Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-20T03:47:47.191Z Has data issue: false hasContentIssue false
  • English
  • Français

Ion-beam-induced formation of a stable phase at the expense of an otherwise dominant metastable phase

Published online by Cambridge University Press:  31 January 2011

E. H. Lee  and
L. K. Mansur
E. H. Lee
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
L. K. Mansur
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
Get access

Abstract

Thermal aging and irradiation experiments were carried out in Fe–Ni–Cr base alloys containing Ti or Nb as well as low levels of oxygen, nitrogen, and carbon. After aging, fine dispersions of TiC and NbC were formed. However, after irradiation the Ti-containing alloy precipitated Ti(N,O) rather than TiC, while the Nb-containing alloy precipitated NbC. Analysis of the energetics of these reactions reveals that the Ti(N,O) phase is thermodynamically more stable than the TiC phase, while the NbC phase is more stable than the NbO phase. These results are therefore consistent with observed behavior. While it is well known that irradiation can drive a system away from equilibrium, the present results show that irradiation also can catalyze the formation of a more stable phase at the expense of a persistent metastable phase.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 2 , Issue 3 , June 1987 , pp. 291 - 293
Copyright
Copyright © Materials Research Society 1987

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

1Holland, J. R., Mansur, L. K., and Potter, D. I., Phase Stability During Irradiation (The Metallurgical Society of the AIME, New York, 1981).Google Scholar
2Russell, K. C., Progress in Materials Science (Pergamon, Oxford, 1984), Vol. 28, pp. 222–434.Google Scholar
3Nolfi, F. V. Jr., Phase Transformations During Irradiation (Applied Science, Essex, England, 1983).Google Scholar
4Arkell, D. R. and Pfeil, P. C. L., J. Nucl. Mater. 12, 145 (1964).CrossRefGoogle Scholar
5Sizmann, R., J. Nucl. Mater. 69 & 70, 386 (1978).Google Scholar
6Jones, R. H., J. Nucl. Mater. 74, 163 (1978).CrossRefGoogle Scholar
7Nelson, R. S., Hudson, J. A., and Mazey, D. J., J. Nucl. Mater. 44, 318 (1972).CrossRefGoogle Scholar
8Rowcliffe, A. F. and Lee, E. H., J. Nucl. Mater. 108 & 109, 306 (1982).Google Scholar
9Wilkes, P., J. Nucl. Mater. 83, 166 (1979).CrossRefGoogle Scholar
10Berman, R. M., J. Nucl. Mater. 17, 313 (1965).CrossRefGoogle Scholar
11Chou, P. and Ghoniem, N. H., J. Nucl. Mater. 117, 55 (1983).CrossRefGoogle Scholar
12Johnson, R. A. and N. Q. Lam, Phys. Rev. 13, 4264 (1976).Google Scholar
13Okamoto, P. R. and Wiedersich, H., J. Nucl. Mater. 53, 336 (1974).CrossRefGoogle Scholar
14Lee, E. H., Maziasz, P. J., and Rowcliffe, A. F., Phase Stability During Irradiation, edited by Holland, J. R., Mansur, L. K., and Potter, D. I. (AIME, New York, 1981), p. 191.Google Scholar
15Kubaschewski, O. and Alcock, C. B., Metallurgical Thermochemistry (Permagon, Oxford, 1979), 5th ed.Google Scholar