Journal
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 131, Issue 3, Pages 2491-2501Publisher
SPRINGER
DOI: 10.1007/s10973-017-6797-z
Keywords
Glassy alloys; Calorimetric studies; Thermal stability; Coordination number; Rate of crystallization
Funding
- Board of Research in Nuclear Sciences (BRNS), Mumbai, India [2011/20/37P/02/BRNS]
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Calorimetric measurements have been performed in quaternary glassy system Se78-xTe20Sn2Cdx (x = 0, 2, 4, and 6) to study the thermally induced glass transition and crystallization phenomena. The characteristics kinetic temperatures (glass transition temperature , onset crystallization temperature , peak crystallization temperature ) and static melting temperature of the quaternary glassy series have been determined using their non-isothermal DSC curves. These temperatures were utilized to calculate the thermal stability and the Hruby parameter for the studied glasses. Both the activation energy of glass transition and the activation energy of crystallization for all compositions were evaluated using the well-known Kissinger's relation and the method of Augis-Bennett. Values of the fragility index and the crystallization rate factor were estimated using the activation energy values and , respectively. The compositional dependence of the above-mentioned parameters was discussed on the basis of rigidity models and according to the formation of iono-covalent bonds when our glassy Se-Te-Sn system is doped with a heavy element as Cd.
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