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Enhancement of the Glass Forming Ability of Cu-Zr-Al Alloys by Ag Addition
김유찬,이재철,김기배,김도향,성도수,권오집,에릭플러리 대한금속·재료학회 2004 METALS AND MATERIALS International Vol.10 No.6
The thermal stability and glass forming ability of Cu50-xZr43Al7Agx (x=0, 1, 3, 5, and 7) bulk metallic glass alloys have been investigated. The glass forming ability in the Cu-Zr-Al-Ag alloys increased proportionally to the Ag content and show good correlations with thermal parameters such as ΔTx(=Tx-Tg), Trg(=Tg/Tl) and γ(=Tx/(Tg+Tl)). For the Cu43Zr43Al7Ag7 alloy, fully amorphous rods of 8 mm diameter were successfully fabricated by copper mold casting. Mechanical tests on this composition revealed also remarkable properties with compressive strength around 2000 MPa and large ductility.