On the origin of the mixed alkali effect on indentation in silicate glasses

Jonas Kjeldsen, Morten Mattrup Smedskjær, J. C. Mauro, Yuanzheng Yue

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

21 Citationer (Scopus)

Resumé

The compositional scaling of Vickers hardness (Hv) in mixed alkali oxide glasses manifests itself as a positive deviation from linearity as a function of the network modifier/modifier ratio, with a maximum deviation at the ratio of 1:1. In this work, we investigate the link between the indentation deformation processes (elastic deformation, plastic deformation, and densification) and Hv in two mixed sodium–potassium silicate glass series. We show that the mixed alkali effect in Hv originates from the nonlinear scaling of the resistance to plastic deformation. We thus confirm a direct relation between the resistance to plastic flow and Hv in mixed modifier glasses. Furthermore, we find that the mixed alkali effect also manifests itself as a positive deviation from linearity in the compositional scaling of density for glasses with high alumina content. This trend could be linked to a compaction of the network when two types of alkali ions co-exist.
OriginalsprogEngelsk
TidsskriftJournal of Non-Crystalline Solids
Vol/bind406
Sider (fra-til)22-26
Antal sider5
ISSN0022-3093
DOI
StatusUdgivet - 2014

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Silicates
Alkalies
indentation
Indentation
alkalies
silicates
Glass
glass
deviation
scaling
plastic deformation
linearity
Plastic deformation
Vickers hardness
Aluminum Oxide
plastic flow
elastic deformation
Elastic deformation
densification
Plastic flow

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title = "On the origin of the mixed alkali effect on indentation in silicate glasses",
abstract = "The compositional scaling of Vickers hardness (Hv) in mixed alkali oxide glasses manifests itself as a positive deviation from linearity as a function of the network modifier/modifier ratio, with a maximum deviation at the ratio of 1:1. In this work, we investigate the link between the indentation deformation processes (elastic deformation, plastic deformation, and densification) and Hv in two mixed sodium–potassium silicate glass series. We show that the mixed alkali effect in Hv originates from the nonlinear scaling of the resistance to plastic deformation. We thus confirm a direct relation between the resistance to plastic flow and Hv in mixed modifier glasses. Furthermore, we find that the mixed alkali effect also manifests itself as a positive deviation from linearity in the compositional scaling of density for glasses with high alumina content. This trend could be linked to a compaction of the network when two types of alkali ions co-exist.",
keywords = "Mixed alkali effect, Density, Plastic flow, Indentation, Vickers hardness, Silicate glass",
author = "Jonas Kjeldsen and Smedskj{\ae}r, {Morten Mattrup} and Mauro, {J. C.} and Yuanzheng Yue",
year = "2014",
doi = "10.1016/j.jnoncrysol.2014.09.036",
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journal = "Journal of Non-Crystalline Solids",
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On the origin of the mixed alkali effect on indentation in silicate glasses. / Kjeldsen, Jonas; Smedskjær, Morten Mattrup; Mauro, J. C.; Yue, Yuanzheng.

I: Journal of Non-Crystalline Solids, Bind 406, 2014, s. 22-26.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - On the origin of the mixed alkali effect on indentation in silicate glasses

AU - Kjeldsen, Jonas

AU - Smedskjær, Morten Mattrup

AU - Mauro, J. C.

AU - Yue, Yuanzheng

PY - 2014

Y1 - 2014

N2 - The compositional scaling of Vickers hardness (Hv) in mixed alkali oxide glasses manifests itself as a positive deviation from linearity as a function of the network modifier/modifier ratio, with a maximum deviation at the ratio of 1:1. In this work, we investigate the link between the indentation deformation processes (elastic deformation, plastic deformation, and densification) and Hv in two mixed sodium–potassium silicate glass series. We show that the mixed alkali effect in Hv originates from the nonlinear scaling of the resistance to plastic deformation. We thus confirm a direct relation between the resistance to plastic flow and Hv in mixed modifier glasses. Furthermore, we find that the mixed alkali effect also manifests itself as a positive deviation from linearity in the compositional scaling of density for glasses with high alumina content. This trend could be linked to a compaction of the network when two types of alkali ions co-exist.

AB - The compositional scaling of Vickers hardness (Hv) in mixed alkali oxide glasses manifests itself as a positive deviation from linearity as a function of the network modifier/modifier ratio, with a maximum deviation at the ratio of 1:1. In this work, we investigate the link between the indentation deformation processes (elastic deformation, plastic deformation, and densification) and Hv in two mixed sodium–potassium silicate glass series. We show that the mixed alkali effect in Hv originates from the nonlinear scaling of the resistance to plastic deformation. We thus confirm a direct relation between the resistance to plastic flow and Hv in mixed modifier glasses. Furthermore, we find that the mixed alkali effect also manifests itself as a positive deviation from linearity in the compositional scaling of density for glasses with high alumina content. This trend could be linked to a compaction of the network when two types of alkali ions co-exist.

KW - Mixed alkali effect

KW - Density

KW - Plastic flow

KW - Indentation

KW - Vickers hardness

KW - Silicate glass

U2 - 10.1016/j.jnoncrysol.2014.09.036

DO - 10.1016/j.jnoncrysol.2014.09.036

M3 - Journal article

VL - 406

SP - 22

EP - 26

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

ER -