Paper Title:

Migration of Thermal Vacancies in Quenched Pure AA1050 by Positron Annihilation

Periodical Defect and Diffusion Forum (Volume 293)
Main Theme Defects and Diffusion in Metals
Edited by David J. Fisher
Pages 19-26
DOI 10.4028/www.scientific.net/DDF.293.19
Citation Emad A. Badawi et al., 2009, Defect and Diffusion Forum, 293, 19
Online since August, 2009
Authors Emad A. Badawi, M.A. Abdel-Rahman, E.M. Hassen, M. Abdel-Rahman, M.O. Abdel-Hamed
Keywords AA1050 Ingot, Lifetime, Migration Enthalpy, Thermal Vacancies
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Abstract

A description of positron annihilation spectroscopy (PAS) in solids is given in terms of a trapping model. Data are presented for a commercial AA1050 dilute alloy ingot, and fitted to a model allowing presentation in the form of Arrhenius plots. From whence the value of the activation enthalpy, , for thermal vacancies obtained by PAS for AlFeSi is found to be 0.860.18eV.