Universal behavior of changes in elastic moduli of hot compressed oxide glasses

Svenson, Mouritz Nolsøe; Guerette, Michael; Huang, Liping; Lönnroth, Nadja Teresia; Mauro, John C.; Rzoska, Sylwester J.; Boćkowski, Michał; Smedskjær, Morten Mattrup

doi:10.1016/j.cplett.2016.03.025

Cited by 25 publications

(35 citation statements)

References 27 publications

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“…Figure 7 shows (Figure 7b). In a recent study, a good correlation between the relative pressure-induced increase in elastic moduli and plastic compressibility was reported [55]. Our results indicate that the extent of network compaction achieved through isostatic compression treatment at T g also scales well with the increase in hardness.…”

Section: Elasticity and Hardnesssupporting

confidence: 79%

Structural origin of high crack resistance in sodium aluminoborate glasses

Januchta

Youngman

Goel

et al. 2017

Journal of Non-Crystalline Solids

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109

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Sodium aluminoborate glasses are found to exhibit favorable mechanical properties, especially high crack resistance, due to their relatively low resistance to network compaction during sharp-contact loading. We here reveal the origin of the high crack resistance by investigating changes in structure and mechanical properties in compositions ranging from peralkaline to peraluminous and by varying the pressure history through an isostatic N 2-mediated pressure treatment at elevated temperature. This approach allows us to study the composition dependence of the ease of the glassy network compaction and the accompanying changes in structure and properties, which shed light on the processes occurring during indentation. Through solid state NMR measurements, we show that the network densification involves an increase in the average coordination number of both boron and aluminum and a shortening of the sodium-oxygen bond length. These changes in the short-range order of the glassy networks manifest themselves as an increase in, e.g., density and indentation hardness. We also demonstrate that the glasses most prone to network compaction exhibit the highest damage resistance, but surprisingly the crack resistance scales better with the relative density increase achieved by the hot compression treatment rather than with the extent of densification induced by indentation. This suggests that tuning the network structure may lead to the development of more damage resistant glasses, thus addressing the main drawback of this class of materials.

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Section: Elasticity and Hardnesssupporting

confidence: 79%

Structural origin of high crack resistance in sodium aluminoborate glasses

Januchta

Youngman

Goel

et al. 2017

Journal of Non-Crystalline Solids

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109

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“…Due to the large number of points in the center of the plot, Figure 2 shows the density of C g vs. ν data points for the various glass families, which can be identified in Figure S1 in the Supporting Information. Data for the following glass types are included: metallic [9,20,56,57,58,59], oxynitrides [8,20,60,61], pure oxides [8,20,62,63,64,65,66,67,68,69,70,71,72,73], alkali silicates [8,18,24,63,65,72,74,75], alkali borates [18,64,67,68,76,77,78], alkaline earth silicates [8,79], alkali-alkaline earth borates [80], alkali-alkaline earth silicates (including Pb, Ti, and Fe) [8,20,62,65,67,73,81,82,83,84,85], phosphosilicates [82], germanosilicates [86], aluminosilicates [8,18,60,…”

Section: Resultsmentioning

confidence: 99%

“…In the Supporting Information, we discuss the assumptions (based on structural data) used to calculate C g with information from Refs. [18,46,49,53,66,68,76,81,86,87,90,96,97,99,110,111,122,123,125,126,128,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148].…”

Section: Resultsmentioning

confidence: 99%

Revisiting the Dependence of Poisson’s Ratio on Liquid Fragility and Atomic Packing Density in Oxide Glasses

