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Journal articles
Hardness and toughness of sodium borosilicate glasses via Vickers's indentations
Abstract : This study investigates the mechanical response of sodium borosilicate (SBN) glasses as a function of their chemical composition. Vickers's indentation tests provide an estimate of the material hardness (H V) and indentation fracture toughness (K C VIF) plus the amount of densification/shear flow processes. Sodium content significantly impacts the glass behavior under a sharp indenter. Low sodium glasses maintain high connected networks and low Poisson's ratios (ν). This entails significant densification processes during deformation. Conversely, glasses with high sodium content, i.e. large ν, partake in a more depolymerized network favoring deformation by shear flow. As a consequence , indentation patterns differ depending on the processes occurring. Densification processes appear to hinder the formation of halfpenny median–radial cracks. Increasing ν favors shear flow and residual stresses enhance the development of halfpenny median–radial cracks. Hence, K C VIF decreases linearly with ν.
Cited literature [56 references]
https://hal-cea.archives-ouvertes.fr/cea-01366698
Contributor : Dominique Girard <>
Submitted on : Thursday, September 15, 2016 - 11:10:37 AM
Last modification on : Monday, February 10, 2020 - 6:14:06 PM
Long-term archiving on: : Friday, December 16, 2016 - 1:25:43 PM
Contributor : Dominique Girard <>
Submitted on : Thursday, September 15, 2016 - 11:10:37 AM
Last modification on : Monday, February 10, 2020 - 6:14:06 PM
Long-term archiving on: : Friday, December 16, 2016 - 1:25:43 PM
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