Solid Lubricant Containing Coatings for Cylinder Liners in Pressure Casted Aluminum Crankcases

This paper evaluates a wide range of thermal spray coatings for potential use lining cylinder bores in aluminum engines. Coatings were applied by atmospheric plasma spraying (APS) and high-velocity oxyfuel (HVOF) techniques. More than a dozen coating materials were screened, including ceramics, cermets, and metals. The paper describes the equipment and procedures used in the investigation and assesses the resulting coatings based on their microstructure, hardness, friction coefficient, wear resistance, bonding strength, and residual stress.