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

Graduate Institute of Materials Science and Engineering

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

1 Scopus citations

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.

Original language	English
Pages (from-to)	1-5
Number of pages	5
Journal	Journal of Non-Crystalline Solids
Volume	510
DOIs	https://doi.org/10.1016/j.jnoncrysol.2018.12.026
State	Published - 15 Apr 2019

Keywords

Amorphous alloy
Free volume
Glass transition temperature
Incubation time
KWW-exponent β

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10.1016/j.jnoncrysol.2018.12.026

Development of the Open-Cell Toxic-Element-Free Ti-Based Bulk Metallic Glass Foams(3/3)
Jang, S.-C. (PI)
1/08/18 → 31/07/19
Project: Research
孔洞漸層之客製化海綿骨置換體開發-孔洞漸層之客製化海綿骨置換體開發(1/3)
Jang, S.-C. (PI)
1/09/17 → 31/07/18
Project: Research

Cite this

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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

Abstract

Keywords

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Projects

Development of the Open-Cell Toxic-Element-Free Ti-Based Bulk Metallic Glass Foams(3/3)

孔洞漸層之客製化海綿骨置換體開發-孔洞漸層之客製化海綿骨置換體開發(1/3)

Cite this