Abstract
A high-temperature self-lubricating composite NiAl–Cr–Mo–CaF2 was fabricated using the powder metallurgy technique, and the tribological behavior of the composite at a wide range of temperatures (room temperature to 1000 °C) was investigated. The results showed that the composite had a favorable friction coefficient of about 0.2 and an excellent wear resistance of about 1 × 10−5 mm3N−1m−1 at the high temperatures tested (800 and 1000 °C). The excellent self-lubricating performance was attributed to the formation of the glaze film on the worn surface consisting mainly of CaCrO4 and CaMoO4 as high-temperature solid lubricants.
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