METHOD FOR MODIFYING SURFACE OF ALUMINUM ALLOY AND SLIDING MEMBER

摘要

A surface-modified layer is formed on a piston sliding surface (3) of a cylinder block made of an aluminum alloy by conducting plasma irradiation treatment using nitrogen gas as a working gas, and the nitrogen concentration of hard particles of aluminum nitride that form on the surface-modified layer is set to a weight percent of 5 to 9.5.