Abstract
The tribological properties of TiN – AlN-based composites forming a friction couple with 65G-grade steel under lubricant-free conditions are studied in the speed range of 4–16 m/sec and pressure of 0.5 – 2.0 MPa. The increase both in speed and load causes a decrease in the coefficient of friction. For a speed of 16 m/sec and pressure of 2.0 MPa, the coefficient of friction is 0.16 – 0.11, and the linear wear is 6.0 – 5.7 μm/km. The superior tribological properties of TiN – AlN composites are related to the high mechanical properties of these materials. During friction at high speeds and loads, the abrasive and adhesive wear decreases owing to the oxide films that form on the surface and play the role of a solid lubricant and thus reduce friction loss.
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