Patent ID: 8470103
Filing Date: 2013-06-25
Classification: C22C

Abstract:
1. A method of making a Cu-base bulk amorphous alloy product comprising: preparing an alloy melt consisting essentially of a composition represented by the following formula: Cu casting said alloy melt into a copper mold at an injection pressure of 0.5 to 1.5 kg·f/cm wherein said rod or plate product has an amorphous phase of 90% or more by volume fraction, and wherein said rod or plate product has a compressive fracture strength of 1800 MPa or more, an elongation of 1.5% or more, and a Young's modulus of 100 GPa or more, wherein a supercooled liquid region of said amorphous phase has a temperature interval ΔTx of 25 K or more, said temperature interval being presented by the following formula: ΔTx=Tx−Tg, Tx being a crystallization temperature of said alloy, and Tg being a glass transition temperature of said alloy, wherein said alloy melt has a reduced glass transition temperature of 0.56 or more, said reduced-glass transition temperature being represented by the following formula: Tg/Tm, wherein Tg is a glass transition temperature of said alloy, and Tm is a melting temperature of said alloy.