Indentation Behavior of Permanently Densified Oxide Glasses

Tobias Kjær Bechgaard, Kacper Januchta, Saurabh Kapoor, Morten Mattrup Smedskjær

Publikation: Konferencebidrag uden forlag/tidsskriftKonferenceabstrakt til konferenceForskningpeer review

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Resumé

Hot isostatic compression can be used as a post treatment method to tune the properties of glass materials as
well as to obtain improved understanding of the pressure-induced structural changes and densification
mechanisms, e.g., during sharp contact loading. Here, we review the pressure-induced changes in density,
structure, and indentation behavior of a range of oxide glasses, including silicates, borates, and phosphates.
The effect of compression on the structure is analyzed through both Raman and NMR spectroscopy, while
the mechanical properties are investigated using Vickers micro-indentation. The magnitude of the changes in
all macroscopic properties (e.g., density, hardness, and crack resistance) is found to correlate well with the
magnitude and type of structural change induced by hot compression. We show that the structural changes
depend largely on the type of network former, the coordination number distribution of network formers, the
number of non-bridging oxygens, and the packing efficiency in the glasses.
OriginalsprogEngelsk
Publikationsdato4 jul. 2017
StatusUdgivet - 4 jul. 2017
Begivenhed7th International Workshop on Flow and Fracture of Advanced Glasses - Utzon Center, Aalborg, Danmark
Varighed: 2 jul. 20175 jul. 2017
http://www.ffag.aau.dk

Konference

Konference7th International Workshop on Flow and Fracture of Advanced Glasses
LokationUtzon Center
LandDanmark
ByAalborg
Periode02/07/201705/07/2017
Internetadresse

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indentation
oxides
glass
borates
coordination number
silicates
phosphates
hardness
cracks
Raman spectroscopy
mechanical properties
nuclear magnetic resonance
oxygen
spectroscopy

Citer dette

Bechgaard, T. K., Januchta, K., Kapoor, S., & Smedskjær, M. M. (2017). Indentation Behavior of Permanently Densified Oxide Glasses. Abstract fra 7th International Workshop on Flow and Fracture of Advanced Glasses, Aalborg, Danmark.
Bechgaard, Tobias Kjær ; Januchta, Kacper ; Kapoor, Saurabh ; Smedskjær, Morten Mattrup. / Indentation Behavior of Permanently Densified Oxide Glasses. Abstract fra 7th International Workshop on Flow and Fracture of Advanced Glasses, Aalborg, Danmark.
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Bechgaard, TK, Januchta, K, Kapoor, S & Smedskjær, MM 2017, 'Indentation Behavior of Permanently Densified Oxide Glasses' 7th International Workshop on Flow and Fracture of Advanced Glasses, Aalborg, Danmark, 02/07/2017 - 05/07/2017, .

Indentation Behavior of Permanently Densified Oxide Glasses. / Bechgaard, Tobias Kjær; Januchta, Kacper; Kapoor, Saurabh; Smedskjær, Morten Mattrup.

2017. Abstract fra 7th International Workshop on Flow and Fracture of Advanced Glasses, Aalborg, Danmark.

Publikation: Konferencebidrag uden forlag/tidsskriftKonferenceabstrakt til konferenceForskningpeer review

TY - ABST

T1 - Indentation Behavior of Permanently Densified Oxide Glasses

AU - Bechgaard, Tobias Kjær

AU - Januchta, Kacper

AU - Kapoor, Saurabh

AU - Smedskjær, Morten Mattrup

PY - 2017/7/4

Y1 - 2017/7/4

N2 - Hot isostatic compression can be used as a post treatment method to tune the properties of glass materials aswell as to obtain improved understanding of the pressure-induced structural changes and densificationmechanisms, e.g., during sharp contact loading. Here, we review the pressure-induced changes in density,structure, and indentation behavior of a range of oxide glasses, including silicates, borates, and phosphates.The effect of compression on the structure is analyzed through both Raman and NMR spectroscopy, whilethe mechanical properties are investigated using Vickers micro-indentation. The magnitude of the changes inall macroscopic properties (e.g., density, hardness, and crack resistance) is found to correlate well with themagnitude and type of structural change induced by hot compression. We show that the structural changesdepend largely on the type of network former, the coordination number distribution of network formers, thenumber of non-bridging oxygens, and the packing efficiency in the glasses.

AB - Hot isostatic compression can be used as a post treatment method to tune the properties of glass materials aswell as to obtain improved understanding of the pressure-induced structural changes and densificationmechanisms, e.g., during sharp contact loading. Here, we review the pressure-induced changes in density,structure, and indentation behavior of a range of oxide glasses, including silicates, borates, and phosphates.The effect of compression on the structure is analyzed through both Raman and NMR spectroscopy, whilethe mechanical properties are investigated using Vickers micro-indentation. The magnitude of the changes inall macroscopic properties (e.g., density, hardness, and crack resistance) is found to correlate well with themagnitude and type of structural change induced by hot compression. We show that the structural changesdepend largely on the type of network former, the coordination number distribution of network formers, thenumber of non-bridging oxygens, and the packing efficiency in the glasses.

M3 - Conference abstract for conference

ER -

Bechgaard TK, Januchta K, Kapoor S, Smedskjær MM. Indentation Behavior of Permanently Densified Oxide Glasses. 2017. Abstract fra 7th International Workshop on Flow and Fracture of Advanced Glasses, Aalborg, Danmark.