Cu-Be base amorphous alloy

Details Cu-Be base amorphous alloy Cu-Be base amorphous alloy

2006-06-06

2006-06-06

Ip, Sikyin (Department: 1742)

Metal treatment

Stock

Amorphous, i.e., glassy

C148S304000

Reexamination Certificate

active

07056394

ABSTRACT:
The present invention provides a Cu—Be based amorphous alloy comprising an amorphous phase of 50% or more by volume fraction. This alloy has a composition represented by the following formula: Cu100-a-bBea(Zr1-x-yHfxTiy)b. In the formula, “a” and “b” represent atomic percentages which are 0<a≦20 and 20≦b≦40, and “x” and “y” represent atomic fractions which are 0≦x≦1 and 0≦y≦0.8. The alloy may contain a small amount of one or more elements selected from the group consisting of Fe, Cr, Mn, Ni, Co, Nb, Mo, W, Sn, Al, Ta and rare-earth elements and/or the group consisting of Ag, Pd, Pt and Au. The alloy has a wide supercooled-liquid temperature range and a large reduced glass transition temperature (Tg/Tm) to achieve a high thermal stability against crystallization or a high glass-forming ability.

REFERENCES:
patent: 5368659 (1994-11-01), Peker et al.
patent: 5618359 (1997-04-01), Lin et al.
patent: 59-126739 (1984-07-01), None
patent: 2002-256401 (2002-09-01), None

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