Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-25T16:56:04.147Z Has data issue: false hasContentIssue false
  • English
  • Français

Point Defects and Diffusion in Ni3Ga

Published online by Cambridge University Press:  10 February 2011

T. IKEDA ,
A. Almazouzi ,
A. Funao ,
H. Numakura ,
M. Koiwa ,
Y. Shirai ,
K. Nonaka ,
W. Sprengel  and
H. Nakajima
T. IKEDA
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Kyoto 606, Japan
A. Almazouzi
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Kyoto 606, Japan
A. Funao
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Kyoto 606, Japan
H. Numakura
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Kyoto 606, Japan
M. Koiwa
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Kyoto 606, Japan
Y. Shirai
Affiliation:
Department of Materials Science and Engineering, Kyoto University, Kyoto 606, Japan
K. Nonaka
Affiliation:
Department of Materials Science and Technology, Iwate University, Morioka 020, Japan.
W. Sprengel
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki 567, Japan.
H. Nakajima
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki 567, Japan.
Get access

Abstract

The properties of intrinsic point defects and the self-diffusion behaviour of the constituent elements in Ni3Ga have been studied by positron annihilation, tracer diffusion and interdiffusion experiments. Thermal vacancies have been detected by positron lifetime measurements for specimens quenched from high temperatures. The vacancy formation energy is in the range between 1.7 and 1.8 eV, and is not dependent strongly on the composition. The tracer diffusion coefficients of Ni and Ga are of the same order of magnitude, and the interdiffusion coefficient is about 10 times larger than the diffusion coefficient of Ni. The diffusion in Ni3Ga has been found to satisfy the Darken-Manning equation, as expected from the model of the self-diffusion in this type of materials, where both the species of atoms are assumed to migrate primarily in the sub-lattice of the major element via the ordinary vacancy mechanism.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 527: Symposium Z – Diffusion Mechanisms in Crystalline Materials , 1998 , 179
Copyright
Copyright © Materials Research Society 1998

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. Yasuda, H., Nakajima, H. and Koiwa, M., Defect Diffusion Forum, 95–98 823 (1993).Google Scholar
2. Feschotte, P. and Eggimann, P., J. Less-Common Metals, 63 15 (1979).Google Scholar
3. Shirai, Y., Materia Japan, 37 61 (1998).Google Scholar
4. Aoki, K. and Izumi, O., Phys. Stat. Sol. (a), 32 657 (1975).Google Scholar
5. Badura-Gergen, K. and Schaefer, H.-E., Phys. Rev. B, 56 3032 (1977).Google Scholar
6. Nonaka, K., Arayashiki, T., Nakajima, H., Almazouzi, A., Tanaka, K., Ikeda, T., Numakura, H. and Koiwa, M., Defect Diffusion Forum, 143–147 269 (1997).Google Scholar
7. Nonaka, K., Yamaya, A., Nakajima, H., Echigoya, J., Ikeda, T. and Koiwa, M., presented at the 1997 JIM Spring Meeting, Tokyo, March 1997 (unpublished).Google Scholar
8. Ikeda, T., Almazouzi, A., Numakura, H., Koiwa, M., Sprengel, W. and Nakajima, H., Defect Diffusion Forum, 143–147 275 (1997); submitted to Acta Mater.Google Scholar
9. Nonaka, K., Arayashiki, T., Nakajima, H., Tanaka, K., Korata, T., Ikeda, Y., Numakura, H. and Koiwa, M., in Proceedings of the Third Pacific Rim International Conference on Advanced Materials and Processing, Honolulu, July 1998 (in press).Google Scholar
10. Darken, L. S., Trans. AIME, 175 184 (1948).Google Scholar
11. Manning, J. R., Acta Metall., 15 817 (1967).Google Scholar
12. Numakura, H., Ikeda, T., Koiwa, M. and Almazouzi, A., Phil. Mag. A, 77 887 (1998).Google Scholar
13. Katayama, I., Igi, S. and Kozuka, Z., Trans. Japan Inst. Metals, 15 447 (1974).Google Scholar
14. Ikeda, T., Numakura, H. and Koiwa, M., submitted to Acta Mater.Google Scholar
15. Koiwa, M. and Ishioka, S., Phil. Mag. A, 48 1 (1983).Google Scholar