Crystallization kinetics of Cu55Hf45 glassy alloy

Flores, O.; Figueroa, I.A.; Lara, Gabriel; González, Gonzalo; Borja-Soto, C.; Verduzco, J.A.

doi:10.1016/j.jnoncrysol.2017.01.021

Cited by 20 publications

(5 citation statements)

References 26 publications

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“…Table S2 and Figure S4 indicate that the activation energy of large particles is lower than that of raw materials. This implies that large particle products crystallize more easily than raw materials [29].…”

Section: Isothermal Crystallization Behaviormentioning

confidence: 99%

Distinct Crystallization Pathways of Polyoxymethylene in Methanol System

Du,

Zhou,

Zhang

et al. 2024

Crystals

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Recrystallization of polyoxymethylene (POM) in solvent is an effective post-treatment method for manufacturing a better POM product. Herein, the crystallization process of POM in methanol was investigated with the use of a series of equipment. The results reveal that POM crystallization in methanol yields two kinds of particle morphologies, including small particles with lamellar structures branching and growing in all directions and large particles resulting from melt agglomeration. The mechanism of POM crystallization in methanol with two distinct pathways was proposed, in which solution cooling crystallization of POM at higher temperature yields small particles while melt crystallization yields large particles. Furthermore, both non-isothermal and isothermal crystallization kinetics of POM were determined. The Avrami equation was employed to derive the crystallization rate constant via data fitting. The activation energy of crystallization was then obtained using the Arrhenius formula. The kinetics suggest that recrystallization of POM in methanol may dissolve and remove substances hindering raw material crystallization, achieving a faster crystallization rate for products.

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Section: Isothermal Crystallization Behaviormentioning

confidence: 99%

Distinct Crystallization Pathways of Polyoxymethylene in Methanol System

Du,

Zhou,

Zhang

et al. 2024

Crystals

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“…The crystallization kinetics study can provide important information on the nucleation and growth behavior associated with nanocrystallization in amorphous alloys, thereby providing a theoretical basis to improve their soft magnetic properties. Crystallization kinetics of amorphous alloys can be investigated by either non-isothermal or isothermal crystallization experiments by combining differential scanning calorimetry (DSC), X-ray diffraction (XRD), and transmission scanning microscopy (TEM) analysis techniques . For non-isothermal crystallization experiments, the crystallization temperature ( T x ) and activation energy ( E a ) for individual phase transformation can be easily identified, while for isothermal crystallization experiments, the local activation energy E (α), crystallization incubation time (τ), Avrami exponent ( n ), and two mechanisms of growth (diffusion-controlled growth and interface-controlled growth) by the well-known KJMA model can be easily determined to aid understanding of the nucleation and growth mechanism in various crystallization stages. − …”

Section: Introductionmentioning

confidence: 99%

“…Crystallization kinetics of amorphous alloys can be investigated by either non-isothermal or isothermal crystallization experiments by combining differential scanning calorimetry (DSC), Xray diffraction (XRD), and transmission scanning microscopy (TEM) analysis techniques. 15 known KJMA model can be easily determined to aid understanding of the nucleation and growth mechanism in various crystallization stages. 16−19 In our previous study, 20 we prepared amorphous alloys with Nb content of 1%, 3%, 5%, and 7%.…”

Section: Introductionmentioning

confidence: 99%

The Non-Isothermal and Isothermal Crystallization Behavior and Mechanism of Fe–Ni Alloys

