This paper describes the development of novel engineered surfaces based on thermal spray coatings for sliding wear resistance under conditions of high loading and starved lubrication. As specific examples, piston ring elements for internal combustion engines and radial bearings for medium-lubricated pumps are discussed. The properties of two coatings, SUME SOL 220 and SUME SOL 320, are compared with existing materials and coatings. It was found that SUME SOL 220 exhibited excellent sliding wear resistance under boundary (oil) lubrication. As a consequence, they are considered as attractive candidates for piston ring applications in heavy duty engines. For more corrosive applications, such as encountered in sea water environments, the SUME SOL 320 coating exhibited superior combinations of sliding wear and corrosion resistance. Paper includes a German-language abstract.

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