▎ 摘　　要

Tribological behavior of TiAl-multilayer graphene-Ag composites (TMACs) prepared by spark plasma sintering against a Si3N4 ball was investigated on a ball-on-disk high-temperature tribometer at different test temperatures and sliding speeds in this study. The test results showed that TMACs had the lower friction coefficient and less wear rate at 450 degrees C-0.25 m/s, which was attributed to the formation of the high-strength and intact tribofilms on worn surface. At 450 degrees C-0.25 m/s, during the sliding process, multilayer graphene (MLG) was ground out to form the high-strength skeletons on the worn surface of TMACs. Ag was migrated from the worn surface and combined with the MLG skeleton to form the high-strength and intact tribofilms. The high-strength and intact tribofilms were beneficial to lowering the friction coefficient for the lubricating effect of Ag and decreasing wear rate for the enhancing effect of MLG skeleton.