Limitation of the Johnson-Mehl-Avrami equation for the kinetic analysis of crystallization in a Ti-based amorphous alloy

Jun Wang; Hong Chao Kou; Hui Chang; Xiao Feng Gu; Jin Shan Li; Hong Zhong; Lian Zhou

doi:10.1007/s12613-010-0309-5

Limitation of the Johnson-Mehl-Avrami equation for the kinetic analysis of crystallization in a Ti-based amorphous alloy

Jun Wang, Hong Chao Kou, Hui Chang, Xiao Feng Gu, Jin Shan Li, Hong Zhong, Lian Zhou

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

7 Scopus citations

Abstract

The primary crystallization of the Ti₄₀Zr₂₅Ni ₈Cu₉Be₁₈ amorphous alloy was studied by sochronal differential scanning calorimetry (DSC). The activation energy was determined by the Kissinger-Akahira-Sunose method. Trying to analyze the crystallization kinetics of the Ti₄₀Zr₂₅Ni ₈Cu₉Be₁₈ amorphous alloy by two different methods, it was found that the crystallization kinetics did not obey the Johnson- Mehl-Avrami equation. A modified method in consideration of the impingement effect was proposed to perform kinetic analysis of the isochronal crystallization of this alloy. The kinetic parameters were then obtained by the linear fitting method based on the modified kinetic equation. The results show that the isochronal crystallization kinetics of the amorphous Ti ₄₀Zr₂₅Ni₈Cu₉Be₁₈ alloy is heating rate dependent, and the discrepancy between the Johnson-Mehl-Avrami method and the modified method increases with the increase of heating rate.

Original language	English
Pages (from-to)	307-311
Number of pages	5
Journal	International Journal of Minerals, Metallurgy and Materials
Volume	17
Issue number	3
DOIs	https://doi.org/10.1007/s12613-010-0309-5
State	Published - Jun 2010
Externally published	Yes

Keywords

Amorphous alloys
Crystallization
Impingement
Johnson-Mehl-Avrami equation
Kinetics

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10.1007/s12613-010-0309-5

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title = "Limitation of the Johnson-Mehl-Avrami equation for the kinetic analysis of crystallization in a Ti-based amorphous alloy",

abstract = "The primary crystallization of the Ti40Zr25Ni 8Cu9Be18 amorphous alloy was studied by sochronal differential scanning calorimetry (DSC). The activation energy was determined by the Kissinger-Akahira-Sunose method. Trying to analyze the crystallization kinetics of the Ti40Zr25Ni 8Cu9Be18 amorphous alloy by two different methods, it was found that the crystallization kinetics did not obey the Johnson- Mehl-Avrami equation. A modified method in consideration of the impingement effect was proposed to perform kinetic analysis of the isochronal crystallization of this alloy. The kinetic parameters were then obtained by the linear fitting method based on the modified kinetic equation. The results show that the isochronal crystallization kinetics of the amorphous Ti 40Zr25Ni8Cu9Be18 alloy is heating rate dependent, and the discrepancy between the Johnson-Mehl-Avrami method and the modified method increases with the increase of heating rate.",

keywords = "Amorphous alloys, Crystallization, Impingement, Johnson-Mehl-Avrami equation, Kinetics",

author = "Jun Wang and Kou, {Hong Chao} and Hui Chang and Gu, {Xiao Feng} and Li, {Jin Shan} and Hong Zhong and Lian Zhou",

year = "2010",

month = jun,

doi = "10.1007/s12613-010-0309-5",

language = "英语",

volume = "17",

pages = "307--311",

journal = "International Journal of Minerals, Metallurgy and Materials",

issn = "1674-4799",

publisher = "University of Science and Technology Beijing",

number = "3",

}

TY - JOUR

T1 - Limitation of the Johnson-Mehl-Avrami equation for the kinetic analysis of crystallization in a Ti-based amorphous alloy

AU - Wang, Jun

AU - Kou, Hong Chao

AU - Chang, Hui

AU - Gu, Xiao Feng

AU - Li, Jin Shan

AU - Zhong, Hong

AU - Zhou, Lian

PY - 2010/6

Y1 - 2010/6

N2 - The primary crystallization of the Ti40Zr25Ni 8Cu9Be18 amorphous alloy was studied by sochronal differential scanning calorimetry (DSC). The activation energy was determined by the Kissinger-Akahira-Sunose method. Trying to analyze the crystallization kinetics of the Ti40Zr25Ni 8Cu9Be18 amorphous alloy by two different methods, it was found that the crystallization kinetics did not obey the Johnson- Mehl-Avrami equation. A modified method in consideration of the impingement effect was proposed to perform kinetic analysis of the isochronal crystallization of this alloy. The kinetic parameters were then obtained by the linear fitting method based on the modified kinetic equation. The results show that the isochronal crystallization kinetics of the amorphous Ti 40Zr25Ni8Cu9Be18 alloy is heating rate dependent, and the discrepancy between the Johnson-Mehl-Avrami method and the modified method increases with the increase of heating rate.

AB - The primary crystallization of the Ti40Zr25Ni 8Cu9Be18 amorphous alloy was studied by sochronal differential scanning calorimetry (DSC). The activation energy was determined by the Kissinger-Akahira-Sunose method. Trying to analyze the crystallization kinetics of the Ti40Zr25Ni 8Cu9Be18 amorphous alloy by two different methods, it was found that the crystallization kinetics did not obey the Johnson- Mehl-Avrami equation. A modified method in consideration of the impingement effect was proposed to perform kinetic analysis of the isochronal crystallization of this alloy. The kinetic parameters were then obtained by the linear fitting method based on the modified kinetic equation. The results show that the isochronal crystallization kinetics of the amorphous Ti 40Zr25Ni8Cu9Be18 alloy is heating rate dependent, and the discrepancy between the Johnson-Mehl-Avrami method and the modified method increases with the increase of heating rate.

KW - Amorphous alloys

KW - Crystallization

KW - Impingement

KW - Johnson-Mehl-Avrami equation

KW - Kinetics

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U2 - 10.1007/s12613-010-0309-5

DO - 10.1007/s12613-010-0309-5

M3 - 文章

AN - SCOPUS:77955615947

SN - 1674-4799

VL - 17

SP - 307

EP - 311

JO - International Journal of Minerals, Metallurgy and Materials

JF - International Journal of Minerals, Metallurgy and Materials

IS - 3

ER -

Limitation of the Johnson-Mehl-Avrami equation for the kinetic analysis of crystallization in a Ti-based amorphous alloy

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Keywords

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