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Título: | Fracture toughness and hardness of transparent MgO–Al2O3–SiO2 glass-ceramics |
Palavras-chave: | Transparent glass-ceramics Crystallization Elastic modulus Vitrocerâmicas transparentes Cristalização Módulo elástico |
Data do documento: | 1-Abr-2022 |
Editor: | Elsevier |
Citação: | GALLO, L. S. et al. Fracture toughness and hardness of transparent MgO–Al2O3–SiO2 glass-ceramics. Ceramics International, Faenza, v. 48, n. 7, p. 9906-9917, 1 Apr. 2021. DOI: 10.1016/j.ceramint.2021.12.195. |
Resumo: | 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 (HV) were characterized as a function of the crystallization progress. The KIC of the parent glass was 0.6 MPa m1/2, whereas the TGC samples present values around 1.1 MPa m1/2. The average glass hardness was 8.5 ± 0.8 GPa for loads of 0.6–5 N, whereas the HV 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. |
URI: | https://doi.org/10.1016/j.ceramint.2021.12.195 http://repositorio.ufla.br/jspui/handle/1/50737 |
Aparece nas coleções: | DEG - Artigos publicados em periódicos |
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