv compared with the (Cu55Zr40Al5)98Er2 composite BMG at 530 Hv.…”

“…The patches were plowed across the disk surface, formed cavities, and dragged traces along the wear track. More transferred materials were observed for the (Zr55Cu30Ni10Al5)99.98Sc0.02 composite BMG than for the (Cu55Zr40Al5)98Er2 composite BMG [19,21], and the disk surface was ploughed severely. The SEM (scanning electron microscopy) images of the composite BMG are shown in Figure 6.…”