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

Autor: Leonardo Sant’Ana Gallo, Fabrice Célarié, Jefferson Bettini, Ana Candida M. Rodrigues, Tanguy Rouxel, Edgar D. Zanotto
Přispěvatelé: Universidade Federal de Lavras = Federal University of Lavras (UFLA), Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Centro Nacional de Pesquisa em Energia e Materiais = Brazilian Center for Research in Energy and Materials (CNPEM), Federal University of São Carlos (UFSCar), Sao Paulo State Research Foundation-FAPESP Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2014/03004-0, 2013/07793-6], Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Brasil Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [001]
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Ceramics International
Ceramics International, 2022, 48 (7), pp.9906-9917. ⟨10.1016/j.ceramint.2021.12.195⟩
ISSN: 0272-8842
Popis: International audience; 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.
Databáze: OpenAIRE
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