Viscous Sintering of a Bimodal Pore‐Size Distribution

George Scherer

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106 Scopus citations

Abstract

The cylinder model, used previously to analyze the viscous sintering of flame hydrolysis preforms and gels, is shown to be consistent with other models of early‐ and late‐stage sintering. The model is then applied to a bimodal pore‐size distribution in which the different shrinkage rates of small and large pores produce local stresses. The effect of these stresses on the sintering rate is determined and shown to be substantial. Initially, the small pores accelerate the densification of the large pores; later, shrinkage of the isolated large pores is resisted by the sintered remains of the small pores. Consequently, the time to reach full density is nearly independent of the initial volume fraction of small pores.

Original languageEnglish (US)
Pages (from-to)709-715
Number of pages7
JournalJournal of the American Ceramic Society
Volume67
Issue number11
DOIs
StatePublished - Jan 1 1984

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

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