Indentation cracking and deformation mechanism of sodium aluminoborosilicate glasses

Kacper Januchta, Pengfei Liu, Søren Ravn Hansen, Theany To, Morten Mattrup Smedskjær*

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Abstrakt

Developing less brittle oxide glasses is a grand challenge in the field of glass science and technology, as it would pave the way toward new glass applications and limit the overall raw material usage and energy consumption. However, in order to achieve this goal, more insight into the correlation between the chemical composition and material properties is required. In this work, we focus on the mechanical properties of quaternary sodium aluminoborosilicate glasses, wherein systematic changes in glass chemistry yield different resistances to indentation crack initiation. We discuss the origin of the composition dependence of indentation cracking based on an evaluation of the deformation mechanism taking place during the indentation event. To this end, we use a simple metric, the extent of indent side length recovery upon annealing, to quantify the extent of reversible volume deformation. Finally, we also compare the compositional trend in crack initiation resistance to that in crack growth resistance (fracture toughness), showing no simple correlation among the two.

OriginalsprogEngelsk
TidsskriftJournal of the American Ceramic Society
Vol/bind103
Udgave nummer3
Sider (fra-til)1656–1665
Antal sider10
ISSN0002-7820
DOI
StatusUdgivet - 1 mar. 2020

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