The paper shows the results of studies of the structures of friction surfaces and triboengineering characteristics of biphase ceramics Y-TZP containing 97 mole % ZrO2+3 mole % Y2O3 and alloys TiC-NiTi after friction over a steel disk within a broad range of velocities (0.9-9.4 m/s for the composites with the metallic matrix and 0.2-11.1 m/s for the composites with the ceramic matrix) under a pressure 5 MPa. At slower velocities of friction the wear resistance of Y-TZP and TiC-NiTi depends directly on the capacity of the matrix to undergo martensite transformation, higher velocities do not affect the wear rate. The Y-TZP ceramic produces a continuous transfer layer on the friction surface which acts as a 'soft' protective coating reducing the wear rate at higher friction velocities. When TiC-NiTi is applied, the processes of extrusion of the binder in the softened/molten state from the intercarbide space into the tribocontact zone govern the behavior of materials during friction at velocities >4 m/s.
|Number of pages||10|
|Journal||Trenie i Iznos|
|Publication status||Published - 2001|
ASJC Scopus subject areas
- Mechanics of Materials