Thermal residual stresses and their toughening effect in Al2O3 platelet reinforced glass

RI Todd, AR Boccaccini, R Sinclair, RB Yallee, RJ Young

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

Fluorescence spectroscopy has been used to measure the thermal residual stresses in Al2O3-platelet/borosilicate glass composites. Tensile residual stresses were found in the platelets, implying the presence of compressive residual stresses in the glass matrix. Measurements of stresses in the bulk of the composite could be obtained using fluorescence from platelets below the specimen surface. The measured stresses lay between the predictions of models for spherical particles and thin platelets, but were closer to the former for the range of platelet contents investigated (5-30 vol.%). Estimates of the increase in toughness associated with the compressive residual stresses in the matrix suggest that this mechanism makes a significant contribution to the toughening effect of the Al2O3 platelets. (C) 1999 Acta Metallurgica Inc. Published by Elsevier Science Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)3233-3240
Number of pages8
JournalActa Materialia
Volume47
Issue number11
DOIs
Publication statusPublished - 8 Sept 1999
Externally publishedYes

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