New method for determination of hidden supercooled liquid region of TiZr-based amorphous alloys

T. H. Li; Y. C. Liao; S. M. Song; V. T. Nguyen; P. H. Tsai; J. S.C. Jang; J. C. Huang

doi:10.1016/j.jnoncrysol.2018.12.026

New method for determination of hidden supercooled liquid region of TiZr-based amorphous alloys

T. H. Li, Y. C. Liao, S. M. Song, V. T. Nguyen, P. H. Tsai, J. S.C. Jang, J. C. Huang

材料科學與工程研究所

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

1 引文斯高帕斯（Scopus）

摘要

TiZr-based metallic glass has a unique glass transition point. It is located at the top of the first exothermic peak instead of at the typical endothermic transformation reaction before the supercooled liquid region (∆T _x ). It is hard to identify the glass transition temperature (T _g ) and ∆T _x of these TiZr-based amorphous alloys by an exothermic-exothermic reaction. In this study, based on the physical characteristics of the free volume reduction, KWW-exponent β, the activation energy for structural relaxation (Q _relax ), and the incubation time by isothermal annealing in DSC analyses, the exact T _g point can be precisely identified. As a result, the Ti ₄₂ Zr ₄₂ Ta ₃ Si ₁₀ Sn ₃ amorphous alloy presents an extra-wide supercooled liquid region (∆T _x ), up to 149 K.

原文	???core.languages.en_GB???
頁（從 - 到）	1-5
頁數	5
期刊	Journal of Non-Crystalline Solids
卷	510
DOIs	https://doi.org/10.1016/j.jnoncrysol.2018.12.026
出版狀態	已出版 - 15 4月 2019

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10.1016/j.jnoncrysol.2018.12.026

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title = "New method for determination of hidden supercooled liquid region of TiZr-based amorphous alloys",

abstract = " TiZr-based metallic glass has a unique glass transition point. It is located at the top of the first exothermic peak instead of at the typical endothermic transformation reaction before the supercooled liquid region (∆T x ). It is hard to identify the glass transition temperature (T g ) and ∆T x of these TiZr-based amorphous alloys by an exothermic-exothermic reaction. In this study, based on the physical characteristics of the free volume reduction, KWW-exponent β, the activation energy for structural relaxation (Q relax ), and the incubation time by isothermal annealing in DSC analyses, the exact T g point can be precisely identified. As a result, the Ti 42 Zr 42 Ta 3 Si 10 Sn 3 amorphous alloy presents an extra-wide supercooled liquid region (∆T x ), up to 149 K. ",

keywords = "Amorphous alloy, Free volume, Glass transition temperature, Incubation time, KWW-exponent β",

author = "Li, {T. H.} and Liao, {Y. C.} and Song, {S. M.} and Nguyen, {V. T.} and Tsai, {P. H.} and Jang, {J. S.C.} and Huang, {J. C.}",

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T1 - New method for determination of hidden supercooled liquid region of TiZr-based amorphous alloys

AU - Li, T. H.

AU - Liao, Y. C.

AU - Song, S. M.

AU - Nguyen, V. T.

AU - Tsai, P. H.

AU - Jang, J. S.C.

AU - Huang, J. C.

PY - 2019/4/15

Y1 - 2019/4/15

N2 - TiZr-based metallic glass has a unique glass transition point. It is located at the top of the first exothermic peak instead of at the typical endothermic transformation reaction before the supercooled liquid region (∆T x ). It is hard to identify the glass transition temperature (T g ) and ∆T x of these TiZr-based amorphous alloys by an exothermic-exothermic reaction. In this study, based on the physical characteristics of the free volume reduction, KWW-exponent β, the activation energy for structural relaxation (Q relax ), and the incubation time by isothermal annealing in DSC analyses, the exact T g point can be precisely identified. As a result, the Ti 42 Zr 42 Ta 3 Si 10 Sn 3 amorphous alloy presents an extra-wide supercooled liquid region (∆T x ), up to 149 K.

AB - TiZr-based metallic glass has a unique glass transition point. It is located at the top of the first exothermic peak instead of at the typical endothermic transformation reaction before the supercooled liquid region (∆T x ). It is hard to identify the glass transition temperature (T g ) and ∆T x of these TiZr-based amorphous alloys by an exothermic-exothermic reaction. In this study, based on the physical characteristics of the free volume reduction, KWW-exponent β, the activation energy for structural relaxation (Q relax ), and the incubation time by isothermal annealing in DSC analyses, the exact T g point can be precisely identified. As a result, the Ti 42 Zr 42 Ta 3 Si 10 Sn 3 amorphous alloy presents an extra-wide supercooled liquid region (∆T x ), up to 149 K.

KW - Amorphous alloy

KW - Free volume

KW - Glass transition temperature

KW - Incubation time

KW - KWW-exponent β

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DO - 10.1016/j.jnoncrysol.2018.12.026

M3 - 期刊論文

AN - SCOPUS:85061658053

SN - 0022-3093

VL - 510

SP - 1

EP - 5

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

ER -

New method for determination of hidden supercooled liquid region of TiZr-based amorphous alloys

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