Migration of Thermal Vacancies in Quenched Pure AA1050 by Positron Annihilation
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 0.860.18eV.
David J. Fisher
E. A. Badawi et al., "Migration of Thermal Vacancies in Quenched Pure AA1050 by Positron Annihilation", Defect and Diffusion Forum, Vol. 293, pp. 19-26, 2009