Role of elastic deformation in determining the mixed alkaline earth effect of hardness in silicate glasses

Jonas Kjeldsen, Morten Mattrup Smedskjær, M. Potuzak, Yuanzheng Yue

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6 Citationer (Scopus)

Resumé

Glasses deform permanently as a result of indentation and the total resistance to deformation consists of three individual resistances, i.e., those to elastic deformation, densification, and plastic flow. The link between Vickers hardness and the resistances to densification and plastic flow has been investigated previously, but the link between the resistance to elastic deformation and hardness has not yet been studied. In this work, we investigate the link between elastic deformation during indentation and Vickers hardness in a series of mixed magnesium-barium boroaluminosilicate glasses. We show that the mixed alkaline earth effect manifests itself as deviations from linearity in shear modulus, Poisson’s ratio, glass transition temperature, liquid fragility index, hardness, volume of densification, and volume of plastic flow. We find no correlation between the elastic part of the indentation and hardness, and we thus infer that elastic deformation does not play a dominant role in determining the mixed alkaline earth effect of hardness. However, interestingly, we find a
strong correlation between Poisson’s ratio, volume of plastic flow, and hardness, by which the minimum in hardness could be explained in terms of a minimum in shear viscosity
OriginalsprogEngelsk
Artikelnummer034903
TidsskriftJournal of Applied Physics
Vol/bind117
Udgave nummer3
ISSN0021-8979
DOI
StatusUdgivet - 21 jan. 2015

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elastic deformation
silicates
hardness
plastic flow
glass
densification
indentation
Vickers hardness
Poisson ratio
shear
glass transition temperature
barium
linearity
magnesium
viscosity
deviation
liquids

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title = "Role of elastic deformation in determining the mixed alkaline earth effect of hardness in silicate glasses",
abstract = "Glasses deform permanently as a result of indentation and the total resistance to deformation consists of three individual resistances, i.e., those to elastic deformation, densification, and plastic flow. The link between Vickers hardness and the resistances to densification and plastic flow has been investigated previously, but the link between the resistance to elastic deformation and hardness has not yet been studied. In this work, we investigate the link between elastic deformation during indentation and Vickers hardness in a series of mixed magnesium-barium boroaluminosilicate glasses. We show that the mixed alkaline earth effect manifests itself as deviations from linearity in shear modulus, Poisson’s ratio, glass transition temperature, liquid fragility index, hardness, volume of densification, and volume of plastic flow. We find no correlation between the elastic part of the indentation and hardness, and we thus infer that elastic deformation does not play a dominant role in determining the mixed alkaline earth effect of hardness. However, interestingly, we find astrong correlation between Poisson’s ratio, volume of plastic flow, and hardness, by which the minimum in hardness could be explained in terms of a minimum in shear viscosity",
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Role of elastic deformation in determining the mixed alkaline earth effect of hardness in silicate glasses. / Kjeldsen, Jonas; Smedskjær, Morten Mattrup; Potuzak, M.; Yue, Yuanzheng.

I: Journal of Applied Physics, Bind 117, Nr. 3, 034903, 21.01.2015.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Role of elastic deformation in determining the mixed alkaline earth effect of hardness in silicate glasses

AU - Kjeldsen, Jonas

AU - Smedskjær, Morten Mattrup

AU - Potuzak, M.

AU - Yue, Yuanzheng

PY - 2015/1/21

Y1 - 2015/1/21

N2 - Glasses deform permanently as a result of indentation and the total resistance to deformation consists of three individual resistances, i.e., those to elastic deformation, densification, and plastic flow. The link between Vickers hardness and the resistances to densification and plastic flow has been investigated previously, but the link between the resistance to elastic deformation and hardness has not yet been studied. In this work, we investigate the link between elastic deformation during indentation and Vickers hardness in a series of mixed magnesium-barium boroaluminosilicate glasses. We show that the mixed alkaline earth effect manifests itself as deviations from linearity in shear modulus, Poisson’s ratio, glass transition temperature, liquid fragility index, hardness, volume of densification, and volume of plastic flow. We find no correlation between the elastic part of the indentation and hardness, and we thus infer that elastic deformation does not play a dominant role in determining the mixed alkaline earth effect of hardness. However, interestingly, we find astrong correlation between Poisson’s ratio, volume of plastic flow, and hardness, by which the minimum in hardness could be explained in terms of a minimum in shear viscosity

AB - Glasses deform permanently as a result of indentation and the total resistance to deformation consists of three individual resistances, i.e., those to elastic deformation, densification, and plastic flow. The link between Vickers hardness and the resistances to densification and plastic flow has been investigated previously, but the link between the resistance to elastic deformation and hardness has not yet been studied. In this work, we investigate the link between elastic deformation during indentation and Vickers hardness in a series of mixed magnesium-barium boroaluminosilicate glasses. We show that the mixed alkaline earth effect manifests itself as deviations from linearity in shear modulus, Poisson’s ratio, glass transition temperature, liquid fragility index, hardness, volume of densification, and volume of plastic flow. We find no correlation between the elastic part of the indentation and hardness, and we thus infer that elastic deformation does not play a dominant role in determining the mixed alkaline earth effect of hardness. However, interestingly, we find astrong correlation between Poisson’s ratio, volume of plastic flow, and hardness, by which the minimum in hardness could be explained in terms of a minimum in shear viscosity

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