Mixed cation effect in sodium aluminosilicate glasses

Jonas Kjeldsen, Morten Mattrup Smedskjær, John C. Mauro, Randall E. Youngman, Liping Huang, Yuanzheng Yue

Publikation: Konferencebidrag uden forlag/tidsskriftKonferenceabstrakt til konferenceForskningpeer review

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Resumé

While the composition dependence of Vickers hardness of network glasses has received significant attention in the glass literature, the underlying deformation mechanisms and their respective resistances are not yet fully understood. Here, we investigate the relationship among Vickers hardness, network structure, and the resistances associated with the deformation processes in mixed cation glasses by partially substituting magnesium for calcium and calcium for lithium in sodium aluminosilicate glasses. We use Raman and 27Al NMR spectroscopies to obtain insights into the structural and topological features of these glasses and we use AFM to quantify the resistances associated with each deformation process under Vickers indentation. We demonstrate that the mixed cation effect manifests itself as a maximum in the amount of bonded tetrahedral units and as a minimum in liquid fragility index, glass transition temperature, Vickers hardness, and plastic flow. The observed minima in fragility, glass transition temperature, and plastic flow are ascribed to bond weakening in the local structural environment around the network modifiers. The elastic properties of the investigated system are found to be compositionally independent. Therefore, based on the AFM measurements, we suggest that the minimum in Vickers hardness is closely correlated to the minimum in plastic flow. Both of these properties are related to the translational motion of structural units, and hence, both may be related to the same underlying topological constraints.
OriginalsprogEngelsk
Publikationsdato26 maj 2014
Antal sider1
StatusUdgivet - 26 maj 2014
Begivenhed1st Joint Meeting of DGG – ACerS GOMD - Aachen, Tyskland
Varighed: 25 maj 201430 maj 2014

Konference

Konference1st Joint Meeting of DGG – ACerS GOMD
LandTyskland
ByAachen
Periode25/05/201430/05/2014

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Vickers hardness
sodium
plastic flow
cations
glass
glass transition temperature
calcium
atomic force microscopy
translational motion
indentation
magnesium
elastic properties
lithium
nuclear magnetic resonance
liquids
spectroscopy

Citer dette

Kjeldsen, J., Smedskjær, M. M., Mauro, J. C., Youngman, R. E., Huang, L., & Yue, Y. (2014). Mixed cation effect in sodium aluminosilicate glasses. Abstract fra 1st Joint Meeting of DGG – ACerS GOMD, Aachen, Tyskland.
Kjeldsen, Jonas ; Smedskjær, Morten Mattrup ; Mauro, John C. ; Youngman, Randall E. ; Huang, Liping ; Yue, Yuanzheng. / Mixed cation effect in sodium aluminosilicate glasses. Abstract fra 1st Joint Meeting of DGG – ACerS GOMD, Aachen, Tyskland.1 s.
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Kjeldsen, J, Smedskjær, MM, Mauro, JC, Youngman, RE, Huang, L & Yue, Y 2014, 'Mixed cation effect in sodium aluminosilicate glasses', 1st Joint Meeting of DGG – ACerS GOMD, Aachen, Tyskland, 25/05/2014 - 30/05/2014.

Mixed cation effect in sodium aluminosilicate glasses. / Kjeldsen, Jonas; Smedskjær, Morten Mattrup; Mauro, John C.; Youngman, Randall E.; Huang, Liping; Yue, Yuanzheng.

2014. Abstract fra 1st Joint Meeting of DGG – ACerS GOMD, Aachen, Tyskland.

Publikation: Konferencebidrag uden forlag/tidsskriftKonferenceabstrakt til konferenceForskningpeer review

TY - ABST

T1 - Mixed cation effect in sodium aluminosilicate glasses

AU - Kjeldsen, Jonas

AU - Smedskjær, Morten Mattrup

AU - Mauro, John C.

AU - Youngman, Randall E.

AU - Huang, Liping

AU - Yue, Yuanzheng

PY - 2014/5/26

Y1 - 2014/5/26

N2 - While the composition dependence of Vickers hardness of network glasses has received significant attention in the glass literature, the underlying deformation mechanisms and their respective resistances are not yet fully understood. Here, we investigate the relationship among Vickers hardness, network structure, and the resistances associated with the deformation processes in mixed cation glasses by partially substituting magnesium for calcium and calcium for lithium in sodium aluminosilicate glasses. We use Raman and 27Al NMR spectroscopies to obtain insights into the structural and topological features of these glasses and we use AFM to quantify the resistances associated with each deformation process under Vickers indentation. We demonstrate that the mixed cation effect manifests itself as a maximum in the amount of bonded tetrahedral units and as a minimum in liquid fragility index, glass transition temperature, Vickers hardness, and plastic flow. The observed minima in fragility, glass transition temperature, and plastic flow are ascribed to bond weakening in the local structural environment around the network modifiers. The elastic properties of the investigated system are found to be compositionally independent. Therefore, based on the AFM measurements, we suggest that the minimum in Vickers hardness is closely correlated to the minimum in plastic flow. Both of these properties are related to the translational motion of structural units, and hence, both may be related to the same underlying topological constraints.

AB - While the composition dependence of Vickers hardness of network glasses has received significant attention in the glass literature, the underlying deformation mechanisms and their respective resistances are not yet fully understood. Here, we investigate the relationship among Vickers hardness, network structure, and the resistances associated with the deformation processes in mixed cation glasses by partially substituting magnesium for calcium and calcium for lithium in sodium aluminosilicate glasses. We use Raman and 27Al NMR spectroscopies to obtain insights into the structural and topological features of these glasses and we use AFM to quantify the resistances associated with each deformation process under Vickers indentation. We demonstrate that the mixed cation effect manifests itself as a maximum in the amount of bonded tetrahedral units and as a minimum in liquid fragility index, glass transition temperature, Vickers hardness, and plastic flow. The observed minima in fragility, glass transition temperature, and plastic flow are ascribed to bond weakening in the local structural environment around the network modifiers. The elastic properties of the investigated system are found to be compositionally independent. Therefore, based on the AFM measurements, we suggest that the minimum in Vickers hardness is closely correlated to the minimum in plastic flow. Both of these properties are related to the translational motion of structural units, and hence, both may be related to the same underlying topological constraints.

KW - Sodium aluminosilicate glass

KW - mixed modifier effect

KW - plastic flow

KW - vickers hardness

M3 - Conference abstract for conference

ER -

Kjeldsen J, Smedskjær MM, Mauro JC, Youngman RE, Huang L, Yue Y. Mixed cation effect in sodium aluminosilicate glasses. 2014. Abstract fra 1st Joint Meeting of DGG – ACerS GOMD, Aachen, Tyskland.