Migration Enthalpy of Thermal Vacancies by Positron Spectroscopy
Emad A. Badawi
Faculty of Science, Department of Physics, El-Minia University, El-Minia, Egypt
Migration Enthalpy of Thermal Vacancies by Positron Spectroscopy
Emad A. Badawi
Faculty of Science, Department of Physics, El-Minia University, El-Minia, Egypt
关键词 ：
61.72.Hb ,
61.66.Dk ,
61.72.-y
Abstract ： The trapping of positrons at vacancy site in some materials provide a new and sensitive method for the equilibrium determination of point defect migration enthalpy. Data are presented for commercial Al--Mg alloys and fitted to a model allowing presentation in the form of Arrhenius plots, hence the migration enthalpy Hiv m can be determined by the positron annihilation lifetime technique. The results show that the value of Hiv m increases as the concentration of Mg increases.
Key words ：
61.72.Hb
61.66.Dk
61.72.-y
出版日期: 2005-08-01
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