et al. 2019

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Poisson’s ratio (ν) defines a material’s propensity to laterally expand upon compression, or laterally shrink upon tension for non-auxetic materials. This fundamental metric has traditionally, in some fields, been assumed to be a material-independent constant, but it is clear that it varies with composition across glasses, ceramics, metals, and polymers. The intrinsically elastic metric has also been suggested to control a range of properties, even beyond the linear-elastic regime. Notably, metallic glasses show a striking brittle-to-ductile (BTD) transition for ν-values above ~0.32. The BTD transition has also been suggested to be valid for oxide glasses, but, unfortunately, direct prediction of Poisson’s ratio from chemical composition remains challenging. With the long-term goal to discover such high-ν oxide glasses, we here revisit whether previously proposed relationships between Poisson’s ratio and liquid fragility (m) and atomic packing density (Cg) hold for oxide glasses, since this would enable m and Cg to be used as surrogates for ν. To do so, we have performed an extensive literature review and synthesized new oxide glasses within the zinc borate and aluminoborate families that are found to exhibit high Poisson’s ratio values up to ~0.34. We are not able to unequivocally confirm the universality of the Novikov-Sokolov correlation between ν and m and that between ν and Cg for oxide glass-formers, nor for the organic, ionic, chalcogenide, halogenide, or metallic glasses. Despite significant scatter, we do, however, observe an overall increase in ν with increasing m and Cg, but it is clear that additional structural details besides m or Cg are needed to predict and understand the composition dependence of Poisson’s ratio. Finally, we also infer from literature data that, in addition to high ν, high Young’s modulus is also needed to obtain glasses with high fracture toughness.

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“…An approximately linear relationship has been observed between the plastic compressibility and the pressure-induced increase in elastic moduli across a variety of glass families, irrespective of the structural transformations during compression that these glasses exhibit owing to their dramatically different chemistries ( Figure 8B) (Svenson et al, 2016a). This implies that the pressure-induced changes in elastic moduli are not governed by the specific structural changes resulting from isostatic hot compression of the various glasses up to 1 GPa, but rather by the overall degree of network densification, which is a combined effect of changes in SRO and MRO (Svenson et al, 2016a). On the other hand, a study by Deschamps et al (2014) found that the variation in the elastic moduli is dependent on the compression path taken to reach permanent densification.…”

Section: Elastic Modulimentioning

confidence: 95%

“…Reprinted from the study by Striepe et al (2013), with permission from Elsevier. (B) The normalized change in Young's modulus (ΔE/(E0P)) as a function of plastic compressibility for glasses hot compressed at their respective ambient pressure Tg value.Reprinted from the study bySvenson et al (2016a), with permission from Elsevier.…”

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confidence: 99%

Pressure-Induced Densification of Oxide Glasses at the Glass Transition

2017

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Densification of oxide glasses at the glass transition offers a novel route to develop bulk glasses with tailored properties for emerging applications. Such densification can be achieved in the technologically relevant pressure regime of up to ~1 GPa. However, the present understanding of the composition-structure-property relationships governing these glasses is limited, with key questions, e.g., related to densification mechanism, remaining largely unanswered. Recent advances in structural characterization tools and high-pressure apparatuses have prompted new research efforts. Here, we review this recent progress and the insights gained in the understanding of the influence of isostatic compression at elevated temperature (so-called hot compression) on the compositionstructure-property relationships of oxide glasses. We focus on compression at temperatures at or around the glass transition temperature (Tg), with relevant comparisons made to glasses prepared by pressure quenching and cold compression. We show that permanent densification at 1 GPa sets in at temperatures above 0.7Tg and the degree of densification increases with increasing compression temperature and time, until attaining an approximately constant value for temperatures above Tg. For glasses compressed at the same temperature/pressure conditions, we demonstrate direct relations between the degree of volume densification and the pressure-induced change in micromechanical properties such as hardness, elastic moduli, and extent of the indentation size effect across a variety of glass families. Finally, we review the results on relaxation behavior of hot-compressed glasses. In summary, all the pressure-induced changes in the structure and properties exhibit strong composition dependence. The experimental results highlight new opportunities for future investigation and identify research challenges that need to be overcome to advance the field.

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Universal behavior of changes in elastic moduli of hot compressed oxide glasses

Cited by 25 publications

References 27 publications

Structural origin of high crack resistance in sodium aluminoborate glasses

Structural origin of high crack resistance in sodium aluminoborate glasses

Revisiting the Dependence of Poisson’s Ratio on Liquid Fragility and Atomic Packing Density in Oxide Glasses

Pressure-Induced Densification of Oxide Glasses at the Glass Transition

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