Slow release of fullerene-like WS2 nanoparticles as a superior solid lubrication mechanism in composite matrices

Recently, the efficacy of hollow ''inorganic fullerene-like'' (IF) WS2 nanoparticles as additives for lubrication fluids has been demonstrated. By confining the IF nanoparticles inside a porous and densified solid matrix, prepared by powder metallurgy (PM) techniques, slow release of the IF nanoparticles onto the metal surface alleviates both friction losses and wear, while assuring the mechanical integrity of the composite. The potential ramifications of this work for self-lubricating bearings, gears, etc. are also discussed. (orig.)