Nucleating heterogeneities and glass formation

P. I K Onorato, Donald R Uhlmann

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

The kinetic treatment of glass formation is extended by the introduction of continuous cooling (CT) curves to estimate the cooling rates required to form glasses of various materials. The CT curves may be constructed from isothermal time-temperature-transformation curves following the approach originally suggested by Grange and Kiefer. The modified analysis is used to evaluate the effects of nucleating heterogeneities on glass formation. It is found that for the concentrations of such heterogeneities found in most liquids, those characterized by contact angles greater than about 100° have a negligible effect on the cooling rate required to form glasses. Heterogeneities with smaller contact angles, can, however, have a significant effect on glass formation, with the critical cooling rate increasing with decreasing contact angle. The effects on glass formation of changes in the contact angle of nucleating heterogeneities are also compared with the effects of changes in the thermodynamic barrier to nucleation (in the crystal-liquid surface energy).

Original languageEnglish (US)
Pages (from-to)367-378
Number of pages12
JournalJournal of Non-Crystalline Solids
Volume22
Issue number2
DOIs
StatePublished - 1976
Externally publishedYes

Fingerprint

Glass
Contact angle
glass
Cooling
cooling
curves
Liquid Crystals
liquid surfaces
Interfacial energy
Liquid crystals
surface energy
Nucleation
nucleation
Thermodynamics
thermodynamics
Kinetics
kinetics
Liquids
estimates
liquids

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Nucleating heterogeneities and glass formation. / Onorato, P. I K; Uhlmann, Donald R.

In: Journal of Non-Crystalline Solids, Vol. 22, No. 2, 1976, p. 367-378.

Research output: Contribution to journalArticle

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