Self-lubricating material for micro-mechanical part, e.g. micro-bearing - comprising porous ceramic partly filled with solid, pref. lubricant, impregnated with liq. lubricant to reduce contact pressure and wear

摘要

Self-lubricating material (I) comprises a porous ceramic (II); a first solid (III), which is porous and is dispersed and partly fills the pores of (II); and a second liq. lubricant (IV), which is absorbed in the pores of (III) and (II) without filling (III). (III) is pref. a solid lubricant; and (IV) a perfluoropolyethylene oxide polyether (IVA), Pref. (II)/(III) combinations are Al2O3/graphite, Al2O3/BN and ZrO2/graphite. USE/ADVANTAGE - (I) is used for making micro-mechanical pts. (claimed), esp. sliding pts. of bearings, such as micro-bearing with a dia. of ca. 0.16 mm. Part of the lubricant extends to the surface of (I), reducing the local contact pressure and abrasive wear. (III) ensures that (II) has good bearing properties and facilitates absorption of (IV). If (III) consists of solid lubricant, any detached particles are lubricating.