Updated definition of glass-ceramics

Deubener, Joachim; Allix, Mathieu; Davis, Mark J.; Durán, A.; Höche, Thomas; Honma, Tsuyoshi; Komatsu, Takayuki; Krüger, S.; Mitra, Ina; Müller, Ralf; Nakane, Shingo; Pascual, María J.; Schmelzer, Jürn W. P.; Zanotto, Edgar Dutra; Zhou, Shifeng

doi:10.1016/j.jnoncrysol.2018.01.033

Cited by 307 publications

(158 citation statements)

References 48 publications

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“…Glass‐ceramics, obtained by controlled crystallization of glasses, have attracted a great attention over the past 60 years . Many studies on the fracture toughness of glass‐ceramics have been reported.…”

Section: Introductionmentioning

confidence: 99%

3D microstructure and crack pathways of toughened CaO–Al₂O₃–SiO₂ glass by precipitation of hexagonal CaAl₂Si₂O₈ crystal

Maeda¹,

Iwasaki

Urata³

et al. 2019

J Am Ceram Soc

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We investigated CaO–Al2O3–SiO2 glass partially crystallized with molybdenum particles as nucleating agents. Microstructure of the material was characterized as a house‐of‐cards structure composed of plate‐like crystals. Microcracks propagated along the crystal plane parallel to the double layer of SiO4/AlO4 tetrahedrons separated by layers of calcium atoms. To investigate the fracture behavior of the hexagonal CaAl2Si2O8 crystals, molecular dynamics simulations were performed, which demonstrated that a crack can be easily triggered by shear deformation along the calcium layer. Additionally, once a crack was generated in the calcium layer, it propagated rapidly, whereas the crack perpendicular to the calcium layer hardly propagated. This simulated behavior is consistent with the experimentally observed cleavage behavior of the hexagonal CaAl2Si2O8 crystal. The experimental and simulation results effectively explained the non‐elastic fracture behavior of the material.

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Section: Introductionmentioning

confidence: 99%

3D microstructure and crack pathways of toughened CaO–Al₂O₃–SiO₂ glass by precipitation of hexagonal CaAl₂Si₂O₈ crystal

Maeda¹,

Iwasaki

Urata³

et al. 2019

J Am Ceram Soc

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“…The recently revised definition of glass‐ceramics states that the glass‐ceramics are inorganic, nonmetallic materials prepared by controlled crystallization of glasses via different processing methods. They contain at least one type of functional crystalline phase and a residual glass . The transformation from glass to glass‐ceramics takes place by a controlled process of nucleation and crystals growth giving rise to the evolved nano‐ and microstructures .…”

Section: Introductionmentioning

confidence: 99%

Effect of controlled crystallization on polaronic transport in phosphate‐based glass‐ceramics

Pavić

Nikolić

Graça

et al. 2019

Int J of Appl Glass Sci

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The effect of induced crystallization on changes in electrical transport of two types of glass‐ceramics, pure polaron conductive 40Fe2O3‐60P2O5 (F40) (mol%) and predominantly polaronic 5Li2O‐5ZnO‐40P2O5‐50WO3 (Li‐50W) (mol%) was investigated. F40 glass‐ceramics produced at low heat‐treatment temperatures contain single‐phase Fe3(P2O7)2 whereas at higher temperatures two more phases Fe4(P2O7)3 and Fe(PO3)3 are formed. Structural modifications strongly depend on the crystallization temperature and time. The appearance of crystalline phases studied by Mössbauer spectroscopy exhibits changes in Fe2+/Fetot ratio in crystalline/glassy phases. The detailed analysis of different iron sites allows their correlation with changes in electrical conductivity as crystallization progresses. Depending on the course of crystallization, the contribution of each phase to the overall conductivity is determined by the frequency dependence of Zʺ(ω) and Mʺ(ω). DC conductivity shows a sharp decrease as Fe3(P2O7)2 phase appears and consequently glass matrix remains impoverished in Fe2+‐Fe3+ pairs. In the multiphase systems prepared at higher crystallization temperatures, the overall electrical conductivity increases although the continuous grain boundaries along different crystalline grains play a limiting factor. In contrast, the slight conductivity change in Li‐50W glass‐ceramics upon crystallization is a result of remaining W5+‐W6+ pairs in the residual glassy phase. Independence of electrical transport on Li+ ions confirms predominantly polaronic transport in Li‐50W glass‐ceramics.

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“…Glass‐ceramics are inorganic, non‐metallic materials that consist of a residual glassy phase and one or more embedded crystalline phases produced by controlled crystallization via different processing methods . The superior mechanical properties compared with its precursor parent glass have led to a wide range of industrial applications, such as bioactive implants, dental applications, and low thermal expansion materials .…”

Section: Introductionmentioning

confidence: 99%

Toughening of Li₂O‐2SiO₂ glass‐ceramics induced by intriguing deformation behavior of lithium disilicate nanocrystal

et al. 2019

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We report a toughening mechanism of Li2O‐2SiO2 glass‐ceramics induced by intriguing anisotropic deformation behavior of lithium disilicate nanocrystal under tensile loadings using molecular dynamics simulations. The nanocrystal undergoes clear brittle cleavage when loaded in the [010] direction, while exhibiting a first‐order deformation‐induced transition when loaded in the [100] direction. The transition is exclusively facilitated by local Li–O bond breaking, which spreads to the whole sample under continuous loading. This hierarchical deformation mechanism (exclusive Li–O bond breakage prior to any Si–O bond breakage) enables lithium disilicate nanocrystal bearing large amounts of deformation without breaking. We further demonstrate that the toughness of Li2O‐2SiO2 glass‐ceramics can be significantly enhanced by deliberate designs of nanocrystal distributions in glass. The direct observation of this intriguing deformation behavior might inspire new ideas to design tougher lithium disilicate glass‐ceramics.

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Updated definition of glass-ceramics

Cited by 307 publications

References 48 publications

3D microstructure and crack pathways of toughened CaO–Al₂O₃–SiO₂ glass by precipitation of hexagonal CaAl₂Si₂O₈ crystal

3D microstructure and crack pathways of toughened CaO–Al₂O₃–SiO₂ glass by precipitation of hexagonal CaAl₂Si₂O₈ crystal

Effect of controlled crystallization on polaronic transport in phosphate‐based glass‐ceramics

Toughening of Li₂O‐2SiO₂ glass‐ceramics induced by intriguing deformation behavior of lithium disilicate nanocrystal

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Updated definition of glass-ceramics

Cited by 307 publications

References 48 publications

3D microstructure and crack pathways of toughened CaO–Al2O3–SiO2 glass by precipitation of hexagonal CaAl2Si2O8 crystal

3D microstructure and crack pathways of toughened CaO–Al2O3–SiO2 glass by precipitation of hexagonal CaAl2Si2O8 crystal

Effect of controlled crystallization on polaronic transport in phosphate‐based glass‐ceramics

Toughening of Li2O‐2SiO2 glass‐ceramics induced by intriguing deformation behavior of lithium disilicate nanocrystal

Contact Info

Product

Resources

About

3D microstructure and crack pathways of toughened CaO–Al₂O₃–SiO₂ glass by precipitation of hexagonal CaAl₂Si₂O₈ crystal

3D microstructure and crack pathways of toughened CaO–Al₂O₃–SiO₂ glass by precipitation of hexagonal CaAl₂Si₂O₈ crystal

Toughening of Li₂O‐2SiO₂ glass‐ceramics induced by intriguing deformation behavior of lithium disilicate nanocrystal