Abstract
Ion-irradiation was observed to transform MgAl2O4 spinel first to a metastable crystalline phase and then to an amorphous phase at cryogenic temperatures. Elastic stiffening of 15% occurred upon formation of the metastable crystalline phase. A second transformation from the metastable crystalline spinel to an amorphous state was accompanied by elastic softening of 25% relative to unirradiated spinel. This phase transformation behavior in spinel appears to be different from that in intermetallic compounds where only elastic softening associated with radiation damage accumulation is observed. A two-stage radiation damage model is proposed to explain the observed phase transformations.
Similar content being viewed by others
References
R. W. Cahn and W. L. Johnson, J. Mater. Res. 1, 724 (1986); W. L. Johnson, Prog. Mater. Sci. 30, 81 (1986).
L. E. Rehn, P. R. Okamoto, J. Pearson, R. Bhadra, and M. Grimsditch, Phys. Rev. Lett. 59, 2987 (1987).
P. R. Okamoto and M. Meshii, in Science of Advanced Materials, edited by H. Wiedersich and M. Meshii (American Society for Metals, Metals Park, OH, 1990) p. 33; N. Q. Lam and P. R. Okamoto, MRS Bull. XIX (7), 41 (1994).
R. Devanathan, N. Q. Lam, P. R. Okamoto, and M. Meshii, Phys. Rev. B 48, 42 (1993); N. Q. Lam, P. R. Okamoto, M. J. Sabochick, and R. Devanathan, J. Alloys Comp. 194, 429 (1993).
C. W. White, C. J. McHargue, P. S. Sklad, L. A. Boatner, and G. C. Farlow, Mater. Sci. Rep. 4, 41 (1989).
L. W. Hobbs and F. W. Clinard, Jr., J. Phys. Colloque 41, C6-232 (1980); F. W. Clinard, Jr., G. F. Hurley, and L. W. Hobbs, J. Nucl. Mater. 108–109, 655 (1982).
K. Nakai, K. Fukumoto, and C. Kinoshita, J. Nucl. Mater. 191–194, 630 (1992).
C. Kinoshita, K. Fukumoto, K. Fukuda, F. A. Garner, and G. W. Hollenberg, J. Nucl. Mater. 219, 143 (1995).
K. E. Sickafus, A. C. Larson, N. Yu, M. Nastasi, G. W. Hollenberg, F. A. Garner, and R. C. Bradt, J. Nucl. Mater. 219, 128 (1995).
S. J. Zinkle, J. Am. Ceram. Soc. 72, 1343 (1989); Nucl. Instrum. Meth. B 91, 234 (1994).
N. Yu, K. E. Sickafus, and M. Nastasi, Philos. Mag. Lett. 70, 235 (1994).
N. Bordes, L. M. Wang, R. C. Ewing, and K. E. Sickafus, J. Mater. Res. 10, 981 (1995).
J. F. Ziegler, J. P. Biersack, and U. Littmark, The Stopping and Range of Ions in Solids (Pergamon, New York, 1985).
W. C. Oliver and G. M. Pharr, J. Mater Res. 7, 1564 (1992).
K. E. Sickafus, N. Yu, and M. Nastasi, Nucl. Instrum. Meth. B (1995).
A. Yoneda, J. Phys. Earth 38, 19 (1990).
N. Yu, M. H. Grimsditch, R. Devanathan, K. E. Sickafus, M. Nastasi, and P. R. Okamoto, unpublished.
U. Schmocker and F. Waldner, J. Phys. C 9, L235 (1976).
R. Devanathan, K. E. Sickafus, N. Yu, and M. Nastasi, Philos. Mag. Lett. 72, 155 (1995).
S. P. Chen, M. Yan, J. D. Gale, R. W. Grimes, R. Devanathan, K. E. Sickafus, N. Yu, and M. Nastasi, Philos. Mag. Lett. 73, 51 (1996).
N. Yu, K. E. Sickafus, and M. Nastasi, in Microstructure of Irradiated Materials, edited by I. M. Robertson, L. E. Rehn, S. J. Zinkle, and W. J. Phythian (Mater. Res. Soc. Symp. Proc. 373, Pittsburgh, PA, 1995), p. 401.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Yu, N., Devanathan, R., Sickafus, K.E. et al. Radiation-induced phase transformations in MgAl2O4 spinel. Journal of Materials Research 12, 1766–1770 (1997). https://doi.org/10.1557/JMR.1997.0243
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/JMR.1997.0243