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Article Dans Une Revue Ceramics International Année : 2022

Fracture toughness and hardness of transparent MgO-Al2O3-SiO2 glass-ceramics

Résumé

Hard and strong transparent glass-ceramics (TGCs) can be used as cooktop plates, telescope mirrors, armor materials, and screens for smartphones and tablets. In this work, transparent glass-ceramics from the MgO-Al2O3-SiO2 (MAS) system were obtained after a refined heat-treatment protocol. The evolution in fracture toughness, KIC (Single Edge Precracked Beam), and Vickers hardness (H-V) were characterized as a function of the crystallization progress. The K-IC of the parent glass was 0.6 MPa m(1/2), whereas the TGC samples present values around 1.1 MPa m(1/2). The average glass hardness was 8.5 and PLUSMN; 0.8 GPa for loads of 0.6-5 N, whereas the H-V of the TGC samples varied from 9 to 10 GPa, for indentation loads ranging from 4.9 to 9.8 N. These results are discussed in light of our previous findings on the evolution of elastic modulus in the same glass-ceramics.
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hal-03629822 , version 1 (08-04-2022)

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Paternité - Pas d'utilisation commerciale

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Leonardo Sant'Ana Gallo, Fabrice Célarié, Jefferson Bettini, Ana Candida M. D. Rodrigues, Tanguy Rouxel, et al.. Fracture toughness and hardness of transparent MgO-Al2O3-SiO2 glass-ceramics. Ceramics International, 2022, 48 (7), pp.9906-9917. ⟨10.1016/j.ceramint.2021.12.195⟩. ⟨hal-03629822⟩
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