Mechanical Properties of Densified Tectosilicate Calcium-Aluminosilicate Glasses

Nicole Johnson, Lisa Lamberson, Morten Mattrup Smedskjær, Shefford Baker

Publikation: Konferencebidrag uden forlag/tidsskriftKonferenceabstrakt til konferenceForskningpeer review

Resumé

Aluminosilicate glasses are widely used in applications such as LCD glass, touchscreens for hand held devices and car windows. We have shown that the tectosilicate compositions exhibit an interesting non-monotonic variation in hardness with increasing SiO2 content. From 40% to 85 mol% SiO2, hardness and indentation modulus both decrease, consistent with the topological constraint theory. Above 85 mol% SiO2 , hardness increases rapidly with increasing SiO2 content while modulus continues to decrease. A switch from shear to densification based on the species present in the glass has been proposed to explain this behavior. To reduce densification and study shear deformation independently, a series of calcium aluminosilicate glasses with tectosilicate compositions were densified by isostatic compression in a gas pressure chamber at elevated temperatures. The compressed glasses have increased elastic modulus and hardness in comparison to their uncompressed counterparts. Structural changes during compression can inform mechanisms of deformation at the atomic scale, and linking unit deformation mechanisms to hardness is key to developing glasses that exhibit desirable mechanical properties like resistance to brittle fracture.
OriginalsprogEngelsk
Publikationsdato22 maj 2016
StatusUdgivet - 22 maj 2016
BegivenhedGlass & Optical Materials Division Meeting 2016 - The Madison Concourse Hotel and the Governor's Club, Madison, USA
Varighed: 22 jun. 201626 jun. 2016
http://ceramics.org/2016-glass-optical-materials-division-meeting-archive
http://ceramics.org/gomd2016-2

Konference

KonferenceGlass & Optical Materials Division Meeting 2016
LokationThe Madison Concourse Hotel and the Governor's Club
LandUSA
ByMadison
Periode22/06/201626/06/2016
Internetadresse

Citer dette

Johnson, N., Lamberson, L., Smedskjær, M. M., & Baker, S. (2016). Mechanical Properties of Densified Tectosilicate Calcium-Aluminosilicate Glasses. Abstract fra Glass & Optical Materials Division Meeting 2016, Madison, USA.
Johnson, Nicole ; Lamberson, Lisa ; Smedskjær, Morten Mattrup ; Baker, Shefford. / Mechanical Properties of Densified Tectosilicate Calcium-Aluminosilicate Glasses. Abstract fra Glass & Optical Materials Division Meeting 2016, Madison, USA.
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abstract = "Aluminosilicate glasses are widely used in applications such as LCD glass, touchscreens for hand held devices and car windows. We have shown that the tectosilicate compositions exhibit an interesting non-monotonic variation in hardness with increasing SiO2 content. From 40{\%} to 85 mol{\%} SiO2, hardness and indentation modulus both decrease, consistent with the topological constraint theory. Above 85 mol{\%} SiO2 , hardness increases rapidly with increasing SiO2 content while modulus continues to decrease. A switch from shear to densification based on the species present in the glass has been proposed to explain this behavior. To reduce densification and study shear deformation independently, a series of calcium aluminosilicate glasses with tectosilicate compositions were densified by isostatic compression in a gas pressure chamber at elevated temperatures. The compressed glasses have increased elastic modulus and hardness in comparison to their uncompressed counterparts. Structural changes during compression can inform mechanisms of deformation at the atomic scale, and linking unit deformation mechanisms to hardness is key to developing glasses that exhibit desirable mechanical properties like resistance to brittle fracture.",
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Johnson, N, Lamberson, L, Smedskjær, MM & Baker, S 2016, 'Mechanical Properties of Densified Tectosilicate Calcium-Aluminosilicate Glasses', Glass & Optical Materials Division Meeting 2016, Madison, USA, 22/06/2016 - 26/06/2016.

Mechanical Properties of Densified Tectosilicate Calcium-Aluminosilicate Glasses. / Johnson, Nicole; Lamberson, Lisa; Smedskjær, Morten Mattrup; Baker, Shefford.

2016. Abstract fra Glass & Optical Materials Division Meeting 2016, Madison, USA.

Publikation: Konferencebidrag uden forlag/tidsskriftKonferenceabstrakt til konferenceForskningpeer review

TY - ABST

T1 - Mechanical Properties of Densified Tectosilicate Calcium-Aluminosilicate Glasses

AU - Johnson, Nicole

AU - Lamberson, Lisa

AU - Smedskjær, Morten Mattrup

AU - Baker, Shefford

PY - 2016/5/22

Y1 - 2016/5/22

N2 - Aluminosilicate glasses are widely used in applications such as LCD glass, touchscreens for hand held devices and car windows. We have shown that the tectosilicate compositions exhibit an interesting non-monotonic variation in hardness with increasing SiO2 content. From 40% to 85 mol% SiO2, hardness and indentation modulus both decrease, consistent with the topological constraint theory. Above 85 mol% SiO2 , hardness increases rapidly with increasing SiO2 content while modulus continues to decrease. A switch from shear to densification based on the species present in the glass has been proposed to explain this behavior. To reduce densification and study shear deformation independently, a series of calcium aluminosilicate glasses with tectosilicate compositions were densified by isostatic compression in a gas pressure chamber at elevated temperatures. The compressed glasses have increased elastic modulus and hardness in comparison to their uncompressed counterparts. Structural changes during compression can inform mechanisms of deformation at the atomic scale, and linking unit deformation mechanisms to hardness is key to developing glasses that exhibit desirable mechanical properties like resistance to brittle fracture.

AB - Aluminosilicate glasses are widely used in applications such as LCD glass, touchscreens for hand held devices and car windows. We have shown that the tectosilicate compositions exhibit an interesting non-monotonic variation in hardness with increasing SiO2 content. From 40% to 85 mol% SiO2, hardness and indentation modulus both decrease, consistent with the topological constraint theory. Above 85 mol% SiO2 , hardness increases rapidly with increasing SiO2 content while modulus continues to decrease. A switch from shear to densification based on the species present in the glass has been proposed to explain this behavior. To reduce densification and study shear deformation independently, a series of calcium aluminosilicate glasses with tectosilicate compositions were densified by isostatic compression in a gas pressure chamber at elevated temperatures. The compressed glasses have increased elastic modulus and hardness in comparison to their uncompressed counterparts. Structural changes during compression can inform mechanisms of deformation at the atomic scale, and linking unit deformation mechanisms to hardness is key to developing glasses that exhibit desirable mechanical properties like resistance to brittle fracture.

M3 - Conference abstract for conference

ER -

Johnson N, Lamberson L, Smedskjær MM, Baker S. Mechanical Properties of Densified Tectosilicate Calcium-Aluminosilicate Glasses. 2016. Abstract fra Glass & Optical Materials Division Meeting 2016, Madison, USA.