Friction and Wear of Porous Sliding Bearings at High Temperature. Influence of MoS2 Nanoparticle Solid Lubricant

The paper is devoted to analysis of friction and wear of real porous sliding bearings modified with solid lubricant layers at high temperature. For this purpose, a special homemade friction tester was applied. The technology of sleeve nitriding is described. The results of the friction tests reveal about the achievement of quasi-hydrodynamic lubrication regime of powder bearings. The lowest friction coefficient is found to be f = 0.04 at 300A degrees C. The great effect of wear rate diminishing is obtained at 300A degrees C as interaction of microasperities is preserved at the sliding interface in quasi-hydrodynamic lubrication regime.