Non-isothermal crystallization in Ga–Se–Ag chalcogenide glass by differential scanning calorimetry

Khan, Shamshad A.; Lal, J K; Al-Agel, F.A.; Alvi, M. A.

doi:10.1016/j.jallcom.2012.11.171

Cited by 17 publications

(5 citation statements)

References 42 publications

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“…The shift of T p(1,2) toward the higher temperature with increasing heating rates can be ascribed to the fact that, with the heating rate grows, the coating systems have no sufficient time for nucleation and crystallization. Similar result was also demonstrated in other literature …”

Section: Resultssupporting

confidence: 93%

“…Similar result was also demonstrated in other literature. 11 3.3 | Heating rate dependence of nucleation and grain growth Figure 6 plots the evolution of characteristic temperatures (T g , T c1 , T p1 , T c2 , T p2 ) with ln (b) for the as-sprayed Al 2 O 3 -YAG amorphous coating, which can be matched well with the empirical relationship developed by Losocka as represented by the following expression:…”

Section: Dsc Curve Analysismentioning

confidence: 55%

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Non‐isothermal crystallization kinetics of Al₂O₃‐YAG amorphous ceramic coating deposited via plasma spraying

et al. 2018

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Crystallization kinetics of the newly developed Al2O3‐Y3Al5O12 (YAG) amorphous ceramic coating fabricated by atmospheric plasma spraying (APS) were investigated via differential scanning calorimetry (DSC) under non‐isothermal conditions. The phase compositions and microstructure of the as‐sprayed coating were characterized by X‐ray diffraction (XRD) and Scanning electron microscopy (SEM). The glass transition temperature Tg, the onset temperature of crystallization Tc and the peak temperature of crystallization Tp presented heating rate dependence. The related kinetic parameters of activation energies (Eg, Ec, Ep) and Avrami exponents (n) were quantified using various methods including Kissinger, Augis–Bennett, Ozawa and Matusita–Sakka, etc., to understand the phase transition mechanism and crystallization process in depth. A series of parameters including devitrification interval ΔT, thermal stability (Tc, Ec), nucleation resistance Ec/RTg and fragility index F were quantified in order to evaluate the nucleation mechanism, crystallization behavior and thermal stability of Al2O3‐YAG amorphous ceramic coating. Excellent thermal stability was witnessed in the studied coating. Furthermore, the YAG crystalline phases can be reasonably controlled and independently precipitated from the amorphous matrix via proper annealing.

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Section: Resultssupporting

confidence: 93%

Section: Dsc Curve Analysismentioning

confidence: 55%

Non‐isothermal crystallization kinetics of Al₂O₃‐YAG amorphous ceramic coating deposited via plasma spraying

et al. 2018

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“…Equation (11) indicates that T g increases with increasing b. The shift of T p towards the higher temperature with increasing b may be owed to the fact that, when b increases, the system does not attain enough time for nucleation and crystallization [41].…”

Section: Thermal Analysismentioning

confidence: 99%

Modeling of thermal studies on melt quenched Ge₁₈Bi₄Se₇₈ chalcogenide

Hakeem¹,

El-Raheem²,

Wakkad³

et al. 2021

Phys. Scr.

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The crystallization characteristics for Ge18Bi4Se78 glass are studied in this work by means of differential thermal analysis (DTA) under non-isothermal conditions. One stage endothermic glass transition and one exothermic crystallization are observed in the DTA curves. The results of topological constraints for Ge18Bi4Se78 glass show that the calculated value of glass transition temperature (Tg) is very close to that of the experimental results. The as-prepared, as well as the annealed samples, are examined using x-ray diffraction (XRD), energy dispersive x-ray spectroscopy (EDX), scan electron microscope (SEM) techniques. Avrami’s exponent (n) found to have an average value of 1.61 ± 0.2 reveals a mixture of one dimensional and surface nucleation stages of growth. Many models are used to estimate the activation energies for glass transition (Eg) and crystallization (Ec). The crystallization process was found to be described by the Sestak- Berggren SB(M, N) model.

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“…Understanding of crystallization kinetics is essential to find the utility of a material for a specific application. For the study of crystallization kinetics Differential Scanning Calorimetery has been widely used . Activation energy of crystallization has been evaluated using Kissinger, Ozawa, Augis‐Bennet and Matusita − Sakka models.…”

Section: Introductionmentioning

confidence: 99%

Study of Activation Energy of Crystallization and Growth Morphology of Ge_25−xSe₇₅Sb_x(x = 12, 15, 18) Chalcogenide Glasses

Tanwar¹,

Saraswat

2017

Macromolecular Symposia

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In the present paper crystallization kinetics of Ge25‐xSe75Sbx(x = 12, 15, 18) chalcogenide glasses has been investigated using thermal analysis (TA) technique. Ge25‐xSe75Sbx (x = 12, 15, 18) chalcogenide glasses have been prepared by rapid quenching of melt technique. For structure characterization XRD technique has been used. Out of various TA techniques Differential Scanning Calorimetery (DSC) has been used for present study. DSC scans have been carried at different heating rates i.e. 5, 10, 15 and 20 K/min. For evaluation of activation energy of crystallization various theoretical models Kissinger, Ozawa, Augis‐Bennet and Matusita‐Sakka have been used. Activation energy of crystallization increases with increase of Sb content in Ge25‐xSe75Sbx(x = 12, 15, 18) glassy series. The value of Avrami index indicates bulk crystallization with one or two dimensional growth.

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Non-isothermal crystallization in Ga–Se–Ag chalcogenide glass by differential scanning calorimetry

Cited by 17 publications

References 42 publications

Non‐isothermal crystallization kinetics of Al₂O₃‐YAG amorphous ceramic coating deposited via plasma spraying

Non‐isothermal crystallization kinetics of Al₂O₃‐YAG amorphous ceramic coating deposited via plasma spraying

Modeling of thermal studies on melt quenched Ge₁₈Bi₄Se₇₈ chalcogenide

Study of Activation Energy of Crystallization and Growth Morphology of Ge_25−xSe₇₅Sb_x(x = 12, 15, 18) Chalcogenide Glasses

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Non-isothermal crystallization in Ga–Se–Ag chalcogenide glass by differential scanning calorimetry

Cited by 17 publications

References 42 publications

Non‐isothermal crystallization kinetics of Al2O3‐YAG amorphous ceramic coating deposited via plasma spraying

Non‐isothermal crystallization kinetics of Al2O3‐YAG amorphous ceramic coating deposited via plasma spraying

Modeling of thermal studies on melt quenched Ge18Bi4Se78 chalcogenide

Study of Activation Energy of Crystallization and Growth Morphology of Ge25−xSe75Sbx(x = 12, 15, 18) Chalcogenide Glasses

Contact Info

Product

Resources

About

Non‐isothermal crystallization kinetics of Al₂O₃‐YAG amorphous ceramic coating deposited via plasma spraying

Non‐isothermal crystallization kinetics of Al₂O₃‐YAG amorphous ceramic coating deposited via plasma spraying

Modeling of thermal studies on melt quenched Ge₁₈Bi₄Se₇₈ chalcogenide

Study of Activation Energy of Crystallization and Growth Morphology of Ge_25−xSe₇₅Sb_x(x = 12, 15, 18) Chalcogenide Glasses