Abstract
SiC matrix high temperature solid-lubricating composites with addition of different contents of CaF2 and Mo were fabricated by hot pressed sintering, and their tribological behavior was investigated over a broad temperature range between room temperature to 1000°C. It was found SiC matrix composite with addition of 20vol% Mo and 30vol% CaF2 to exhibit excellent solid lubricity and wear resistance. Especially at 1000°C, it has the lowest friction coefficient of 0.17 and a favorable wear rate of 4.08×10−6mm3/Nm. The low friction and wear mechanisms were discussed in detail.
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