公开(公告)号：US20230143193A1

公开(公告)日：2023-05-11

申请号：US17915409

申请日：2020-10-07

Applicant: HITACHI, LTD.

Inventor： Takuya AOYAGI ,  Hiroshi KANEMOTO ,  Tomio IWASAKI ,  Toshinori KAWAMURA ,  Hitoshi SUZUKI

IPC: C23C22/52 ,  C23C22/77

CPC classification number: C23C22/52 ,  C23C22/77

Abstract: The preset invention has as its object the provision of a laminate free of hexavalent chromium and excellent in corrosion resistance and wear resistance, and a manufacturing process of the laminate. To solve the above-described problems, a laminate according to the present invention includes a substrate, and a laminated film portion with metal films laminated in two or more layers. The laminate has an interface layer between each two adjacent ones of the metal films. The laminated film portion contains a first metal element as a principal component, the first metal element being at least one element of Ni, Cr, Co, and W, and a second metal element that is a metal element of smaller cohesive energy than that of the first metal element. The second metal element contained in the interface layer is at a content ratio higher than that of the second metal element contained in each of the adjacent metal films.