Crystallization Kinetics of Misch Metal Based Bulk Metallic Glasses

Wu, Xiaofeng; Meng, Li-Kai; Zhao, Wei; Suo, Z.Y.; Si, Yi; Qiu, Keqiang

doi:10.1016/s1002-0721(07)60071-4

Cited by 14 publications

(5 citation statements)

References 14 publications

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“…The starting point is always the evolution of crystallized fraction in relation to time. JohnsonMehl-Avrami (JMA) is usually used to describe the isothermal crystallization kinetics [36][37][38][39]. This model is also used for any kind of phase transformation, for instance for precipitation in a solid solution.…”

Section: Introductionmentioning

confidence: 99%

Crystallization kinetics in Cu46Zr45Al7Y2 bulk metallic glass by differential scanning calorimetry (DSC)

Qiao

Pelletier

2011

Journal of Non-Crystalline Solids

107

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Section: Introductionmentioning

confidence: 99%

Crystallization kinetics in Cu46Zr45Al7Y2 bulk metallic glass by differential scanning calorimetry (DSC)

Qiao

Pelletier

2011

Journal of Non-Crystalline Solids

107

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“…It is noted that the temperature shifts of 3±2 K exist even at the same heating rate between different DSC. The Kissinger [26], Ozawa [13,14,17,27], Augis-Bennett [14], Lasocka [28] and non-linear Vogel-Fulcher-Tammann (VFT) equations [29] were used to illustrate the dependence of the crystallization peak temperatures on the heating rates. Among them, the Kissinger equation is usually used to estimate the apparent activation energy of the crystallization [26].…”

Section: Resultsmentioning

confidence: 99%

“…The stability is an important factor related to crystallization, activated process of transition from disordered amorphous structure to ordered crystal structure. Study of kinetics of crystallization will help to determine the thermal stability of metallic glasses [13].…”

Section: Introductionmentioning

confidence: 99%

Effect of Fe on Crystallization Process of Zr-Co-Al-(Fe) Bulk Metallic Glasses

Tan

Pan

et al. 2013

MSF

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The change in the internal states of Zr56Co28Al16 bulk metallic glass (BMG) upon minor substitution of Co with Fe was investigated for alloys with different compositions of Zr56Co28-xAl16Fex (x = 0, 1 and 2, respectively). Results exhibited that the ductile Zr-Co-Al-Fe BMGs were obtained and showed better glass-forming ability (GFA) via a small amount of Co partial replacement by Fe. In addition, the addition of a small amount of Fe enhanced the crystallization process and reduced the activation energy. The micro-alloying with Fe reduced the heat of mixing, which made the rearrangement of atoms easier during the crystallization process.

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“…The C-JMAK model was originally developed to describe the solid-state phase transformation − ,− and has since been extended to include various chemical reactions, such as hydrogenation and reduction reaction . Researchers have made significant efforts to utilize the C-JMAK model to analyze the hydrogenation kinetics for various Mg-based alloys. , However, gas–solid reactions are typically described by the geometrical contraction model, specifically the shrinking core theory − or the unreacted shrinking core model. , This raises questions about how a nucleation–growth model like the JMAK model can be applied successfully to gas–solid hydrogenation reactions.…”

Section: Introductionmentioning

confidence: 99%

Surface Diffusion-Controlled Jonhson–Mehl–Avrami–Kolmogorov Model for Hydrogenation of Mg-based Alloys

Huang

Zhou

2023

J. Phys. Chem. C

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The use of the Jonhson−Mehl−Avrami−Kolomogorov (JMAK) model has become prevalent in the kinetic analysis for Mg-based hydrogen storage alloys. However, the classical JMAK model has shown inadequate results in certain cases, resulting in poor fitness and/or inexplicably low Avrami exponent n. To address this issue, this paper proposes a new model based on the classic JMAK model. The new model considers the preferential growth of the hydride phase from the surface into the bulk, resulting in a diffusion barrier effect during the hydrogenation of Mg-based hydrogen storage alloys. A new parameter, surface diffusion barrier index b, is introduced to quantify the surface diffusion barrier effect. The governing equation is expressed as lnThe modified JMAK model demonstrates improved fitting performance for the hydrogenation analysis in multiple Mg-based systems. Additionally, the relationship between diffusion barrier index b and the reaction rate is discussed. The results suggest that the faster initial reaction rate leads to a stronger diffusion barrier, which inhibits the subsequent hydrogenation for the alloy.

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Crystallization Kinetics of Misch Metal Based Bulk Metallic Glasses

Cited by 14 publications

References 14 publications

Crystallization kinetics in Cu46Zr45Al7Y2 bulk metallic glass by differential scanning calorimetry (DSC)

Crystallization kinetics in Cu46Zr45Al7Y2 bulk metallic glass by differential scanning calorimetry (DSC)

Effect of Fe on Crystallization Process of Zr-Co-Al-(Fe) Bulk Metallic Glasses

Surface Diffusion-Controlled Jonhson–Mehl–Avrami–Kolmogorov Model for Hydrogenation of Mg-based Alloys

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