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Ion-Beam Mixing and Solid-State Reaction in Zr-Fe Multilayers

Published online by Cambridge University Press:  15 February 2011

A. Paesano Jr. ,
A. T. Motta ,
R. C. Birtcher ,
E. A. Ryan ,
S. R. Teixeira ,
M. E. Bruckmann  and
L. Amaral
A. Paesano Jr.
Affiliation:
Department of Nuclear Engineering, The Pennsylvania State University, University Park, PA, USA
A. T. Motta
Affiliation:
Department of Nuclear Engineering, The Pennsylvania State University, University Park, PA, USA
R. C. Birtcher
Affiliation:
Materials Science Division, Argonne National Laboratory, IL, USA
E. A. Ryan
Affiliation:
Materials Science Division, Argonne National Laboratory, IL, USA
S. R. Teixeira
Affiliation:
Institute of Physics, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
M. E. Bruckmann
Affiliation:
Institute of Physics, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
L. Amaral
Affiliation:
Institute of Physics, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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Abstract

Vapor-deposited Zr-Fe multilayered thin films with various wavelengths and of overall composition either 50% Fe or Fe-rich up to 57 % Fe were either irradiated with 300 keV Kr ions at temperatures from 25K to 623 K to fluences up to 2 × 1016 cm−2, or simply annealed at 773K in-situ in the Intermediate Voltage Electron Microscope at Argonne National Laboratory. Under irradiation, the final reaction product is the amorphous phase in all cases studied, but the dose to amorphization depends on the temperature and on the wavelength. In the purely thermal case (annealing at 773 K), the 50–50 composition produces the amorphous phase but for the Fe-rich multilayers the reaction products depend on the multilayer wavelength. For small wavelength, the amorphous phase is still formed, but at large wavelength the Zr-Fe crystalline intermetallic compounds appear. These results are discussed in terms of existing models of irradiation kinetics and phase selection during solid state reaction.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 439: Symposium B – Microstructure Evolution During Irradiation , 1996 , 419
Copyright
Copyright © Materials Research Society 1997

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