公开(公告)号：US11873551B2

公开(公告)日：2024-01-16

申请号：US17705367

申请日：2022-03-27

Applicant: City University of Hong Kong

Inventor： Jian Lu ,  Jialun Gu ,  Yan Bao

IPC: C22C45/04 ,  C22C45/10 ,  C23C14/35 ,  C23C14/16 ,  C22C45/00

CPC classification number: C23C14/35 ,  C22C45/001 ,  C22C45/04 ,  C22C45/10 ,  C23C14/16

Abstract: An ultraflat and ultralow-friction metallic glass thin film is fabricated. The metallic glass thin film is a binary alloy, wherein a content of one metal element of the binary alloy is between 45 atomic % and 64 atomic %. The metallic glass thin film has an atomically smooth surface with a surface roughness Ra less than 0.1 nm and a total height of profile Rt less than 0.15 nm; the friction coefficient is below 1×10−2. Due to the metallic glass thin film being treated by ion bombardment, the metallic glass thin film is thermally ultrastable.