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An Investigation of Point Defects in NiAl Using Positron Annihilation Techniques

Published online by Cambridge University Press:  10 February 2011

Werner Puff ,
Bernd Logar  and
Adam G. Balogh
Werner Puff
Affiliation:
Institut für Technische Physik, Technische Universität Graz, Petersgasse 16, A-8010 Graz, Austria, [email protected]
Bernd Logar
Affiliation:
Institut für Technische Physik, Technische Universität Graz, Petersgasse 16, A-8010 Graz, Austria, [email protected]
Adam G. Balogh
Affiliation:
FB Materialwissenschaft, FG Dünne Schichten, Technische Hochschule Darmstadt, Petersenstraße 23, 64287 Darmstadt, Germany
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Abstract

Vacancy-like defects in NiAl in the composition range 47 at.-% < CNi < 53 at.-% are investigated by means of positron lifetime spectroscopy and Doppler-broadening measurements. The observed lifetimes in the annealed samples confirm that defects are quenched-in during the production of the samples. Isochronal annealing of samples quenched at 1600°C and after proton irradiation show that the induced defects are quite different.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 552: Symposium KK – High-Temperature Ordered Intermetallic Alloys VIII , 1998 , KK8.6.1
Copyright
Copyright © Materials Research Society 1999

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