Thermal spray coatings are being considered as an alternative to the use of cast iron liners in aluminum engine blocks in the automotive industry. In this research, the coatings are applied directly to the cylinder bore by means of a rotating spray gun. A bench wear test has been developed in which parts of real components are tested (cylinder liners and piston rings) so that the geometry, metallurgy, and representative surface finishes of the engine can be preserved and evaluated. The wear mechanism observed in the thermal spray coatings is a combination of surface fatigue and splat delamination. This paper describes the wear behavior of several thermal spray coatings, and compares them to a gray cast iron, a 390 aluminium alloy and a Nikasil coating, with emphasis on microstructural effects.
The effect of microstructure on the wear behavior of thermal spray coatings
Die Auswirkungen der Mikrostruktur auf das Verschleißverhalten von Oberflächenbeschichtungen die durch thermisches Spritzen aufgebracht worden sind
1994
6 Seiten, 11 Bilder, 2 Tabellen, 13 Quellen
Conference paper
English
Automobilindustrie , Oberflächenbehandlung , Oberflächenbeschichten , thermisches Spritzen , Mikrostruktur , Oberflächenschicht , Motorblock , Aluminium , Vergleich (System) , Zylinderbuchse , Verschleißrate , Werkstoffermüdung , Vergleichsmessung , Gusseisen , Aluminiumlegierung , Beschichtungsverfahren , Spritzen , Verschleißmechanismus , Vergleich , Geschwindigkeit , Ermüdung
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