Chen

Zhu

Zhang

et al. 2020

Crystal Growth & Design

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(Fe40Ni40B19Cu1)97Nb3 magnetic amorphous alloys have been prepared by a melt-spun method, and their crystallization behavior and kinetics have been investigated. The results showed that under non-isothermal conditions, the growth process is easier than the nucleation process for both precipitated phases ((Fe,Ni)23B6 and γ(Fe,Ni)), and the activation energy (E a 2 = 427.03 kJ mol–1) for γ(Fe,Ni) phase is higher than that of (E a 1 = 275.11 kJ mol–1) for the (Fe,Ni)23B6 phase. Under isothermal conditions, the energy released during the entire crystallization process is independent of annealing temperature, and the crystallization parameters fit with the Kolmogorov–Johnson–Mehl–Avrami (KJMA) model well. The nucleation activation energy (E n ) and growth activation energy (E g ) are 429.2 and 417.2 kJ/mol, respectively. Based on the values of the Avrami exponent n, the transformation process can be divided into three different stages: Stage I, n ≈ 2.5; Stage II, 2.5 ≤ n ≤ 3; Stage III, n > 3. The whole crystallization process from interface-controlled one-dimensional growth converted into interface-controlled three-dimensional growth.

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“…Although crystallization kinetics in Cu‐based ternary and quaternary metallic glasses have been studied by many workers, crystallization kinetics in Cu‐based binary metallic glasses have few investigations. Crystallization kinetics of Cu 55 Hf 45 and Cu 50 Zr 50 glassy alloy was studied . Meanwhile, influence of minor additions of Si on the crystallization kinetics of Cu 55 Hf 45 metallic glasses was reported .…”

Section: Introductionmentioning

confidence: 99%

“…Crystallization kinetics of Cu 55 Hf 45 and Cu 50 Zr 50 glassy alloy was studied. 13,14 Meanwhile, influence of minor additions of Si on the crystallization kinetics of Cu 55 Hf 45 metallic glasses was reported. 15 In this paper, the isothermal crystallization of Cu 55 Zr 45 binary glassy alloy will be investigated to further understand the crystallization process of binary glassy alloy.…”

Section: Introductionmentioning

confidence: 99%

Kinetics analysis of the isothermal crystallization of Cu₅₅Zr₄₅ metallic glass by differential scanning calorimetry

Gao

Jian

2019

Int J of Chemical Kinetics

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The crystallization kinetics of Cu55Zr45 (at%) glassy alloy is studied under isothermal condition using differential scanning calorimetry (DSC). The plot of correlation between the crystallized volume fraction α and annealing time t shows a sigmoid‐type curve, which is steeper with higher annealing temperature. Furthermore, in isothermal crystallization condition, local activation energy Eα values, determined using the Arrhenius equation, range from 181.1 to 187.8 kJ/mol, which is nearly a constant. The local Avrami exponent n(α) values, obtained by the Johnson‐Mehl‐Avrami equation, which range from 2.2 to 4.0 at different annealing temeperatures, which indicates that the crystallization mechanism is diffusion‐controlled transformation. Moreover, n(α) becomes greater with increasing annealing temperature, which indicates that annealing temperature can affect nucleation rate and growth type.

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Crystallization kinetics of Cu55Hf45 glassy alloy

Cited by 20 publications

References 26 publications

Distinct Crystallization Pathways of Polyoxymethylene in Methanol System

Distinct Crystallization Pathways of Polyoxymethylene in Methanol System

The Non-Isothermal and Isothermal Crystallization Behavior and Mechanism of Fe–Ni Alloys

Kinetics analysis of the isothermal crystallization of Cu₅₅Zr₄₅ metallic glass by differential scanning calorimetry

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Crystallization kinetics of Cu55Hf45 glassy alloy

Cited by 20 publications

References 26 publications

Distinct Crystallization Pathways of Polyoxymethylene in Methanol System

Distinct Crystallization Pathways of Polyoxymethylene in Methanol System

The Non-Isothermal and Isothermal Crystallization Behavior and Mechanism of Fe–Ni Alloys

Kinetics analysis of the isothermal crystallization of Cu55Zr45 metallic glass by differential scanning calorimetry

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Product

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Kinetics analysis of the isothermal crystallization of Cu₅₅Zr₄₅ metallic glass by differential scanning calorimetry