SURFACE COATING METHOD OF ALUMINUM MEMBER, SURFACE COATED ALUMINUM MEMBER AND PISTON FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a surface coating method of an aluminum member having both a high adiabaticity and a high uniform heat property, a surface coated aluminum member and a piston for an internal combustion engine.SOLUTION: A surface coated aluminum member has at least a first coated film 2 on a surface of an aluminum member 1 and a second coated film 3 having a higher thermal conductivity than that of the first coated film 2 on a surface of the first coated film 2.