Tribological properties of TiAl-Ti₃SiC₂ composites

Abstract

The tribological properties of TiAl-Ti₃SiC₂ composites (TMC) against Si₃N₄ ceramic ball pair at room temperature were investigated through the determination of friction coefficients and wear rates, and the morphologies and compositions of wear debris, worn surfaces of TMC and Si₃N₄ ceramic ball were analyzed. The experimental results showed that TMC with 15wt% Ti₃SiC₂ exhibited relatively excellent tribological properties. The solid-phase self-lubricating tribo-layers formed on the worn surfaces of both TMC with 15wt% Ti₃SiC₂ and Si₃N₄ ceramic ball, which was beneficial to the lower friction coefficient and wear rate.

Keywords

TiAl-Ti₃SiC₂ composites / spark plasma sintering / in situ technique / tribological properties

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