Resumé
18 increases. We find a strong correlation between VPandHvfor the CaO/MgO series, implying that the minimum in Hv originates primarily from an increased shear flow in the mixed modifier glasses.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | 051913 |
| Tidsskrift | Applied Physics Letters |
| Vol/bind | 104 |
| Udgave nummer | 5 |
| Antal sider | 4 |
| ISSN | 0003-6951 |
| DOI | |
| Status | Udgivet - 2014 |
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Hardness and incipient plasticity in silicate glasses : Origin of the mixed modifier effect. / Kjeldsen, Jonas; Smedskjær, Morten Mattrup; Mauro, John C.; Yue, Yuanzheng.
I: Applied Physics Letters, Bind 104, Nr. 5, 051913, 2014.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review
TY - JOUR
T1 - Hardness and incipient plasticity in silicate glasses
T2 - Origin of the mixed modifier effect
AU - Kjeldsen, Jonas
AU - Smedskjær, Morten Mattrup
AU - Mauro, John C.
AU - Yue, Yuanzheng
PY - 2014
Y1 - 2014
N2 - The scaling of Vickers hardness (Hv) in oxide glasses with varying network modifier/modifier ratio is manifested as either a positive or negative deviation from linearity with a maximum deviation at the ratio of about 1:1. In an earlier study [J. Kjeldsen et al., J. Non-Cryst. Solids 369,61(2013)], we observed a minimum ofHv in CaO/MgO sodium aluminosilicate glasses at CaO/MgO = 1:1 and postulated that this minimum is linked to a maximum in plastic flow. However, the origin of this link has not been experimentally verified. In this work, we attempt to do so by exploring the links among Hv, volume recovery ratio (VR), and plastic deformation volume (VP) under indentation, glass transition temperature (Tg), Young’s modulus (E), and liquid fragility index (m) in CaO/MgO and CaO/Li2O sodium aluminosilicate glasses. We confirm the negative deviations from linearity and find that the maximum deviation (i.e., the so-called mixed modifier effect) of Hv, Tg, and m is at the modifier ratio of 1:1. These deviations increase in intensity as the total modifier concentration18 increases. We find a strong correlation between VPandHvfor the CaO/MgO series, implying that the minimum in Hv originates primarily from an increased shear flow in the mixed modifier glasses.
AB - The scaling of Vickers hardness (Hv) in oxide glasses with varying network modifier/modifier ratio is manifested as either a positive or negative deviation from linearity with a maximum deviation at the ratio of about 1:1. In an earlier study [J. Kjeldsen et al., J. Non-Cryst. Solids 369,61(2013)], we observed a minimum ofHv in CaO/MgO sodium aluminosilicate glasses at CaO/MgO = 1:1 and postulated that this minimum is linked to a maximum in plastic flow. However, the origin of this link has not been experimentally verified. In this work, we attempt to do so by exploring the links among Hv, volume recovery ratio (VR), and plastic deformation volume (VP) under indentation, glass transition temperature (Tg), Young’s modulus (E), and liquid fragility index (m) in CaO/MgO and CaO/Li2O sodium aluminosilicate glasses. We confirm the negative deviations from linearity and find that the maximum deviation (i.e., the so-called mixed modifier effect) of Hv, Tg, and m is at the modifier ratio of 1:1. These deviations increase in intensity as the total modifier concentration18 increases. We find a strong correlation between VPandHvfor the CaO/MgO series, implying that the minimum in Hv originates primarily from an increased shear flow in the mixed modifier glasses.
U2 - 10.1063/1.4864400
DO - 10.1063/1.4864400
M3 - Journal article
VL - 104
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 5
M1 - 051913
ER -