Chemical Durability of Glasses

Abdelouas, Abdesselam; Neeway, James J.; Grambow, Bernd

doi:10.1007/978-3-319-93728-1_12

Cited by 8 publications

(4 citation statements)

References 178 publications

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Section: Resultsmentioning

confidence: 99%

“…The main features in the n and k spectra of alteration layers formed on the ISG through corrosion in pH 7 and pH 9 solutions do not change with the duration of corrosion once the extremely low residual rate is reached (Figure S4). 16,61 In the 𝑘 spectrum of the pH 9-corroded layer shown in Figure 2B (and Figure S4B), there appears some fine features in the 500-800 cm −1 region. Those features are found to be very sensitive to the choice of optical model, especially how the interfacial region between the alteration layer and the uncorroded bulk is modeled (Figure S5).…”

Section: Obtaining Complex Refractive Index and Thickness Of Alterati...mentioning

confidence: 99%

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Impact of aqueous solution pH on network structure of corrosion‐induced surface layers of boroaluminosilicate glass

et al. 2022

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Understanding of the long‐term stability of vitrified nuclear waste glass is critical to its safe storage, but knowledge gaps remain regarding the corrosion mechanism, especially with respect to surface alteration layers whose presence changes the observed corrosion rates. Here, we report the aqueous corrosion of a model boroaluminosilicate glass at ground water relevant pHs as investigated by vibrational spectroscopy to understand the network structure of the alteration layer that we hypothesize controls the corrosion rates. Both specular reflection infrared spectroscopy and infrared variable angle spectroscopic ellipsometry were used to elucidate details of the structure of the alteration layers formed at pH 7 and pH 9. After 2312 days, the thickness of the alteration layer is found to be ∼2000 nm for corrosion at pH 7 and ∼300 nm for corrosion at pH 9. The interpretation of the vibrational spectra suggests that alteration layers formed at pH 7 and pH 9 both exhibit a porous network with "silica‐like" structures, but with differences in the bond lengths and bond angles in the glass network. Moreover, the relative abundance of the hydrous species within the porous network appears to be dependent on pH. Additionally, the spectroscopic data suggest that the B and Ca trapped in the alteration layer during the secondary corrosion of the pH 9 pre‐corroded sample in pH 3 solution are hydrated within the nano‐porous layer and not bound to the silicate network. However, the precise chemical form remains to be determined. Based on these findings, we propose that the combination of the network structure of the alteration layer and the relative abundance of hydrous species within the alteration layer act to control the transport of ionic species dissolved from the reaction front to the aqueous solution outside the glass.

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Section: Resultsmentioning

confidence: 99%

Section: Obtaining Complex Refractive Index and Thickness Of Alterati...mentioning

confidence: 99%

Impact of aqueous solution pH on network structure of corrosion‐induced surface layers of boroaluminosilicate glass

et al. 2022

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“…While solid electrolyte research to date is largely focused on crystalline inorganic materials, the amorphous equivalents of these systems (referred to as the glassy form) often have higher ionic conductivity than their homologues. No single agreed definition of a glass exists, but a stringent definition as proposed in the Springer Handbook of Glass is that 'Glasses are dense (non-fractal) isotropic and homogeneous non-crystalline solids characterised by the absence of any internal phase boundaries' [48]. From a thermodynamic perspective, glasses are the liquid structure 'frozen-in' metastably by supercooling, although they can be produced by alternative routes.…”

Section: Glassesmentioning

confidence: 99%

The role of grain boundaries in solid-state Li-metal batteries

Milan

Pasta

2022

Mater. Futures

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Despite the potential advantages promised by solid-state batteries, the success of solid-state electrolytes has not yet been fully realised. This is due in part to the lower ionic conductivity of solid electrolytes. In many solid superionic conductors, grain boundaries are found to be ionically resistive and hence contribute to this lower ionic conductivity. Additionally, in spite of the hope that solid electrolytes would inhibit lithium filaments, in most scenarios their growth is still observed, and in some polycrystalline systems this is suggested to occur along grain boundaries. It is apparent that grain boundaries affect the performance of solid-state electrolytes, however a deeper understanding is lacking. In this perspective, the current theories relating to grain boundaries in solid-state electrolytes are explored, as well as addressing some of the challenges which arise when trying to investigate their role. Glasses are presented as a possible solution to reduce the effect of grain boundaries in electrolytes. Future research directions are suggested which will aid in both understanding the role of grain boundaries, and diminishing their contribution in cases where they are detrimental.

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“…There are many fine reviews of the glass-corrosion mechanism and rates. ,,,, It is not the intent of this section to repeat these reviews. Instead, this section describes recent progress in the understanding of glass-corrosion mechanisms, focusing primarily on the last 5 years.…”

Section: Corrosion Of Glass In Aqueous Environmentsmentioning

confidence: 99%

Recent Advances in Corrosion Science Applicable To Disposal of High-Level Nuclear Waste

et al. 2021

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High-level radioactive waste is accumulating at temporary storage locations around the world and will eventually be placed in deep geological repositories. The waste forms and containers will be constructed from glass, crystalline ceramic, and metallic materials, which will eventually come into contact with water, considering that the period of performance required to allow sufficient decay of dangerous radionuclides is on the order of 105–106 years. Corrosion of the containers and waste forms in the aqueous repository environment is therefore a concern. This Review describes the recent advances of the field of materials corrosion that are relevant to fundamental materials science issues associated with the long-term performance assessment and the design of materials with improved performance, where performance is defined as resistance to aqueous corrosion. Glass, crystalline ceramics, and metals are discussed separately, and the near-field interactions of these different material classes are also briefly addressed. Finally, recommendations for future directions of study are provided.

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Chemical Durability of Glasses

Cited by 8 publications

References 178 publications

Impact of aqueous solution pH on network structure of corrosion‐induced surface layers of boroaluminosilicate glass

Impact of aqueous solution pH on network structure of corrosion‐induced surface layers of boroaluminosilicate glass

The role of grain boundaries in solid-state Li-metal batteries

Recent Advances in Corrosion Science Applicable To Disposal of High-Level Nuclear Waste

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