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Guinier-Preston I Zones in AL-1.75 at.% Cu Single Crystals

Published online by Cambridge University Press:  28 February 2011

P.P. Mueller ,
B. Schonfeldc ,
G. Kostorz  and
W. Buehrersc
P.P. Mueller
Affiliation:
lnow at: Interkeller AG, CH-8306 Brittisellen, Switzerland
B. Schonfeldc
Affiliation:
Inst.f.Angewandte Physik, ETH Zürich, CH-8093 Zürich, Switzerland
G. Kostorz
Affiliation:
Inst.f.Angewandte Physik, ETH Zürich, CH-8093 Zürich, Switzerland
W. Buehrersc
Affiliation:
LNS/ETHZ, c/o PSI, CH-5303 Wirenlingen, Switzerland
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Abstract

The elastic diffuse neutron scattering from two Al-1.75 at.% Cu single crystals with either the isotope Cu-63 or Cu-65, aged to contain type-I Guinier-Preston zones has been measured along a reciprocal lattice line and evaluated based on an expansion of the atomic displacement scattering up to terms of third order. It is shown that erroneous results for the short-range order term are obtained if the evaluation does not include data from the first Brillouin zone. The most reliable short-range order scattering extracted for both crystals is consistent with essentially single-layered Cu-rich zones.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 138: Symposium Q – Characterization of the Structure and Chemistry of Defects in Materials , 1988 , 47
Copyright
Copyright © Materials Research Society 1989

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