The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2008
Filed:
Jun. 12, 2003
Akihisa Inoue, Miyagi, JP;
Wei Zhang, Miyagi, JP;
Akihisa Inoue, Miyagi, JP;
Wei Zhang, Miyagi, JP;
Japan Science and Technology Agency, Kawaguchi-shi, JP;
Abstract
To provide a Cu-based amorphous alloy having a glass-forming ability higher than that of a Cu—Zr—Ti amorphous alloy and a Cu—Hf—Ti amorphous alloy, as well as excellent workability and excellent mechanical properties without containing large amounts of Ti. A Cu-based amorphous alloy characterized by containing 90 percent by volume or more of amorphous phase having a composition represented by Formula: Cu(Zr,Hf)(Al,Ga)[in Formula, a and b are on an atomic percent basis and satisfy 35 atomic percent≦a≦50 atomic percent and 2 atomic percent≦b≦10 atomic percent], wherein the temperature interval ΔTx of supercooled liquid region is 45 K or more, the temperature interval being represented by Formula ΔTx=Tx−Tg (where Tx represents a crystallization initiation temperature and Tg represents a glass transition temperature.), a rod or a sheet having a diameter or thickness of 1 mm or more and a volume fraction of amorphous phase of 90% or more can be produced by a metal mold casting method, the compressive strength is 1,900 MPa or more, the Young's modulus is 100 GPa or more, and the Vickers hardness is 500 Hv or more.