Composition dependence of crystal growth and its time evolution in supercooled liquid of Zr-Al-Cu glassy metals

T. Fukami; H. Yamamoto; D. Okai; Y. Yokoyama; T. Yamasaki; A. Inoue

doi:10.1016/j.mseb.2005.07.026

Composition dependence of crystal growth and its time evolution in supercooled liquid of Zr-Al-Cu glassy metals

T. Fukami, H. Yamamoto, D. Okai, Y. Yokoyama, T. Yamasaki, A. Inoue

Institute for Materials Research (IMR)

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

10 Citations (Scopus)

Abstract

Crystal nucleation and its time evolution during isothermal annealing in supercooled liquid of glassy metals Zr₆₅Al₁₀Cu₂₅ ribbon, Zr₅₀Al₁₀Cu₄₀ ribbon, and Zr₅₀Al₁₀Cu₄₀ bulk are examined using a technique of differential thermal analysis. Time dependence of the fraction of crystallization in supercooled liquid at several temperatures is analyzed by the Johnson-Mehl-Avrami (JMA) formula. The Avrami exponents are 3.0 ± 0.2 for Zr₆₅Al₁₀Cu₂₅ ribbon, and 3.9 ± 0.4 for Zr₅₀Al₁₀Cu₄₀ ribbon and Zr₅₀Al₁₀Cu₄₀ bulk. Relation between grown crystals in the supercooled liquid and the Avrami exponent can be explained reasonably. Plots of the fraction of crystallized volume versus a scaled time normalized by the half time of full crystallization almost collapse on a single curve. This suggests that the crystal growth obeys a universal process. The temperature dependence of the half time is discussed using the Williams-Landel-Ferry function.

Original language	English
Pages (from-to)	1-8
Number of pages	8
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	131
Issue number	1-3
DOIs	https://doi.org/10.1016/j.mseb.2005.07.026
Publication status	Published - 2006 Jul 15

Keywords

Avrami exponent
Crystal growth
Diffusion-controlled process
Scaling law
Supercooled liquid
Zr-based glassy metal

ASJC Scopus subject areas

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

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title = "Composition dependence of crystal growth and its time evolution in supercooled liquid of Zr-Al-Cu glassy metals",

abstract = "Crystal nucleation and its time evolution during isothermal annealing in supercooled liquid of glassy metals Zr65Al10Cu25 ribbon, Zr50Al10Cu40 ribbon, and Zr50Al10Cu40 bulk are examined using a technique of differential thermal analysis. Time dependence of the fraction of crystallization in supercooled liquid at several temperatures is analyzed by the Johnson-Mehl-Avrami (JMA) formula. The Avrami exponents are 3.0 ± 0.2 for Zr65Al10Cu25 ribbon, and 3.9 ± 0.4 for Zr50Al10Cu40 ribbon and Zr50Al10Cu40 bulk. Relation between grown crystals in the supercooled liquid and the Avrami exponent can be explained reasonably. Plots of the fraction of crystallized volume versus a scaled time normalized by the half time of full crystallization almost collapse on a single curve. This suggests that the crystal growth obeys a universal process. The temperature dependence of the half time is discussed using the Williams-Landel-Ferry function.",

keywords = "Avrami exponent, Crystal growth, Diffusion-controlled process, Scaling law, Supercooled liquid, Zr-based glassy metal",

author = "T. Fukami and H. Yamamoto and D. Okai and Y. Yokoyama and T. Yamasaki and A. Inoue",

year = "2006",

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doi = "10.1016/j.mseb.2005.07.026",

language = "English",

volume = "131",

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journal = "Materials Science and Engineering B: Solid-State Materials for Advanced Technology",

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T1 - Composition dependence of crystal growth and its time evolution in supercooled liquid of Zr-Al-Cu glassy metals

AU - Fukami, T.

AU - Yamamoto, H.

AU - Okai, D.

AU - Yokoyama, Y.

AU - Yamasaki, T.

AU - Inoue, A.

PY - 2006/7/15

Y1 - 2006/7/15

N2 - Crystal nucleation and its time evolution during isothermal annealing in supercooled liquid of glassy metals Zr65Al10Cu25 ribbon, Zr50Al10Cu40 ribbon, and Zr50Al10Cu40 bulk are examined using a technique of differential thermal analysis. Time dependence of the fraction of crystallization in supercooled liquid at several temperatures is analyzed by the Johnson-Mehl-Avrami (JMA) formula. The Avrami exponents are 3.0 ± 0.2 for Zr65Al10Cu25 ribbon, and 3.9 ± 0.4 for Zr50Al10Cu40 ribbon and Zr50Al10Cu40 bulk. Relation between grown crystals in the supercooled liquid and the Avrami exponent can be explained reasonably. Plots of the fraction of crystallized volume versus a scaled time normalized by the half time of full crystallization almost collapse on a single curve. This suggests that the crystal growth obeys a universal process. The temperature dependence of the half time is discussed using the Williams-Landel-Ferry function.

AB - Crystal nucleation and its time evolution during isothermal annealing in supercooled liquid of glassy metals Zr65Al10Cu25 ribbon, Zr50Al10Cu40 ribbon, and Zr50Al10Cu40 bulk are examined using a technique of differential thermal analysis. Time dependence of the fraction of crystallization in supercooled liquid at several temperatures is analyzed by the Johnson-Mehl-Avrami (JMA) formula. The Avrami exponents are 3.0 ± 0.2 for Zr65Al10Cu25 ribbon, and 3.9 ± 0.4 for Zr50Al10Cu40 ribbon and Zr50Al10Cu40 bulk. Relation between grown crystals in the supercooled liquid and the Avrami exponent can be explained reasonably. Plots of the fraction of crystallized volume versus a scaled time normalized by the half time of full crystallization almost collapse on a single curve. This suggests that the crystal growth obeys a universal process. The temperature dependence of the half time is discussed using the Williams-Landel-Ferry function.

KW - Avrami exponent

KW - Crystal growth

KW - Diffusion-controlled process

KW - Scaling law

KW - Supercooled liquid

KW - Zr-based glassy metal

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Composition dependence of crystal growth and its time evolution in supercooled liquid of Zr-Al-Cu glassy metals

Abstract

Keywords

ASJC Scopus subject areas

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