Investigation of the composition of precipitates in Al-Ag by Doppler spectroscopy of core electrons

Autor(en)

G Bischof, Viktor Gröger, Gerhard Krexner

Abstrakt

Doppier spectroscopy of core electrons is used to obtain information about the composition of silver-rich precipitates in Al-Ag. Two-dimensional annihilation spectra were recorded both for elemental Al and Ag and for an Al-6at. %Ag alloy. Experimental data are compared with calculations based on density functional theory using the generalized gradient approximation (GGA) for the positron annihilation. In accordance with earlier work positron trapping at precipitates could be found. A qualitative comparison of the experimental and theoretical momentum distributions and the quantitative analysis by means of line shape parameters enables the determination of the composition of the precipitates.

Organisation(en)

Physik Funktioneller Materialien

Externe Organisation(en)

Fachhochschule Joanneum

Seiten

51-53

Anzahl der Seiten

3

DOI

https://doi.org/10.4028/www.scientific.net/MSF.445-446.51

Publikationsdatum

2004

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/8c3b9b9d-61b1-458b-9d28-0748cde8c6cc