Atomic Force Microscopy and X‐ray Photoelectron Spectroscopy Investigation of the Onset of Reactions on Alkali Silicate Glass Surfaces

Gregory I. Rudd, Stephen H. Garofalini, David A. Hensley, C. Mathew Mate

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Atomic force microscopy was used to measure forces acting on a sharp tungsten tip as it was brought into contact with silica and 30 mol% binary alkali silicate glasses. Experiments were performed in controlled atmospheres and under vacuum. Attractive forces and liquid‐layer thicknesses were found to vary markedly between the glasses, and heterogeneity was observed on the binary alkali silicates analyzed in vacuo. Air or wet carbon dioxide exposure resulted in the penetration of the tip into a soft surface layer on the alkali silicates. In addition, liquid layer formation on the alkali silicates was found to be promoted by exposure to water vapor in the order lithium < sodium < potassium. X‐ray photoelectron spectroscopy indicated that reaction between the potassium silicate surface and water vapor occurred on exposure to only 10−4 torr (1 torr = 1.33 × 102 Pa) water. Surface segregation and leaching of potassium occurred under the same conditions.

Original languageEnglish
Pages (from-to)2555-2560
Number of pages6
JournalJournal of the American Ceramic Society
Volume76
Issue number10
DOIs
Publication statusPublished - Oct 1993

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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