Abstract
Radiation-induced physical aging effects are studied in binary As x S100−x and As x Se100−x (30 ≤ x ≤ 42) glasses by conventional differential scanning calorimetry (DSC) method. It is shown that γ-irradiation (Co60 source, ~3 MGy dose) of glassy As x S100−x caused a measurable increase in glass transition temperature and endothermic peak area in the vicinity of glass transition region, which was associated with acceleration of structural relaxation processes in these materials. In contrast to sulfide glasses, the samples of As–Se family did not exhibit any significant changes in DSC curves after γ-irradiation. The observed difference in radiation-induced physical aging between sulfides and selenides was explained by more effective destruction-polymerization transformations and possible metastable defects formation in S-based glassy network.
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Acknowledgements
This work was partially supported by the STCU Project 4418. The PNNL authors acknowledge support from the Department of Energy, National Nuclear Security Administration, Office of Nonproliferation Research and Development (NA-22), Pacific Northwest National Laboratory, a multiprogram national laboratory operated by Battelle for the US Department of Energy under Contract DE-AC05-76RL01830.
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Golovchak, R., Shpotyuk, O., Kozdras, A. et al. Radiation effects in physical aging of binary As–S and As–Se glasses. J Therm Anal Calorim 103, 213–218 (2011). https://doi.org/10.1007/s10973-010-0876-8
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DOI: https://doi.org/10.1007/s10973-010-0876-8