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Minute DLC particles may be generated during running of DLC-coated rolling elements and cause further damage on the subsequent running. Their hardness, which is a key parameter in wear is, however, impossible to measure by conventional means. Are they as hard as the original DLC coating or softened by frictional heat? This paper proposes to make use of the Raman intensity ratio (I D /I ...
The presence of hard contaminants in lubrication can lead to the premature failure of rolling bearings. To reduce the negative effect of such contaminants, hard carbon-based coatings (diamond-like carbon; DLC) can be applied to the surfaces of steel bearings. DLC coatings generate a low friction and a high sliding wear resistance to enhance the tribological properties and improve the durability of...
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