Rigidity and intermediate phases in glasses driven by speciation

Abstract

The rigid to floppy transitions and the associated intermediate phase in glasses are studied in the case where the local structure is not fully determined from the macroscopic concentration. The approach uses size increasing cluster approximations and constraint counting algorithms. It is shown that the location and the width of the intermediate phase and the corresponding structural, mechanical and energetical properties of the network depend crucially on the way local structures are selected at a given concentration. The broadening of the intermediate phase is obtained for networks combining a large amount of flexible local structural units and a high rate of medium range order.

4 pages, 4 figures

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Cited by in corpus (6)

• Melt homogenization and self-organization of chalcogenides glasses: evidence of sharp rigidity, stress and nanoscale phase separation transitions in the GexSe100-x binary
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• Abrupt boundaries of intermediate phases and space filling in oxide glasses
• Fast-ion conduction and flexibility and rigidity of solid electrolyte glasses
• Crucial effect of glass processing and melt homogenization on the fragility of non-stoichiometric chalcogenides
• Statistical Mechanics of Topological Fluctuations in Glass-Forming Liquids