Non-randomness in network glasses and rigidity

Michael Thorpe, M. V. Chubynsky, D. J. Jacobs, J. C. Phillips

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The continuous random network model is widely used as a realistic description of the structure of covalent glasses and amorphous solids. We point out that, in real glasses and amorphous materials, there are nonrandom structural elements that go beyond just simple chemical ordering. We propose that the network can self-organize at its formation or fictive temperature and examine some of the possible consequences of such self-organization. We find that the absence of small rings can cause the mechanical threshold to change from a second-order to a first-order transition. We show that, if stressed regions are inhibited in the network, then there are two phase transitions and an intermediate phase that is rigid but stress-free. This intermediate phase is bounded by a second-order transition, on the one hand, and a first-order transition, on the other. Recent experiments in chalcogenide glasses give evidence for this intermediate phase.

Original languageEnglish (US)
Pages (from-to)160-166
Number of pages7
JournalGlass Physics and Chemistry
Volume27
Issue number2
DOIs
StatePublished - Mar 2001
Externally publishedYes

Fingerprint

rigidity
Rigidity
Glass
glass
Chemical elements
amorphous materials
Phase transitions
thresholds
causes
rings
Experiments
Temperature
temperature

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Thorpe, M., Chubynsky, M. V., Jacobs, D. J., & Phillips, J. C. (2001). Non-randomness in network glasses and rigidity. Glass Physics and Chemistry, 27(2), 160-166. https://doi.org/10.1023/A:1011336511583

Non-randomness in network glasses and rigidity. / Thorpe, Michael; Chubynsky, M. V.; Jacobs, D. J.; Phillips, J. C.

In: Glass Physics and Chemistry, Vol. 27, No. 2, 03.2001, p. 160-166.

Research output: Contribution to journalArticle

Thorpe, M, Chubynsky, MV, Jacobs, DJ & Phillips, JC 2001, 'Non-randomness in network glasses and rigidity', Glass Physics and Chemistry, vol. 27, no. 2, pp. 160-166. https://doi.org/10.1023/A:1011336511583
Thorpe M, Chubynsky MV, Jacobs DJ, Phillips JC. Non-randomness in network glasses and rigidity. Glass Physics and Chemistry. 2001 Mar;27(2):160-166. https://doi.org/10.1023/A:1011336511583
Thorpe, Michael ; Chubynsky, M. V. ; Jacobs, D. J. ; Phillips, J. C. / Non-randomness in network glasses and rigidity. In: Glass Physics and Chemistry. 2001 ; Vol. 27, No. 2. pp. 160-166.
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