Glass Forming Ability Criterion

Saad, Mohammed; Poulain, Marcel

doi:10.4028/www.scientific.net/msf.19-20.11

Cited by 461 publications

(146 citation statements)

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“…The higher values of H r parameter mean a delay in the nucleation process. One more parameter useful for analyzing thermal stability is weighted thermal stability H w = (T c −T g )/T g introduced by Saad and Poulain [17]. Obtained values of thermal stability analyzed through three mentioned criteria at four heating rates are given in Table III.…”

Section: Glass Transition Activation Energymentioning

confidence: 99%

Kinetic Analysis of Thermal Processes in Ag-As-S-Se System Based on DSC Measurements

et al. 2016

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Thermal properties of glasses from the system Agx(As40S30Se30)100−x for x = 0, 0.5, 1, 3, and 5 at.% were investigated by differential scanning calorimetry. The DSC curves were obtained under non-isothermal conditions which allowed determination of the glass transition temperature Tg (onset temperature), crystallization temperature Tp (corresponding to the crystallization peak maximum), melting temperature Tm, crystallization enthalpy Hc, and melting enthalpy Hm. The DSC curves obtained at the same heating rate were analyzed in order to study the variation of glass transition temperature with Ag concentration. Observed Tg shift toward higher values, with increase in the heating rate, is in agreement with the Lasocka equation. Samples with 3 at.% and 5 at.% Ag were further thermally treated at different heating rates with the aim of analyzing kinetic processes of crystallization. The Moynihan and Kissinger models were used to calculate the activation energy of glass transition and activation energy of crystallization. For the samples that showed the crystallization processes an assessment of the thermal stability was done based on different criteria.

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Section: Glass Transition Activation Energymentioning

confidence: 99%

Kinetic Analysis of Thermal Processes in Ag-As-S-Se System Based on DSC Measurements

et al. 2016

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“…3,6,20) The following 12 parameters are used referred from the other papers. [35][36][37][38][39][40][41][42][43] (1) Onset temperature of thermal crystallization (T x ). T x was evaluated by conventional DSC measurements at a heating rate of 0.…”

Section: Electron Irradiation Induced Crystallization Behav-mentioning

confidence: 99%

Phase Stability of an Amorphous Phase Against Electron Irradiation Induced Crystallization in Fe-Based Metallic Glasses

2007

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Electron irradiation induced nano-crystallization of melt-spun amorphous phase in Fe-Zr-B ternary alloys was investigated focusing on the difference in phase stability of amorphous phase during thermal annealing and electron irradiation. Nano-composite structure composed of nanocrystalline -Fe precipitates with b.c.c.-structure, metallic compounds and a residual amorphous matrix was formed under 2.0 MeV electron irradiation at 298 K, while such nano-structure was hardly realized by thermal annealing. The phase stability of an amorphous phase against electron irradiation was discussed based on the relationship between thermal properties and critical onset total dose of electron irradiation induced crystallization at 298 K.

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“…To obtain the GFA and ther− mal stability of a glassy material several quantitative met− hods have been introduced by the investigators [91,92]. Dietzel [91] has introduced the first GFA criterion D T = T c -T g and Hruby [93] developed the important H R GFA crite− rion (H R = T c -T g / T m -T c ).…”

Section: Glass Forming Abilitymentioning

confidence: 99%

Recent advancement in metal containing multicomponent chalcogenide glasses

Singh

2012

Opto-Electronics Review

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Amorphous semiconductors or chalcogenide glasses are the key materials in modern optoelectronics to make comfortable life of our society. Understanding of physical properties (like microstructure, thermal, optical, electrical) of these materials is important for their different uses. Predominant study of physical properties of the metal containing multicomponent chalcogenide glasses have attracted much attention, due to their interesting variable features and wide range of structural network modifications. Structural modifications in these materials are usually described with respect to the values of structural units (or average coordination number). In significance to this, the present work demonstrates the chronological development in the field of chalcogenide glasses along with scanning electron microscopy (SEM) morphologies. Optical, electrical and thermal correlative properties of recent developed Se93−xZn2Te5Inx (0 ≤ x ≤ 10) metallic multicomponent chalcogenide glasses are discussed. Variation in SEM morphology, refractive index (n), extinction coefficient (K), optical energy band gap (Eg), electrical conductivity (σav), crystallization activation energy (Ec) and glass forming ability (GFA) with structural units of Se-Zn-Te-In glasses have been demonstrated in this study. Subjected materials thermal, optical and electrical parameters have been achieved higher and lower in a respective manner at the threshold structural unit value 〈r〉.

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Glass Forming Ability Criterion

Cited by 461 publications

References 0 publications

Kinetic Analysis of Thermal Processes in Ag-As-S-Se System Based on DSC Measurements

Kinetic Analysis of Thermal Processes in Ag-As-S-Se System Based on DSC Measurements

Phase Stability of an Amorphous Phase Against Electron Irradiation Induced Crystallization in Fe-Based Metallic Glasses

Recent advancement in metal containing multicomponent chalcogenide glasses

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