Resumé
| Originalsprog | Engelsk |
|---|---|
| Publikationsdato | 4 dec. 2014 |
| Status | Udgivet - 4 dec. 2014 |
| Begivenhed | 2014 MRS Fall Meeting - Boston, USA Varighed: 30 nov. 2014 → 5 dec. 2014 |
Konference
| Konference | 2014 MRS Fall Meeting |
|---|---|
| Land | USA |
| By | Boston |
| Periode | 30/11/2014 → 05/12/2014 |
Citer dette
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Pressure-Induced Changes in Inter-Diffusivity and Compressive Stress in Chemically Strengthened Glass. / Svenson, Mouritz Nolsøe; Thirion, Lynn M.; Youngman, Randall E.; Mauro, John C.; Rzoska, Sylwester J.; Bockowski, Michal; Smedskjær, Morten Mattrup.
2014. Abstract fra 2014 MRS Fall Meeting, Boston, USA.Publikation: Konferencebidrag uden forlag/tidsskrift › Konferenceabstrakt til konference › Forskning › peer review
TY - ABST
T1 - Pressure-Induced Changes in Inter-Diffusivity and Compressive Stress in Chemically Strengthened Glass
AU - Svenson, Mouritz Nolsøe
AU - Thirion, Lynn M.
AU - Youngman, Randall E.
AU - Mauro, John C.
AU - Rzoska, Sylwester J.
AU - Bockowski, Michal
AU - Smedskjær, Morten Mattrup
PY - 2014/12/4
Y1 - 2014/12/4
N2 - Glass exhibits a significant change in microstructure and properties when subjected to high pressure, since the short- and intermediate-range structures of a glass are tunable through compression. Understanding the link between the microscopic structure and macroscopic properties of glasses under high pressure is important, since the glass structures frozen-in under elevated pressure may give rise to properties unattainable under ambient pressure. Chemical strengthening of glass through K+-for-Na+ ion exchange is currently receiving significant interest due to the increasing demand for stronger and more damage resistant glasses. However, the interplay among isostatic compression, pressure-induced changes in alkali diffusivity, compressive stress generated through ion exchange, and the resulting mechanical properties are poorly understood. In this work, we employ a specially designed gas pressure chamber to compress bulk glass samples isostatically up to 1 GPa at elevated temperature before or after the ion exchange treatment of an industrial sodium-magnesium aluminosilicate glass. Compression of the samples prior to ion exchange leads to a decreased Na+-K+ inter-diffusivity, increased compressive stress, and slightly increased hardness. Compression after the ion exchange treatment changes the shape of the potassium-sodium diffusion profiles and significantly increases glass hardness. We discuss these results in terms of the underlying structural changes in network-modifier environments and overall network densification.
AB - Glass exhibits a significant change in microstructure and properties when subjected to high pressure, since the short- and intermediate-range structures of a glass are tunable through compression. Understanding the link between the microscopic structure and macroscopic properties of glasses under high pressure is important, since the glass structures frozen-in under elevated pressure may give rise to properties unattainable under ambient pressure. Chemical strengthening of glass through K+-for-Na+ ion exchange is currently receiving significant interest due to the increasing demand for stronger and more damage resistant glasses. However, the interplay among isostatic compression, pressure-induced changes in alkali diffusivity, compressive stress generated through ion exchange, and the resulting mechanical properties are poorly understood. In this work, we employ a specially designed gas pressure chamber to compress bulk glass samples isostatically up to 1 GPa at elevated temperature before or after the ion exchange treatment of an industrial sodium-magnesium aluminosilicate glass. Compression of the samples prior to ion exchange leads to a decreased Na+-K+ inter-diffusivity, increased compressive stress, and slightly increased hardness. Compression after the ion exchange treatment changes the shape of the potassium-sodium diffusion profiles and significantly increases glass hardness. We discuss these results in terms of the underlying structural changes in network-modifier environments and overall network densification.
M3 - Conference abstract for conference
ER -