Hostname: page-component-6bf8c574d5-vmclg Total loading time: 0 Render date: 2025-02-18T06:48:32.818Z Has data issue: false hasContentIssue false
  • English
  • Français

Irradiation-Induced Amorphization and Elastic Shear Instability in Intermetallic Compounds*

Published online by Cambridge University Press:  25 February 2011

J. Koike ,
P. R. Okamoto ,
L. E. Rehn ,
R. Bhadra ,
M. H. Grimsditch  and
M. Meshh
J. Koike
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
P. R. Okamoto*
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
L. E. Rehn
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
R. Bhadra
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
M. H. Grimsditch
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
M. Meshh
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208.
*
**Dept of Materials Science and Engineering, Northwestern University, Present Address: Center for Materials Science, Los Alamos National Laboratory, Los Alamos, NM 87545.
Get access

Abstract

Previously we reported a substantial (∼ 50 %) decrease in shear modulus prior to amorphization in Kr irradiated Zr3Al, and proposed that amorphization is triggered when the crystalline lattice becomes unstable against shear stress. In the present work, the relation between amorphization and shear elastic instability has been investigated in two additional compounds (FeTi and NiAl) during room temperature irradiation with 1.7-MeV Kr+. A shear modulus was measured using Brillouin scattering; structural information was obtained in situ in a high voltage electron microscope interfaced to a tandem accelerator.

During irradiation of FeTi, chemical disordering and a large (∼40 %) decrease of shear modulus were observed, and an amorphous phase developed subsequently. In contrast, NiAl remained crystalline and chemically ordered during irradiation, and exhibited only a ∼ 10 % decrease in shear modulus. Hence, these two results provide further support that a shear instability triggers irradiation-induced amorphization. The shear instability mechanism may also apply to other solid-state amorphization techniques, e.g. hydrogen charging and mechanical deformation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 157: Symposium A – Beam-Solid Interactions: Physical Phenomena , 1989 , 777
Copyright
Copyright © Materials Research Society 1990

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.)

Footnotes

*

The work supported by DOE W-31-109-ENG-38 and NSF DMR-8411178.

References

REFERENCES

1 Rehn, L. E., Okamoto, P. R., Pearson, J., Bhadra, R. and Grimsditch, M., Phys. Rev. Lett. 59, 2987 (1987)Google Scholar
2 Okamoto, P. R., Rehn, L. E., Pearson, J., Bhadra, R. and Grimsditch, M., J. Less-Comm. Metals 140, 231 (1988)Google Scholar
3 Koike, J., Okamoto, P. R., Rehn, L. E., and Meshii, M., Mater. Res. Soc. Sym. Proc. 74, 425 (1987)Google Scholar
4 Talion, J. L., Phil. Mag. A 39, 151 (1979)Google Scholar
5 Johnson, W. L., Prog. Mater. Sei. 30, 287 (1986)Google Scholar
6 Cahn, R. W. and Johnson, W. L., J. Mater. Res. 1, 724 (1986)Google Scholar
7 Hawkins, D. T. and Hultgren, R., in Metals Handbook, 8th ed. (Americal Scociety for Metals, Metals Park, Ohio, 1973)Google Scholar
8 Brimhall, J. L., Kissinger, H. E. and Chariot, L. A., Radiation Effects 77, 237 (1983)Google Scholar
9 Urban, K., Phys. Stat. Sol. 87, 459 (1985)Google Scholar
10 Cummins, H. Z., in Light Scattering Near Phase Transitions, ed. by Cummins, H. Z. and Levanyuk, A. P. (North-Holland Pub. Co., 1983), Chap.6.Google Scholar
11 Luzzi, D. E., Mori, H., Fujita, H. and Meshii, M., Acta Metall. 34, 629 (1986)Google Scholar
12 Koike, J., Okamoto, P. R., Rehn, L. E. and Meshii, M., to be published.Google Scholar
13 Ziman, J. M., Principles of Theory of Solids, 2nd ed. (Cambridge University Press, Cambridge, 1972) p.66.Google Scholar
14 Born, M., J. Chem. Phys. 7, 591 (1939)Google Scholar
15 Durand, M. A., Phys. Rev. 50, 449 (1936)Google Scholar
16 Ida, Y., Phys. Rev. 187, 951 (1969)Google Scholar
17 Hsieh, H. and Yip, S., Phys. Rev. B 39, 7476 (1989)Google Scholar
18 Massobrio, C., Pontikis, V. and Martin, G., Phys. Rev. Lett. 62, 1142 (1989)Google Scholar
19 Meng, W. J., Okamoto, P. R., Kestel, B. J., Thompson, L. J. and Rehn, L. E., Appl. Phys. Lett. 53, 7 (1988)Google Scholar
20 Tat'yanin, YE. V., Kurdyumov, V. G. and Fedorov, V. B., Fiz. Metal. Metalloved. 62, 133 (1986)Google Scholar
21 Aleksandrova, M. M., Blank, V. D., Golobokov, A. E., Konyaev, YU. S., Zerr, A. YU. and Estrin, E. I., Phys. Stat. Sol. (a) 105, K29 (1988)Google Scholar
22 Koike, J., Parkin, D. M. and Nastasi, M. A., to be published.Google Scholar