Abstract
Dry sliding tribological behaviors of TiAl matrix self-lubricating composites (TMSC) containing varying amounts of Ag, Ti3SiC2 and BaF2/CaF2 eutectic (BaF2–38wt.%CaF2) (ATBC) with weight ratio of 1:1:1 against Si3N4 from room temperature (RT) to 600°C at the condition of 10N–0.234m/s were experimentally studied. The results implied that the ATBC could improve friction-reducing and anti-wear ability of TMSC over an extreme range of operating temperatures, which was attributed to the synergetic effect of Ag, Ti3SiC2 and BaF2/CaF2 lubricants. In addition, TMSC containing 9wt.% ATBC exhibited the best tribological properties over the wide temperature range from RT to 600°C.
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