Abstract

Abstract One of the most recent success stories for thermal spray in the automotive industry involves the development of plasma transferred wire arc (PTWA) for aluminum engine blocks. Driven by the demand to increase fuel efficiency, automakers are placing emphasis on decreasing overall vehicle weight as well as improving engine efficiency by reducing internal friction losses. The surface structure of the composite coating created by the PTWA process promotes favorable lubrication, low friction, wear resistance, improved heat transfer, and decreased bore distortion in engine block cylinders.

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