Enhanced glass forming ability and mechanical properties of new Cu-based bulk metallic glasses

Y. C. Kim; J. C. Lee; P. R. Cha; J. P. Ahn; E. Fleury

doi:10.1016/j.msea.2006.07.141

Enhanced glass forming ability and mechanical properties of new Cu-based bulk metallic glasses

Y. C. Kim, J. C. Lee, P. R. Cha, J. P. Ahn, E. Fleury

GREEN SCHOOL (Graduate School of Energy and Environment)

Research output: Contribution to journal › Article › peer-review

64 Citations (Scopus)

Abstract

The thermal stability, glass forming ability and mechanical properties of Cu-Zr-Al-M (M = Ag, Be) bulk metallic glass alloys have been investigated. The glass forming ability in the Cu-Zr-Al-M (M = Ag, Be) alloys increased proportionally to the Ag or Be content and show good correlations with thermal parameters such as ΔT_x (=T_x - T_g), T_rg (=T_g/T_l) and γ (=T_x/(T_g + T_l)), where T_g, T_x, and T_l are glass transition, crystallization, and liquidus temperatures, respectively. Particularly, for the Cu₄₃Zr₄₃Al₇Be₇ alloy, the supercooled liquid region reached 103 K, and fully amorphous rods up to 12 mm in diameter were successfully fabricated by copper mold casting. Ag containing alloy shows large ductility due to phase separation and Be containing alloy shows high compressive strength due to high packing density.

Original language	English
Pages (from-to)	248-253
Number of pages	6
Journal	Materials Science and Engineering A
Volume	437
Issue number	2
DOIs	https://doi.org/10.1016/j.msea.2006.07.141
Publication status	Published - 2006 Nov 15

Keywords

Cu-based bulk metallic glass
Glass forming ability
Mechanical properties
Thermal stability

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Enhanced glass forming ability and mechanical properties of new Cu-based bulk metallic glasses",

abstract = "The thermal stability, glass forming ability and mechanical properties of Cu-Zr-Al-M (M = Ag, Be) bulk metallic glass alloys have been investigated. The glass forming ability in the Cu-Zr-Al-M (M = Ag, Be) alloys increased proportionally to the Ag or Be content and show good correlations with thermal parameters such as ΔTx (=Tx - Tg), Trg (=Tg/Tl) and γ (=Tx/(Tg + Tl)), where Tg, Tx, and Tl are glass transition, crystallization, and liquidus temperatures, respectively. Particularly, for the Cu43Zr43Al7Be7 alloy, the supercooled liquid region reached 103 K, and fully amorphous rods up to 12 mm in diameter were successfully fabricated by copper mold casting. Ag containing alloy shows large ductility due to phase separation and Be containing alloy shows high compressive strength due to high packing density.",

keywords = "Cu-based bulk metallic glass, Glass forming ability, Mechanical properties, Thermal stability",

author = "Kim, {Y. C.} and Lee, {J. C.} and Cha, {P. R.} and Ahn, {J. P.} and E. Fleury",

year = "2006",

month = nov,

day = "15",

doi = "10.1016/j.msea.2006.07.141",

language = "English",

volume = "437",

pages = "248--253",

journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",

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T1 - Enhanced glass forming ability and mechanical properties of new Cu-based bulk metallic glasses

AU - Kim, Y. C.

AU - Lee, J. C.

AU - Cha, P. R.

AU - Ahn, J. P.

AU - Fleury, E.

PY - 2006/11/15

Y1 - 2006/11/15

N2 - The thermal stability, glass forming ability and mechanical properties of Cu-Zr-Al-M (M = Ag, Be) bulk metallic glass alloys have been investigated. The glass forming ability in the Cu-Zr-Al-M (M = Ag, Be) alloys increased proportionally to the Ag or Be content and show good correlations with thermal parameters such as ΔTx (=Tx - Tg), Trg (=Tg/Tl) and γ (=Tx/(Tg + Tl)), where Tg, Tx, and Tl are glass transition, crystallization, and liquidus temperatures, respectively. Particularly, for the Cu43Zr43Al7Be7 alloy, the supercooled liquid region reached 103 K, and fully amorphous rods up to 12 mm in diameter were successfully fabricated by copper mold casting. Ag containing alloy shows large ductility due to phase separation and Be containing alloy shows high compressive strength due to high packing density.

AB - The thermal stability, glass forming ability and mechanical properties of Cu-Zr-Al-M (M = Ag, Be) bulk metallic glass alloys have been investigated. The glass forming ability in the Cu-Zr-Al-M (M = Ag, Be) alloys increased proportionally to the Ag or Be content and show good correlations with thermal parameters such as ΔTx (=Tx - Tg), Trg (=Tg/Tl) and γ (=Tx/(Tg + Tl)), where Tg, Tx, and Tl are glass transition, crystallization, and liquidus temperatures, respectively. Particularly, for the Cu43Zr43Al7Be7 alloy, the supercooled liquid region reached 103 K, and fully amorphous rods up to 12 mm in diameter were successfully fabricated by copper mold casting. Ag containing alloy shows large ductility due to phase separation and Be containing alloy shows high compressive strength due to high packing density.

KW - Cu-based bulk metallic glass

KW - Glass forming ability

KW - Mechanical properties

KW - Thermal stability

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