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On the Diffusion Behaviour in Stressed Ni-Zr Couples

Published online by Cambridge University Press:  26 July 2012

G. Mazzone ,
A. Montone  and
M. Vittori Antisari
G. Mazzone
Affiliation:
ENEA, Divisione Scienza dei Materiali, CRE Casaccia, C.P. 2400, 00100 ROMA A.D. ITALY
A. Montone
Affiliation:
ENEA, Divisione Scienza dei Materiali, CRE Casaccia, C.P. 2400, 00100 ROMA A.D. ITALY
M. Vittori Antisari
Affiliation:
ENEA, Divisione Scienza dei Materiali, CRE Casaccia, C.P. 2400, 00100 ROMA A.D. ITALY
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Abstract

Solid state reactions at the interface of bulk Ni-Zr couples have been induced at several temperatures by compressive plastic deformation. The reaction product is an amorphous phase whose thickness increases with applied load and sample temperature. In addition, similar samples have been thermally reacted in order to measure the thermal interdiffusion coefficent in the same conditions. Measurements on stressed couples show that the interdiffusion coefficent (several orders of magnitude larger than the corresponding thermal value) follows a dual regime Arrhenius behaviour. The activation energy is independent of load and of the order of 0.2 eV in the low temperature regime extending up to 550 K. A different behaviour characterized by a single value of the activation energy in the whole temperature range has been observed in thermally treated samples.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 230: Symposium R – Phase Transformation Kinetics in Thin Films , 1991 , 27
Copyright
Copyright © Materials Research Society 1992

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