The fast cooling/heating rate effects in devitrification of glasses. I. Number of nucleated particles

V. A. Shneidman, D. R. Uhlmann

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

We consider nucleation of crystalline phase in a glass-forming melt which is quenched at some arbitrary rate, S, and then reheated at some other (typically smaller) rate, H. In conventional (steady-state) approaches it is assumed that the nucleation rate is a function of temperature only, so that the number of nucleated crystallites is proportional to 1/S+ 1/7H. We demonstrate, however, that in general the nucleation rate depends on the quench/heating rate and that there exists an S- and H-dependent temperature region which effectively does not contribute to nucleation, so that the aforementioned scaling does not hold. An expression for the non-steady-state nucleation rate is derived analytically. In certain cases, the number of nucleated crystallites can be reduced by orders of magnitude compared to the steady-state predictions. The results are tested against numerically exact data obtained from the Turnbull-Fisher nucleation model.

Original languageEnglish (US)
Pages (from-to)1094-1102
Number of pages9
JournalJournal of Chemical Physics
Volume108
Issue number3
DOIs
StatePublished - Jan 15 1998

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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