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High Temperature Measurements of Neutron Diffuse Scattering in a FeAll9.Sat% Single Crystal. Influence of Magnetism on Chemical Order.

Published online by Cambridge University Press:  26 February 2011

V. Pierron-Bohnes ,
M.C. Cadeville ,
O. Schaerpf  and
A. Finel
V. Pierron-Bohnes
Affiliation:
Universitd Louis Pasteur, 4 rue Blaise Pascal, F–67070 Strasbourg
M.C. Cadeville
Affiliation:
Universitd Louis Pasteur, 4 rue Blaise Pascal, F–67070 Strasbourg
O. Schaerpf
Affiliation:
Institut Laüe Langevin, 156 X, F–38042, Grenoble
A. Finel
Affiliation:
ONERA, 29 avenue de la division Leclerc, F–92320 Chitillon-sous-Bagneux
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Abstract

The influence of magnetism on atomic short range order is shown in a single crystalline FeAl19.sat% alloy in the disordered phase. The short range order has been measured in the paramagnetic state between 973 and 1573 K on D7 at ILL through neutron diffuse scattering in the [110] plane. The effective pair interaction potentials V1 , V2, V3 and V5 are calculated through an inverse cluster variation method. The results are compared to those obtained through X-ray diffuse scattering on the same alloy frozen in the ferromagnetic order state at 772 K. The effect of magnetic coupling on the atomic order is the most important on the 1st effective potential, which is smaller by about a factor 2 in the ferromagnetic phase than in the paramagnetic one.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 213: Symposium Q – High-Temperature Ordered Intermetallic Alloys IV , 1990 , 69
Copyright
Copyright © Materials Research Society 1991

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References

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