In this study, a series of thermoplastic polyimide (TPI) reinforced poly
(ether ether ketone) (PEEK) blends with varied TPI content were pre-
pared by a hot-pressing method. Friction and wear tests were con-
ducted with a pin-on-disk contact configuration with an elevated
temperature friction and wear tester. The morphologies of the worn
surfaces were observed by scanning electron microscopy and a non-
contact three-dimensional surface profiler. The crystalline structure,
thermal properties, and mechanical properties were comparatively
investigated. The results showed that the thermal endurance, friction-
reducing capacity, and wear resistance were improved with the add-
ition of TPI. It was found that the wear rate of the blends was domi-
nated by the wear temperature rather than the wear tester contact
pressure. The wear mechanism transferred from abrasive wear to adhe-
sive wear when the environmental temperature exceeded the glass
transition temperature. We suggest the 30% TPI/PEEK blends can be
applied as a solid lubricant at elevated temperatures due to its opti-
mum balance between compressive strength, thermal stability, and
wear performance. The results could help to provide some experimen-
tal evidence for the broader application of various polymer blends
affected by their wear resistance at elevated temperatures.