Hostname: page-component-8448b6f56d-t5pn6 Total loading time: 0 Render date: 2024-04-19T20:04:57.270Z Has data issue: false hasContentIssue false
  • English
  • Français

Amortization And Dynamic Recovery Of A2BO4 Structure Types During 1.5 MeV Krypton Ion-Beam Irradiation

Published online by Cambridge University Press:  15 February 2011

L. M. Wang ,
W. L. Gong  and
R. C. Ewing
L. M. Wang
Affiliation:
Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131
W. L. Gong
Affiliation:
Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131
R. C. Ewing
Affiliation:
Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131
Get access

Abstract

The temperature dependence of the critical amorphization dose, Dc, of four A2BO4 compositions, forsterite (Mg2SiO4), fayalite (Fe2SiO4), synthetic Mg2GeO4, and phenakite (Be2SiO4) was investigated by in situ TEM during 1.5 MeV Kr+ion beam irradiation at temperatures between 15 to 700 K. For the Mg- and Fe-compositions, the A-site is in octahedral coordination, and the structure is a derivative hep (Pbnm); for the Be-composition, the A- and B-sites are in tetrahedral coordination, forming corner-sharing hexagonal rings (R3). Although the Dc's were quite close at 15 K for all the four compositions (0.2–0.5 dpa), Dc increased with increasing irradiation temperature at different rates. The Dc-temperature curve is the result of competition between amorphization and dynamic recovery processes. The Dc rate of increase (highest to lowest) is: Be2SiO4, Mg2SiO4, Mg2GeO4, Fe2SiO4. At room temperature, Be2SiO4 amorphized at 1.55 dpa; Fe2SiO4, at only 0.22 dpa. Based on the Dc-temperature curves, the activation energy, Ea, of the dynamic recovery process and the critical temperature, Tc, above which complete amorphization does not occur are: 0.029, 0.047, 0.055 and 0.079 eV and 390, 550, 650 and 995 K for Be2SiO4, Mg2SiO4, Mg2GeO4 and Fe2SiO4, respectively. These results are explained in terms of the materials properties (e.g., bonding and thermodynamic stability) and cascade size which is a function of the density of the phases. Finally, we note the importance of increased amorphization cross-section, as a function of temperature (e.g., the low rate of increase of Dc with temperature for Fe2SiO4).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 321: Symposium E – Crystallization and Related Phenomena in Amorphous Materials—Ceramics, Metals, Polymers, and Semiconductors , 1993 , 405
Copyright
Copyright © Materials Research Society 1994

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. Wang, L.M., Eby, R.K., Janeczek, J. and Ewing, R.C., Nucl. Instr. and Meth. B59/60, 395 (1991).Google Scholar
2. Wang, L.M. and Ewing, R.C., Mat. Res. Soc. Symp. Proc. 235, 333 (1992).Google Scholar
3. Wang, L.M. and Ewing, R.C., MRS Bulletin XVII (5), 38 (1992).Google Scholar
4. Weber, W.J., Ewing, R.C. and Wang, L.M., J. Mater. Res., in press.Google Scholar
5. Morehead, F.F. Jr and Crowder, B.L., Radiat. Eff. 6, 27 (1970).Google Scholar
6. Koike, J., Okamoto, P.R. and Rehn, L.E., J. Mater. Res. 4, 1143 (1989).Google Scholar
7. Weber, W.J. and Wang, L.M., Mat. Res. Soc. Symp. Proc. 279, 523 (1993).Google Scholar
8. Papike, J.J., Reviews of Geophysics, 25, 1483 (1987).Google Scholar
9. Wang, L.M., Miller, M.L. and Ewing, R.C., Ultramicroscopy 51, 339 (1993).Google Scholar
10. Hazen, R.M. and Au, A. Y., Phys. Chem. Minerals 13, 69 (1986).Google Scholar
11. Allen, C.W., Funk, L.L., Ryan, E.A. and Ockers, S.T., Nucl. Instr. and Meth. B40/41, 553 (1989).Google Scholar
12. Ziegler, J.F., Biersack, J.P. and Littmark, U., The Stopping and Range of Ions in Solids (Pergamon, New York, 1985).Google Scholar
13. Robinson, K., Gibbs, G.V. and Ribbe, P.H., Science 122, 567 (1971).Google Scholar
14. Hazen, R.M., Am. Miner. 62, 286 (1977);Google Scholar
Hazen, R.M. and Prewitt, C.T., Am. Miner., 62, 309 (1977).Google Scholar
15. Meng, W.J., Okamoto, P.R., Thompson, L.J., Kestel, B.J. and Rehn, L.E., Appl. Phys. Lett. 53, 1820 (1988).Google Scholar
16. Seidel, A., Linker, G. and Meyer, O., J. less. Comm. Met. 145, 358 (1988).Google Scholar
17. Okamoto, P.R. and Meshii, M., Proc. ASM Symp. on “Science of Advanced Materials”, edited by Wiedersich, H. and Meshii, M. (Chicago, IL, 1989).Google Scholar
18. Wolf, D., Okamoto, P.R., Yip, S., Lutske, J.F. and Kluge, M., J. Mater. Res. 5, 286 (1990).Google Scholar
19. Morioka, M., Geochim. Cosmochim. Acta. 45, 1573 (1981).Google Scholar
20. Hood, G.M., J. Nucl. Mater. 139, 179 (1986).Google Scholar
21. Rashid, R.I.M.A. and March, N.H., Phys. Chem. Lig. 19, 41 (1989).Google Scholar