In order to develop materials with good tribological behavior at a wide temperature range (especially
at high temperatures), a series of ZrO2 ( Y2O3 ) matrix composites which contain various of solid lubricants ( Mo、
MoS2、BaF2、CaF2、BaF2 / CaF2、CuO) were prepared by hot-pressing. Among them, ZrO2( Y2O3 ) -Mo-BaF2 / CaF2
composites show low friction coefficient in the range of 800 to 1 000℃. At 1 000℃, the friction coefficient is 0. 28
which is close to the engineering application value. The friction coefficients of the ZrO2(Y2O3) -MoS2 -CaF2 composites
are 0. 30 to 0. 20 when sliding against SiC in the range of 800 to 1 000℃. The ZrO2(Y2O3) -MoS2 -CaF2 composites
have good friction and wear performance over a wide temperature range. The excellent high-temperature tribological
behavior was mainly attributes to the high-temperature stability of the ZrO2 and the high lubricity of molybdate
which formed on the worn surface at high temperature.