The indentation fracture toughness (kc) and its parameters: The case of silica-rich glasses

S. Dériano, A. Jarry, T. Rouxel, J. C. Sangleboeuf, S. Hampshire

Research output: Contribution to journalConference articlepeer-review

Abstract

The fracture toughness of several glasses, including soda-lime-silica and aluminosilicate glasses, was measured by both the indentation fracture (IF) and the single-edge notched beam (SENB) techniques. The flow densification mechanism occurring during indentation for silica-rich compositions leads to discrepancies between the two methods. The influence of the indentation load and the post-indentation fatigue duration on the indentation on the crack length and on the fracture toughness measurement were investigated. Fatigue curves (V-K) were obtained directly from indentation experiments and fatigue parameters were derived. The sub-critical crack growth resistance was found to be improved by increasing the silica content. In comparison with the studied oxide glasses, a Y-SiAlON oxynitride glass exhibits much greater fatigue resistance. The fatigue phenomenon has a major effect on the estimation of KC from indentation-cracking measurements.

Original languageEnglish
Pages (from-to)44-50
Number of pages7
JournalJournal of Non-Crystalline Solids
Volume344
Issue number1-2
DOIs
Publication statusPublished - 15 Sep 2004
EventFracture and Flow of Advanced Glasses - Trento, Italy
Duration: 8 Sep 200312 Sep 2003

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