Field strength effect on structure, hardness, and crack resistance in single modifier aluminoborosilicate glasses

Aubrey L. Fry, Christy George, Ian Slagle, Harry Hawbaker, Steve Feller, Seong H. Kim, John C. Mauro

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Although the interactions among glass formers and modifiers, for example, connectivity and charge distribution, have been studied extensively in oxide glasses, the impact of a particular modifier species on the mechanical performance of aluminoborosilicate (ABS) glasses is not well understood. This work compares the indentation properties of six ABS glasses, each of which contains a different network modifier (NWM) with varying field strength (FS). Three alkali and three alkaline earth ABS glasses were designed with low NWM content and [NWM] ≈ [Al2O3], to test the modifier FS effect at low concentrations and to maximize three-coordinated boron. It has been found that both hardness and crack resistance increase with increasing FS in these ABS systems, which is surprising in the context of historical reports. Using 11B, 27Al, and 29Si solid-state nuclear magnetic resonance, this work provides evidence of how charge distributions differ as a function of NWM species, and how this relates to the observed indentation behaviors.

Original languageEnglish (US)
Pages (from-to)951-966
Number of pages16
JournalJournal of the American Ceramic Society
Volume106
Issue number2
DOIs
StatePublished - Feb 2023

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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