Environment dependence of KIc of glass

To, Theany; Célarié, Fabrice; Guéguen, Yves; Brou, N'Goan; Lim, Chhoung; Horm, Rithymarady; Burgaud, Vincent; Fur, Mickaël Le; Chollet, Julien; Orain, Hervé; Rouxel, Tanguy

doi:10.1016/j.jnoncrysol.2021.120873

Cited by 5 publications

(3 citation statements)

References 32 publications

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“…The incorporation of 15 e/o N in an oxide silicate glass typically results to a 10%–15% increase of K Ic . Nevertheless, the actual increase, as measured by means of a self‐consistent method, such as the Single Edge Precracked Beam (SEPB) or the Chevron‐Notch (CN), is usually smaller 195 . A relatively simple approach to predicting the fracture surface energy, γ , in a quantitative manner from the stoichiometric composition consists in assuming a propagating crack extends following a path disrupting the weakest links of the energy landscape and to estimate the surface energy from the bond strength and the bond concentration along this fracture surface 194 .…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Nevertheless, the actual increase, as measured by means of a self-consistent method, such as the Single Edge Precracked Beam (SEPB) or the Chevron-Notch (CN), is usually smaller. 195 A relatively simple approach to predicting the fracture surface energy, γ, in a quantitative manner from the stoichiometric composition consists in assuming a propagating crack F I G U R E 1 6 Measured and calculated fracture toughness of various oxynitride glasses. 65,[187][188][189][190][191][192][193] Triangles indicate fracture toughness measured by chevron notched specimen technique, and crosses indicate fracture toughness measured by indentation or other techniques extends following a path disrupting the weakest links of the energy landscape and to estimate the surface energy from the bond strength and the bond concentration along this fracture surface.…”

Section: Fracture Toughness and Slow Crack Growthmentioning

confidence: 99%

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Review: Elaboration, structure, and mechanical properties of oxynitride glasses

2022

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Oxynitride glasses are glasses where threefold coordinated nitrogen atoms substitute for twofold oxygen ones, hence resulting in a larger interatomic crosslinking degree. Such glasses were first observed at the grain boundary in silicon nitride ceramics, where they govern the high-temperature behavior. Later, they were prepared as bulk materials and motivated numerous researches, thanks to their large viscosity, glass transition range, elastic moduli, hardness, and fracture toughness among inorganic and non-metallic glasses. In different chemical systems that were investigated, the synthesis routes and the sources for these exceptional mechanical properties are reviewed. Oxynitride glasses are not easy to process and suffer from the loss of transparency as nitrogen is incorporated over some critical content. Nevertheless, they are attractive "specialty" glasses in various niche areas, thanks to their large refractive index and dielectric constant, improved chemical durability, high softening point, etc., and majorly to their exceptional mechanical properties.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Fracture Toughness and Slow Crack Growthmentioning

confidence: 99%

Review: Elaboration, structure, and mechanical properties of oxynitride glasses

2022

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“…[12,33], and extended with data from Refs. [3,10,21,27,32,[34][35][36][37]. The error of G C and  is estimated to be 15% and 0.005, respectively.…”

Section: Correlating Fracture Energy With Elastic Propertiesmentioning

confidence: 99%

Fracture energy of high-Poisson's ratio oxide glasses

Gamst

Østergaard

et al. 2022

Journal of Applied Physics

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The apparent relationship between Poisson's ratio and fracture energy has been used to guide the discovery of ductile glasses with a brittle-to-ductile (BTD) transition at Poisson's ratio around 0.32. Most organic and metallic glasses possess Poisson's ratio above 0.32, and thus, feature fracture energy that is around three orders of magnitude higher than that of oxide glasses, which feature Poisson's ratio typically below 0.30. However, whether the BTD transition can also be observed in oxide glasses remains unknown due to the lack of fracture energy measurements on oxide glasses with high Poisson's ratio. In this work, we measure the fracture energy of six oxide glasses with high Poisson's ratio between 0.30 and 0.34. We find no clear relationship between the two parameters even in those that possess the same Poisson's ratio as ductile metallic glasses. This suggests that Poisson's ratio is not the main property to enhance the fracture energy of oxide glasses. To this end, we instead find a positive relation between fracture energy and Young's modulus of oxide glasses, and even for some metallic glasses, which could explain their absence of ductility.

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