Abstract
The present paper reports on a novel process for deposition ofMoS2 lubricating coatings by electrospraying aball-milled platelet suspension of stoichiometric MoS2particles. Ultralow friction coefficients in the range of0.010-0.020, in a dry-nitrogen atmosphere, were obtained with areciprocating ball-on-disk tribometer for a stainless-steel ballsliding on a MoS2-coated silicon substrate. Thesliding endurance for MoS2, as deposited, was measuredfor thicknesses ranging from 0.28 to 1.00 μm tobe between 0.6 and 44 m. The effect of a low-dose, high-energy,argon-ion bombardment was studied. Thus an ion bombardment with400 keV argon ions to a dose of 18 x 1015ions/cm2 increased the sliding endurance by a factorof about thirty, for a coating thickness of 0.3μm.
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