Floppy to rigid transition and chemical ordering in Ge-Sb(As)-Se glasses

Mahadevan, Sudha and Giridar, A (1992) Floppy to rigid transition and chemical ordering in Ge-Sb(As)-Se glasses. Journal of Non-Crystalline Solids, 143 (1). pp. 52-58.

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Abstract

The dependence of mean atomic volume and the glass transition temperature on the average coordination number, lt;igt;Zlt;/igt;, have been examined for glasses of the Ge-Sb(As)-Se systems, in the light of recent models proposed for network glasses. The results indicate the occurrence of additional features at lt;igt;Zlt;/igt; values other than the topological thresholds of amp;sime;2.40 and amp;sime;2.67. These additional features are attributed to effects of chemical ordering. The occurrence of these features in addition to those due to the two topological effects, namely, the floppy to rigid transition and the structural transition, leads to the conclusion that the effects of the chemical ordering and the effects which have topological origin coexist in these glasses

Item Type: Journal Article
Uncontrolled Keywords: Structural transition;Topological effects
Subjects: AERONAUTICS > Aerodynamics
Division/Department: Materials Science Division, Materials Science Division
Depositing User: M/S ICAST NAL
Date Deposited: 28 Mar 2007
Last Modified: 24 May 2010 09:55
URI: http://nal-ir.nal.res.in/id/eprint/4110

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