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Electron Microscopy Study of Surface Layers of The French Son68 Nuclear Waste Glass Formed During Vapor Phase Alteration At 200 °C

Published online by Cambridge University Press:  02 July 2020

W.L. Gong ,
L.M. Wang  and
R.C. Ewing
W.L. Gong
Affiliation:
Dept. of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM87131
L.M. Wang
Affiliation:
Dept. of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM87131
R.C. Ewing
Affiliation:
Dept. of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM87131
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Extract

The objective of this study was to simulate the aqueous corrosion of the nuclear waste glass over extended periods of time using vapor phase alteration by which reaction progress of glass corrosion is accelerated to form a characteristic suite of secondary alteration phases. In this study, extensive SEM/EDS, AEM, and HRTEM have been performed on the French SON68 waste glasses which were reacted in saturated water vapor at 200 °C for 908, 1013, and 1021 days, respectively. In order to study chemistry and microstructure of surface layers, TEM specimens were prepared in cross-section using the ultramicrotomy slicing technique. In this process, small chunks containing the surface layer and a thin layer of unaltered glass were broken off from the sample surface and each of these chunks was then embedded in resin to form a block. Finally, thin sections, approximately 50-90 nm thick, were microtomed from these blocks and were transferred to holey carbon coated copper grids.

Type
Geology and Mineralogy
Information
Microscopy and Microanalysis , Volume 3 , Issue S2: Proceedings: Microscopy & Microanalysis '97, Microscopy Society of America 55th Annual Meeting, Microbeam Analysis Society 31st Annual Meeting, Histochemical Society 48th Annual Meeting, Cleveland, Ohio, August 10-14, 1997 , August 1997 , pp. 761 - 762
Copyright
Copyright © Microscopy Society of America 1997

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References

Feng, X.D., Mat. Res. Soc. Symp. Proc. 333, 55 (1995).10.1557/PROC-333-55CrossRefGoogle Scholar
Gong, W.L.et al.Res. Soc.Symp.Proc. 412, 197 (1996).10.1557/PROC-412-197CrossRefGoogle Scholar
This work is supported by the Centre D'Etudes de la Vallec du Rhöne of the Commissarat à L'Energie Atomique, France. The authors acknowledge E. Vernaz (CEA-VALRHO), J.K. Bates and W.L. Ebert (Argonne National Laboratory) for their providing the French SON68 nuclear waste glasses.Google Scholar