Effect of chemical composition on borosilicate glass behavior under irradiation

Bonfils, J. de; Peuget, S.; Panczer, G.; Ligny, Dominique de; Henry, Shaun; Noël, P.-Y.; Chenet, A.; Champagnon, B.

doi:10.1016/j.jnoncrysol.2009.11.030

Cited by 123 publications

(109 citation statements)

References 34 publications

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“…Alkali borosilicate glasses present the same qualitative behavior as nuclear glasses under irradiation by heavy ions (inducing mainly ballistic effects), e.g. a swelling of a few percent, as shown by experiment and numerical simulation [1,7,8]. Radiation effects in silica have also been studied for years, with a noticeable densification under a very large range of irradiating fluxes : neutrons, electrons, and X-rays.…”

Section: Introductionmentioning

confidence: 85%

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Molecular dynamics simulation of radiation damage in glasses

Delaye

Peuget

Bureau

et al. 2011

Journal of Non-Crystalline Solids

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Section: Introductionmentioning

confidence: 85%

“…The simulation cell comprised 4000 and 3999 atoms for CJ1 and silica glass. The CJ1 glass was chosen because its behavior under irradiation shows that it is a good analog of active nuclear glasses [7,8].…”

Section: Methodsmentioning

confidence: 99%

Molecular dynamics simulation of radiation damage in glasses

Delaye

Peuget

Bureau

et al. 2011

Journal of Non-Crystalline Solids

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“…11-13 have standard borosilicate broad bands between~450-520 cm − 1 (R-Band) attributed to mixed SieOeSi and SieOeB bending and rocking [29,[38][39][40] [38].…”

Section: Pristine Conditionsmentioning

confidence: 99%

Impacts of composition and beta irradiation on phase separation in multiphase amorphous calcium borosilicates

Patel

Boizot

Facq

et al. 2017

Journal of Non-Crystalline Solids

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A B S T R A C TBorosilicate glasses for nuclear waste applications are limited in waste loading by the precipitation of watersoluble molybdates. In order to increase storage efficiency, new compositions are sought out that trap molybdenum in a water-durable CaMoO 4 crystalline phase. Factors affecting CaMoO 4 combination and glass-inglass phase separation in calcium borosilicate systems as a function of changing [MoO 3 ] and [B 2 O 3 ] are examined in this study in order to understand how competition for charge balancers affects phase separation. It further examines the influence of radiation damage on structural modifications using 0.77 to 1.34 GGy of 2.5 MeV electron radiation that replicates inelastic collisions predicted to occur over long-term storage. The resulting microstructure of separated phases and the defect structure were analyzed using electron microscopy, XRD, Raman and EPR spectroscopy prior to and post irradiation. Synthesized calcium borosilicates are observed to form an unusual heterogeneous microstructure composed of three embedded amorphous phases with a solubility limit~2.5 mol% MoO 3. Increasing [B 2 O 3 ] increased the areas of immiscibility and order of (MoO 4 ) 2 − anions, while increasing [MoO 3 ] increased both the phase separation and crystallization temperature resulting in phases closer to metastable equilibrium, and initiated clustered crystallization for [MoO 3 ] > 2.5 mol%. β-irradiation was found to have favorable properties in amorphous systems by creating structural disorder and defect assisted ion migration that thus prevented crystallization. It also increased reticulation in the borosilicate network through 6-membered boroxyl ring and Si ring cleavage to form smaller rings and isolated units. This occurred alongside an increased reduction of Mo 6 + with dose that can be correlated to molybdenum solubility.In compositions with existing CaMoO 4 crystallites, radiation caused a scattering effect, though the crystal content remained unchanged. Therefore β-irradiation can preferentially prevent crystallization in calcium borosilicates for [MoO 3 ] < 2.5 mol%, but has a smaller impact on systems with existing CaMoO 4 crystallites.

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“…between 100 and 800 cm −1 ) is badly resolved and was not studied in this work. The borate frequency region between 1250 and 1600 cm −1 assigned to the stretching of the B-O bonds attached to large borate groups [41] . This study was performed by electron microprobe analysis (EMPA) by averaging ten measurements for each sample.…”

Section: Crystallization Study Of Slowly Cooled Glasses (1°c/min)mentioning

confidence: 99%