# Various effects of magnetite on international simple glass (ISG) dissolution: implications for the long-term durability of nuclear glasses

4 LCLT - Laboratoire d'Etudes du Comportement à Long Terme des matériaux de conditionnement
DE2D - Département de recherche sur les technologies pour l'enrichissement, le démantèlement et les déchets : DEN/DE2D
Abstract : Understanding the effect of near-field materials, such as iron corrosion products, on the alteration of vitreous nuclear waste is essential for modeling long-term stability of these waste forms in a geological repository. This work presents experimental results for which monoliths of International Simple Glass – a six oxide borosilicate glass –, with polished and unpolished cut sides, were aged for 70 days under oxic conditions at 90°C in a solution initially saturated in $^{29}$SiO$_2$ at pH 7; magnetite was added to the leaching environment after two months. Solution and solid analyses were performed to correlate the changes in the surface features and dissolution kinetics. It was found that magnetite primarily influences the mechanically constrained surface of the non-polished sides of the monoliths, with little to no effect on the polished surfaces. This work highlights the importance of the unique chemistry within surface cracks that invokes a drastic change in alteration of glass in environments containing iron corrosion products.
Keywords :
Document type :
Journal articles
Domain :

Cited literature [69 references]

https://hal-cea.archives-ouvertes.fr/cea-02380473
Contributor : Amplexor Amplexor <>
Submitted on : Tuesday, November 26, 2019 - 11:46:00 AM
Last modification on : Friday, June 18, 2021 - 10:07:14 AM

### File

201600003424.pdf
Files produced by the author(s)

### Citation

Lindsey Neill, S. Gin, Thomas Ducasse, Trilce de Echave, Maxime Fournier, et al.. Various effects of magnetite on international simple glass (ISG) dissolution: implications for the long-term durability of nuclear glasses. npj Materials Degradation, Nature Research 2017, 1, pp.1. ⟨10.1038/s41529-017-0001-6⟩. ⟨cea-02380473⟩

Record views