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Atomistic Image of the Kinetics of ‘Order-Order’ Reactions in Ni3Al+B

Published online by Cambridge University Press:  21 February 2011

R. Kozubski  and
W. Pfeiler
R. Kozubski
Affiliation:
on leave from Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Krakow, Poland
W. Pfeiler
Affiliation:
Institut für Festkörperphysik, University of Vienna, Strudlhofgasse 4, A-1090 Vienna, Austria
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Abstract

Isothermal ‘order-order’ relaxations in Ll2-ordered N76Al24+0.19at.%B were studied by means of residual resistometry. This method made it possible to register very fine changes in the degree of LRO occurring about 1000K below the disordering temperature.The experimental results of two simultaneous processes being involved in these order-order relaxations with a high activation energy of 4.6eV are explained with an atomistic model of atomic jumps to nn vacancies. The parallel processes are connected with selected jumps of atoms to nn vacancies on different sublattices with a high activation energy of vacancy formation being involved.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 398: Symposium C – Thermodynamics and Kinetics of Phase Transformations , 1995 , 587
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

1 Kozubski, R. and Pfeiler, W., J.Alloys Compounds 220, 237 (1995).Google Scholar
2 Kozubski, R. and Pfeiler, W., Acta Metall. Mater., in press.Google Scholar
3 Trattner, D. and Pfeiler, W., Scripta Metall. 17,909 (1983).Google Scholar
4 Wang, T.M., Shimotomai, M. and Doyama, M., J. Phys. F: Met. Phys. 14, 37 (1987).Google Scholar
5 Schaefer, H.-E., Würschum, R. and Bub, J., Materials Science Forum 105–110, 439 (1992).Google Scholar
6 Sun, J. and Lin, T.L., Acta Metall. Mater. 42, 195 (1994).Google Scholar
7 Njah, N., Gilbon, D. and Dimitrov, O., Scripta Metall. Mater., in press.Google Scholar
8 Fultz, B., in Statics and Dynamics of Alloy Phase Transformations, ed. Turchi, P.E.A. and Gonis, A., Plenum Press, New York, 1994, p. 669.Google Scholar
9 Dimitrov, C., Zhang, X. and Dimitrov, O., Acta Metall. Mater., in press.Google Scholar
10 Kim, S.M., J. Mater. Res. 6, 1455(1991).Google Scholar
11 Fultz, B., Acta metall. 37, 823 (1989).Google Scholar
12 Kozubski, R., Acta metall. mater. 41, 2565 (1993).Google Scholar
13 Lindsey, T.F. and Fultz, B., in Diffusion in Ordered Alloys, ed. Fultz, B., Cahn, R.W. and Gupta, D., The Minerals, Metals & Materials Society, 1993, p. 91.Google Scholar
14 Vives, E. and Planes, A., Phys. Rev. Lett. 68, 812 (1992).Google Scholar
15 Kozubski, R., Pfeiler, W., Pierron-Bohnes, V. and Cadeville, M.C., to be published.Google Scholar