Séminaire

Vendredi 5 Juin 2026 à 11h00.

Crack initiation and crack growth resistance of glasses: from MOF to Oxynitride

Theany To
(Institut de recherche en génie civil et mécanique)

Salle de séminaires Lippmann

Invité(e) par
Christine Martinet

présentera en 1 heure :

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The resistance of glasses to crack initiation and crack growth are both important parameters for evaluating their mechanical performance. Meanwhile, it is paramount important to distinguish them as they refer to different mechanical phenomena. A glass with high crack initiation resistance such as the Asahi one, which does not produce crack when subjected to an indentation load of 30 N, should not be referred to as a “tough glass”. In this seminar, I will answer three important questions – (i) What is the crack growth resistance? (ii) Why are there many different values of the crack growth resistance of the same glass, measuring by different glass scientists/engineers? And (iii) What is the difference between the crack initiation versus crack growth resistance? In order to answer these questions, I will present the experimental data for the two parameters from the metal organic framework (MOF) to oxide glasses, and from oxide to the oxynitride glasses, during my visit at l’ILM – Lyon. 1–3

References :

1. To, T. et al. Fracture toughness of a metal–organic framework glass. Nat. Commun. 11, 1–9 (2020).
2. To, T., Jensen, L. R. & Smedskjaer, M. M. On the relation between fracture toughness and crack resistance in oxide glasses. J. Non-Cryst. Solids 534, 119946 (2020).
3. To, T. et al. Thermal and mechanical properties of Mg–Al–Si–O–N glasses with up to 6.2 at.% nitrogen. J. Am. Ceram. Soc. 108, e20487 (2025).

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