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Gomes YHF, Logrado M, Inoue T, Nakane S, Kato Y, Yamazaki H, Yamada A, Eckert H. Structural Aspects of Ambient-Temperature Densification of Highly Crack-Resistant Borosilicate and Aluminoborosilicate Glasses: Two Case Studies Examined by Solid-State NMR. J Phys Chem B 2024; 128:3508-3520. [PMID: 38560894 DOI: 10.1021/acs.jpcb.4c00560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The structural aspects of ambient-temperature densification via pressurization at 25 GPa were studied by solid-state NMR for two case studies: An alkaline earth boroaluminosilicate glass with the composition 6CaO-3SrO-1BaO-10Al2O3-10B2O3-70SiO2 (labeled SAB) and a sodium magnesium borosilicate glass with the composition 10Na2O-10MgO-20B2O3-60SiO2 (labeled MNBS). For SAB glass, cold pressurization results in significant increases in the average coordination numbers of both boron and aluminum, in line with previous results found in hot-compressed alkali aluminoborosilicate glasses. In addition, 27Al/11B dipolar recoupling experiments reveal a significant decrease in the 11B/27Al dipolar interaction strength upon pressurization, suggesting that the higher-coordinated boron and aluminum species experience weaker magnetic interactions. While this is an expected consequence of the longer internuclear distances involving higher coordination states, the magnitude of the effect also is consistent with a decrease of average B-O-Al internuclear connectivity. By conjecture, a decreased B-O-Al connectivity may present a mechanism of plastic flow inhibiting crack initiation in aluminoborosilicate glasses. In the case of the MNBS glass, no change in the average boron coordination number was observed within experimental error; however, densification increases the extent of B-O-Si connectivity at the expense of small ring structures with dominant B-O-B connectivity. With regard to boron coordination, the data obtained for both case studies differ from those previously found in a series of alkali borosilicate glasses, which had shown an unexpected decrease in N4 upon increased pressure. The results of the present study highlight the importance of changes of medium-range order regarding densification.
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Affiliation(s)
- Yara Hellen Firmo Gomes
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador São Carlense 400, São Carlos, SP 13566-590, Brazil
| | - Millena Logrado
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität of Darmstadt, Peter-Grünberg- Straße 8, L2|04 D208, 64287 Darmstadt, Germany
| | - Tomiki Inoue
- Nippon Electric Glass Co., Ltd., 7-1, Seiran 2-chome, Otsu, Shiga 520-8639, Japan
| | - Shingo Nakane
- Nippon Electric Glass Co., Ltd., 7-1, Seiran 2-chome, Otsu, Shiga 520-8639, Japan
| | - Yoshinari Kato
- Nippon Electric Glass Co., Ltd., 7-1, Seiran 2-chome, Otsu, Shiga 520-8639, Japan
| | - Hiroki Yamazaki
- Nippon Electric Glass Co., Ltd., 7-1, Seiran 2-chome, Otsu, Shiga 520-8639, Japan
| | - Akihiro Yamada
- Department of Materials Chemistry, The University of Shiga Prefecture, 2500 Hassaka, Hikone, Shiga 522-8533, Japan
| | - Hellmut Eckert
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador São Carlense 400, São Carlos, SP 13566-590, Brazil
- Institut für Physikalische Chemie, WWU Münster, Corrensstraße 28-30, 48149 Münster, Germany
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Østergaard MB, Hansen SR, Januchta K, To T, Rzoska SJ, Bockowski M, Bauchy M, Smedskjaer MM. Revisiting the Dependence of Poisson's Ratio on Liquid Fragility and Atomic Packing Density in Oxide Glasses. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E2439. [PMID: 31370218 PMCID: PMC6696245 DOI: 10.3390/ma12152439] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 07/29/2019] [Accepted: 07/29/2019] [Indexed: 01/04/2023]
Abstract
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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Affiliation(s)
- Martin B Østergaard
- Department of Chemistry and Bioscience, Aalborg University, 9220 Aalborg East, Denmark
| | - Søren R Hansen
- Department of Chemistry and Bioscience, Aalborg University, 9220 Aalborg East, Denmark
| | - Kacper Januchta
- Department of Chemistry and Bioscience, Aalborg University, 9220 Aalborg East, Denmark
| | - Theany To
- Department of Chemistry and Bioscience, Aalborg University, 9220 Aalborg East, Denmark
| | - Sylwester J Rzoska
- Institute of High-Pressure Physics, Polish Academy of Sciences, 01-142 Warsaw, Poland
| | - Michal Bockowski
- Institute of High-Pressure Physics, Polish Academy of Sciences, 01-142 Warsaw, Poland
| | - Mathieu Bauchy
- Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, USA
| | - Morten M Smedskjaer
- Department of Chemistry and Bioscience, Aalborg University, 9220 Aalborg East, Denmark.
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Bista S, Morin EI, Stebbins JF. Response of complex networks to compression: Ca, La, and Y aluminoborosilicate glasses formed from liquids at 1 to 3 GPa pressures. J Chem Phys 2016; 144:044502. [PMID: 26827221 DOI: 10.1063/1.4940691] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Aluminoborosilicate glasses containing relatively high field strength modifiers (Ca, La, and Y) have been compressed at pressures up to 3 GPa and near the glass transition temperature (Tg) and quenched to room temperature at high pressure followed by decompression. Structural changes were quantified with high-resolution (27)Al and (11)B MAS nuclear magnetic resonance at 14.1-18.8 T. The changes with pressure in Al and B coordinations in the recovered samples are quite large with more than 50% decreases in tetrahedral aluminum ((IV)Al) and 200%-300% increases in tetrahedral boron ((IV)B). Glasses with higher field strength modifiers (La and Y) contain more high coordinated aluminum ((V,V I)Al) at all pressures studied. More high coordinated boron also correlates with higher field strength modifier if all three compositions are compared on an isothermal basis. Although lowering fictive temperature and increasing pressure both increase Al and B coordinations, our study shows that the actual mechanisms for structural changes are most probably different for temperature and pressure effects. Using a rough thermodynamic model to extrapolate to higher pressures, it appears that a simple non-bridging oxygen (NBO) consumption mechanism is not sufficient to convert all the aluminum to octahedral and boron to tetrahedral coordination, suggesting other mechanisms for structural changes could occur at high pressure as NBO becomes depleted.
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Affiliation(s)
- Saurav Bista
- Department of Geological Sciences, Stanford University, Stanford, California 94305, USA
| | - Elizabeth I Morin
- Department of Chemistry, Stanford University, Stanford, California 94305, USA
| | - Jonathan F Stebbins
- Department of Geological Sciences, Stanford University, Stanford, California 94305, USA
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