Crystallization behavior of preannealed bulk amorphous alloy Zr 62Al8Ni13Cu17

Xiao Dong Wang; Hoseong Lee; Seonghoon Yi

doi:10.1016/j.matlet.2005.10.080

Crystallization behavior of preannealed bulk amorphous alloy Zr ₆₂Al₈Ni₁₃Cu₁₇

Xiao Dong Wang, Hoseong Lee, Seonghoon Yi

Kyungpook National University

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

25 Scopus citations

Abstract

Isochronal and isothermal heating methods by differential scanning calorimetry (DSC) were used to investigate the effects of sub-T_g relaxation on the subsequent crystallization of a Zr₆₂Al ₈Ni₁₃Cu₁₇ bulk amorphous alloy. It was found that the activation energy by Kissinger's equation couldn't fit to describe the crystallization behavior of the samples after preannealing. Actually, pre-annealing decreased the incubation time by promoting the formation of critical clusters while increased the activation energy for the following growth. Avrami exponents for the as-quenched samples kept a constant of about 3.5∼3.9 but for the pre-annealed samples deviated from the linear Johnson-Mehl-Avrami (JMA) mode. The different nucleation and growth mechanism affected by structural relaxation was explored.

Original language	English
Pages (from-to)	935-938
Number of pages	4
Journal	Materials Letters
Volume	60
Issue number	7
DOIs	https://doi.org/10.1016/j.matlet.2005.10.080
State	Published - Apr 2006

Keywords

Activation energy
Avrami exponent
Crystallization
Morphology
Sub-T relaxation

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10.1016/j.matlet.2005.10.080

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title = "Crystallization behavior of preannealed bulk amorphous alloy Zr 62Al8Ni13Cu17",

abstract = "Isochronal and isothermal heating methods by differential scanning calorimetry (DSC) were used to investigate the effects of sub-Tg relaxation on the subsequent crystallization of a Zr62Al 8Ni13Cu17 bulk amorphous alloy. It was found that the activation energy by Kissinger's equation couldn't fit to describe the crystallization behavior of the samples after preannealing. Actually, pre-annealing decreased the incubation time by promoting the formation of critical clusters while increased the activation energy for the following growth. Avrami exponents for the as-quenched samples kept a constant of about 3.5∼3.9 but for the pre-annealed samples deviated from the linear Johnson-Mehl-Avrami (JMA) mode. The different nucleation and growth mechanism affected by structural relaxation was explored.",

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T1 - Crystallization behavior of preannealed bulk amorphous alloy Zr 62Al8Ni13Cu17

AU - Wang, Xiao Dong

AU - Lee, Hoseong

AU - Yi, Seonghoon

PY - 2006/4

Y1 - 2006/4

N2 - Isochronal and isothermal heating methods by differential scanning calorimetry (DSC) were used to investigate the effects of sub-Tg relaxation on the subsequent crystallization of a Zr62Al 8Ni13Cu17 bulk amorphous alloy. It was found that the activation energy by Kissinger's equation couldn't fit to describe the crystallization behavior of the samples after preannealing. Actually, pre-annealing decreased the incubation time by promoting the formation of critical clusters while increased the activation energy for the following growth. Avrami exponents for the as-quenched samples kept a constant of about 3.5∼3.9 but for the pre-annealed samples deviated from the linear Johnson-Mehl-Avrami (JMA) mode. The different nucleation and growth mechanism affected by structural relaxation was explored.

AB - Isochronal and isothermal heating methods by differential scanning calorimetry (DSC) were used to investigate the effects of sub-Tg relaxation on the subsequent crystallization of a Zr62Al 8Ni13Cu17 bulk amorphous alloy. It was found that the activation energy by Kissinger's equation couldn't fit to describe the crystallization behavior of the samples after preannealing. Actually, pre-annealing decreased the incubation time by promoting the formation of critical clusters while increased the activation energy for the following growth. Avrami exponents for the as-quenched samples kept a constant of about 3.5∼3.9 but for the pre-annealed samples deviated from the linear Johnson-Mehl-Avrami (JMA) mode. The different nucleation and growth mechanism affected by structural relaxation was explored.

KW - Activation energy

KW - Avrami exponent

KW - Crystallization

KW - Morphology

KW - Sub-T relaxation

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DO - 10.1016/j.matlet.2005.10.080

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JO - Materials Letters

JF - Materials Letters

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Crystallization behavior of preannealed bulk amorphous alloy Zr ₆₂Al₈Ni₁₃Cu₁₇

Abstract

Keywords

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