Abstract: The tribological properties of TZP ceramics under solid lubrication up to 600℃ were investigated. Using either graphite or MoS₂ can reduce the friction coefficient and wear rate of
TZP/Si₃N₄ sliding couple from 25 to 600℃, however, their lubricating characteristics can be deteriorated due to the oxidation of these lubricants over excessive high temperature. Using CeO₂
and Cu can reduce the wear rate of TZP ceramics, but they don’t have apparently influence on the friction coeffcient. CeF₃ has good lubricating properties at high temperature, which is due to its completed crystallization and orientation alone (002) plane.

Key words: TZP ceramics, friction, wear, lubrication