Abstract
Sliding friction experiments were conducted on B4C-TiB2 ceramics and Mo2FeB2 boride base hard alloy (cermet) against themselves. Friction and wear properties were studied by a reciprocal sliding apparatus under the dry condition in air. The test conditions included maximum sliding velocity of 0.019m/s, temperature up to 800°C and normal forces ranging from 2.5N to 33N. Friction coefficients as low as 0.09 to 0.14 were obtained at 800°C for B4C-TiB2. The lowest friction coefficients as well as 0.1 to 0.2 were observed for Fe-61%Mo2FeB2(H50) over the temperature range tested. For most of the sliding pairs, the wear rate was in the range of 10-6 to 10-5 mm3/N⋅m. It was presumably explained that the low coefficient of friction and good wear resistance were caused by the lubrication effect of oxide film.
