Hostname: page-component-76fb5796d-25wd4 Total loading time: 0 Render date: 2024-04-26T04:47:55.570Z Has data issue: false hasContentIssue false
  • English
  • Français

Surface Alteration of Nd-Bearing Zirconolite Following Hydrothermal Treatment

Published online by Cambridge University Press:  21 March 2011

Zhaoming Zhang ,
Eric R. Vance  and
Mark G. Blackford
Zhaoming Zhang
Affiliation:
Materials Division, Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, AustraliaEmail: zzx@ansto.gov.au
Eric R. Vance
Affiliation:
Materials Division, Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, AustraliaEmail: zzx@ansto.gov.au
Mark G. Blackford
Affiliation:
Materials Division, Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, AustraliaEmail: zzx@ansto.gov.au
Get access

Abstract

Static dissolution tests on Nd-bearing zirconolite were conducted in deionized water at 150°C for up to 6 months. Surfaces, both before and after aqueous dissolutions, were examined using X-ray Photoelectron Spectroscopy (XPS) and Scanning Electron Microscopy (SEM). Individual submicron-sized crystals wereobserved only on some zirconolite grains after hydrothermal treatment for one week, and were identified as brookite (possibly plus anatase) by Transmission Electron Microscopy (TEM). The number of secondary crystals present on the zirconolite surface was, however, reduced significantly after 6 months of durability testing. The results of electron microscopy studies are consistent with those obtained from XPS in that the average Ca and Ti concentrations of the top surface layer (< 5 nm) decreased slightly with respect to Zr, while the average Al concentration increased after durability testing.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 663: Symposium – Scientific Basis for Nuclear Waste management XXIV , 2000 , 285
Copyright
Copyright © Materials Research Society 2001

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Ringwood, A.E., Kesson, S.E., Reeve, K.D., Levins, D.M. and Ramm, E.J., in: Radioactive Waste Forms for the Future , eds. Lutze, W. and Ewing, R.C. (Elsevier, Amsterdam, 1988) pp. 233-334.Google Scholar
2. Vance, E.R., Begg, B.D., Day, R.A. and Ball, C.J., Mat. Res. Soc. Symp. Proc. 353, 767–774 1995).Google Scholar
3. Smith, K.L., Hart, K.P., Lumpkin, G.R., McGlinn, P., Lam, P. and Blackford, M.G., Mat. Res. Soc. Symp. Proc. 212, 167–174 1991).Google Scholar
4. Lumpkin, G.R., Smith, K.L. and Blackford, M.G., J. Mater. Res. 6, 2218–2233 1991).Google Scholar
5. Smith, K.L., Lumpkin, G.R., Blackford, M.G., Day, R.A. and Hart, K.P., J. Nucl. Mater. 190, 287–294 1992).Google Scholar
6. Lumpkin, G.R., Smith, K.L. and Blackford, M.G., Mat. Res. Soc. Symp. Proc. 353, 855–862 1995).Google Scholar
7. Smith, K.L., Colella, M., Thorogood, G.J., Blackford, M.G., Lumpkin, G.R., Hart, K.P., Prince, K., Loi, E. and Jostsons, A., Mat. Res. Soc. Symp. Proc. 465, 349–354 1997).Google Scholar
8. Turner, P.S., Jones, C.F., Myhra, S., Neall, F.B., Pham, D.K. and Smart, R.St.C., in: Surfaces and Interfaces of Ceramic Materials , eds. Dufour, L.-C. et al. (Kluwer Academic Publishers, 1989) pp. 663-690.Google Scholar
9. Zhang, Z. and Lamb, R.N., Proc. 2nd Int. Meeting of Pacific Rim Ceram. Soc., eds. Walls, P., Sorrell, C. and Ruys, A., (Aust. Ceram. Soc., Cairns, 1996) Paper 263 (CD-ROM).Google Scholar
10. Leturcq, G., McGlinn, P.J., Hart, K.P., Advocat, T., Barbe, C. and Lumpkin, G.R., Mat. Res. Soc. Symp. Proc. this volume (2000).Google Scholar
1. Pham, D.K., Myhra, S. and Turner, P.S., J. Mater. Res. 9, 3174–3182 1994).Google Scholar
12.G. Leturcq, private communications.Google Scholar