Patent ID: 11873551
Assignee: CITY UNIVERSITY OF HONG KONG
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. An ultraflat and ultralow-friction metallic glass thin film, the metallic glass thin film being a binary alloy, wherein a content of a first metal element of the binary alloy is between 45 atomic % and 64 atomic %, the metallic glass thin film having 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 and a friction coefficient below 1×10−2, the metallic glass thin film being treated by ion bombardment such that it is thermally ultrastable;
and wherein the first metal element is copper or nickel and a second metal element is zirconium or niobium, such that the binary alloy is a copper-zirconium binary alloy or a nickel-niobium binary alloy.