pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (24권1호 40-44)
The Influence of (Pd+Ag) Additions on the Glass Forming Ability of Zr-Al-Cu-Ni based Alloys
Zr-Al-Cu-Ni계 합금의 비정질형성능에 미치는 Pd과 Ag 복합첨가의 영향
Mi-Hye Kim, Byung-Woo Lee*, Sung-Gyu Kim*, Cha-Hurn Bae*, Hae-Yong Jeong*
Grauate School of Pukyong National University, *Pukyong National University
The influence of Pd and Ag additions on the thermal stability, the glass forming ability (GFA) and mechanical property of Zr55Al,oCu2oNi,oPd(5_,oAgx (x = 0-5at%) alloys obtained by melt spun and injection casting method have been investigated by using of X-ray diffraction, thermal analysis (DTA, DSC) and micro-Vickers hardness(Hv) testing. The thermal properties of melt-spun Zr55Al,oCu2oNi,oPd(5_x)Agx (x = 0-5at%) alloys exhibit a supercooled liquid region(ATx) exceeding 91 K before crystallization. The largest AT, reaches as large as 126 K for the Zr55Al,oCu2oNi1oPd5 alloy. The reduced glass transition temperature, Trg increased with increasing Ag content. The largest Trg is obtained for the Zr55Al,oCu,oNi,oAg5 alloy. The Zr55Al,oCu,oNi,oAg5 bulk amorphous alloy rod with 3 mm in diameter was fabricated by injection casting. Hv increased with increasing Ag content and the largest value was obtained for the Zr55Al,oCu,oNi,oAg5 bulk amorphous alloy.
Bulk amorphous alloy, Supercooled liquid region, Glass forming ability, Reduced glass transition temperature
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