Pre-Crystallization Criteria and Triple Crystallization Kinetic Parameters of Amorphous–Crystalline Phase Transition of As40S45Se15 Alloy

This framework focuses mainly on a detailed study of the pre-crystallization criteria that characterize the As 40 S 45 Se 15 glassy alloy in various heating rates ranging from 5 to 40 (K/min) by Differential Scanning Calorimetry (DSC). These criteria aim to clarify the relationship of the tendency o...

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Bibliographic Details
Published in:Journal of inorganic and organometallic polymers and materials 2021-12, Vol.31 (12), p.4563-4580
Main Authors: Alzaid, Meshal, Abd-el Salam, Mohamed N., Qasem, Ammar, Shaaban, E. R., Hadia, N. M. A.
Format: Article
Language:English
Subjects:
Amorphous alloys
Chemistry
Chemistry and Materials Science
Conversion
Criteria
Crystal growth
Crystal structure
Crystallinity
Crystallization
Differential scanning calorimetry
Heating rate
Inorganic Chemistry
Mathematical models
Nucleation
Organic Chemistry
Parameters
Phase transitions
Polymer Sciences
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Summary:This framework focuses mainly on a detailed study of the pre-crystallization criteria that characterize the As 40 S 45 Se 15 glassy alloy in various heating rates ranging from 5 to 40 (K/min) by Differential Scanning Calorimetry (DSC). These criteria aim to clarify the relationship of the tendency of glass-forming by the heating rate for the investigated glassy alloy. The crystallization parameters were calculated using different methods.The activation energy of crystallization E c ( χ ) as a function of conversion ( χ ) was obtained using the iso-conversional models of Flynn–Wall–Ozawa (FWO), Starink and Kissinger–Akahira–Sunose (KAS). The results show a slight increase of E c ( χ ) with conversion ( χ ) which accounts for a single-step mechanism controlling the crystallization process. Moreever, the conversion dependence of the Avrami exponent n ( χ ) show an increase with conversion ( χ ), average values of n ( χ ) can be accounted for two and three-dimensional crystal growth with heterogeneous nucleation. On the other hand, the fitting of the experimental DSC data to the calculated DSC curves indicated that the crystallization process of the studied glasses cannot be satisfactorily described by the Johnson–Mehl–Avrami (JMA) model. On the contrary (SB) model is more suitable to describe the crystallization process for the studied of As 40 S 45 Se 15 Alloy. Finally, the crystalline structure of the study sample was recognized by X-ray diffraction (XRD) and electron scanning microscope (SEM).
ISSN:1574-1443
1574-1451
DOI:10.1007/s10904-021-02080-4