Strengthening of Glass by Sol‐Gel Coatings

B. D. Fabes, D. R. Uhlmann

Research output: Contribution to journalArticle

60 Scopus citations

Abstract

The affects of alkoxide‐derived coatings on the bending strength of silica glass were investigated. For densified coatings, increases in strength of 120% to 130% were found. A model of the strengthening process, based on the filling‐in and partial healing of surface flaws, is proposed. The model accounts for the temperature dependence of strengthening, the inensitivity of strengthening to the size of oligomers in the coating solution, and the insensitivity of strengthening to the thickness of the coating. The presence of a significant residual tensile stress in sol‐gel‐strengthened material is also indicated.

Original languageEnglish (US)
Pages (from-to)978-988
Number of pages11
JournalJournal of the American Ceramic Society
Volume73
Issue number4
DOIs
StatePublished - Apr 1990

Keywords

  • coatings
  • flaws
  • glass
  • sol‐gel
  • strength

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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