Abstract
A study has been made of the friction behaviour and wear resistance in liquid nitrogen medium of pin-and-disc pairs with diamond-like carbon (DLC) coatings deposited onto disc surfaces of varying initial roughness, and in a number of cases onto pin surfaces. The dependence of the coefficient of friction on initial roughness has been shown to be extreme. Peculiarities of microrelief formation at the contact surface and the composition of the wear debris for the DLC-coated mating pairs were observed. Possible mechanisms of friction interaction for diamond-like coatings at cryogenic temperatures are considered.
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