Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-19T06:47:33.603Z Has data issue: false hasContentIssue false
  • English
  • Français

Ion-Irradiation-Induced Amorphization Of Cadmium Niobate Pyrochlore

Published online by Cambridge University Press:  21 March 2011

A. Meldrum ,
K. Beaty ,
L. A. Boatner  and
C. W. White
A. Meldrum
Affiliation:
Dept. of Physics, University of Alberta, Edmonton AB, T5N 2A3, Canada; Solid State
K. Beaty
Affiliation:
Dept. of Physics, University of Alberta, Edmonton AB, T5N 2A3, Canada; Solid State
L. A. Boatner
Affiliation:
Division, Oak Ridge National Laboratory, Oak Ridge TN 37831, USA
C. W. White
Affiliation:
Division, Oak Ridge National Laboratory, Oak Ridge TN 37831, USA
Get access

Abstract

Irradiation-induced amorphization of Cd2Nb2O7 pyrochlore was investigated by means of in-situ temperature-dependent ion-irradiation experiments in a transmission electron microscope, combined with ex-situ ion-implantation (at ambient temperature) and RBS/channeling analysis. The in-situ experiments were performed using Ne or Xe ions with energies of 280 and 1200 keV, respectively. For the bulk implantation experiments, the incident ion energies were 70 keV (Ne+) and 320 keV (Xe2+). The critical amorphization temperature for Cd2Nb2O7 is ∼480 K (280 keV Ne+) or ∼620 K (1200 keV Xe2+). The dose for in-situ amorphization at room temperature is 0.22 dpa for Xe2+, but is 0.65 dpa for Ne+ irradiation. Both types of experiments suggest a cascade overlap mechanism of amorphization. The results were analyzed in light of available models for the crystalline-to-amorphous transformation and were compared to previous ionirradiation experiments on other pyrochlore compositions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 650: Symposium R – Microstructural Processes in Irradiated Materials-2000 , 2000 , R5.4
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] McCauley, R.A., J. Appl. Phys. 51, 290 (1980).Google Scholar
[2] Aleshin, E. and Roy, R., J. Am. Ceram. Soc. 45, 18 (1962).Google Scholar
[3] Ringwood, A.E., Kesson, S.E., Reeve, K.D., Levins, D.M., and Ramm, E.J., in Radioactive Waste Forms for the Future, edited by Lutze, W. and Ewing, R.C. (North-Holland, Amsterdam, 1988) pp.233–334.Google Scholar
[4] Wang, S.X., Begg, B.D., Wang, L.M., Ewing, R.C., Weber, W.J., and Kutty, K.V.G., J. Mater. Res. 14, 4470 (1999).Google Scholar
[5] Smith, K.L., Zaluzec, N.J., and Lumpkin, G.R., J. Nucl. Mater. 250, 36 (1997).Google Scholar
[6] Wang, S.X., Wang, L.M., Ewing, R.C., Was, G.S., and Lumpkin, G.R., Nucl. Instr. Meth. B149, 704 (1999).Google Scholar
[7] Wang, S.X., Wang, L.M., Ewing, R.C., and Kutty, K.V.G., Nucl. Instr. Meth. B169, 135 (2000).Google Scholar
[8] Jackson, K.A., J. Mater. Res. 3, 1218 (1988).Google Scholar
[9] Weber, W.J., Ewing, R.C., and Wang, L.M., J. Mater. Res. 9, 688 (1994).Google Scholar
[10] Weber, W.J., Nucl. Instr. Meth. 166, 98 (2000).Google Scholar
[11] Carter, G. and Nobes, M.J.. J. Mater. Res. 6, 2103 (1991).Google Scholar
[12] Heera, V., Henkel, T., Kögler, R., and Skorupa, W., Phys. Rev. B 52, 15776 (1995).Google Scholar
[13] Wang, S.X., Wang, L.M., Ewing, R.C., and Doremus, R.H., J. Non-Cryst. Sol. 238, 198 (1998).Google Scholar
[14] Meldrum, A., Mat. Res. Soc. Symp. Proc. (these proceedings).Google Scholar
[15] Holland, O.W., Fathy, D., Narayan, J., and Oen, O.S., Radiat. Eff. 90, 127 (1985).Google Scholar
[16] Gibbons, J.F., Proc. IEEE 60, 1062 (1972).Google Scholar
[17] Sickafus, K.E., Minervini, L., Grimes, R.W., Valdez, J.A., Ishimaru, M., Li, F., McClellan, K.J., and Hartmann, T., Science 289, 748 (2000).Google Scholar
[18] Shannon, R.D., Acta Cryst. A32, 751 (1976).Google Scholar