Abstract
This study investigated the high-temperature wear behavior and the failure mechanism of TiAlSiN coating under thermal-mechanical coupling. The results indicate that increased temperature significantly promotes coating oxidation, forming a complete wear-resistant layer. However, coating hardness decreases significantly at elevated temperatures, deteriorating the wear property. Increased load generates higher friction heat and intensifies coating oxidation, but it accelerates oxide film fracture and spalling. Mechanical stress causes oxide film fracture, spalling and removal, while high-temperature oxidation triggers cracks healing, debris connection and oxide film re-formation. Oxide film exhibits a dynamic cycle of formation-breaking-formation in high-temperature wear.
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