Study on the Vacancy Formation in α-Phase Cu-Al Alloys by Positron Annihilation
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For Cu and α-phase Cu-Al alloys, the monovacancy formation energies which are in the linear decrease with increasing of the Al concentration have been obtained by means of the angular correlation method in positron annihilation. The results show that the formation energy in concentrated random alloys is due to the averaged potential. The formation energy of the 2nd multivacancy (divacancy mainly),E_F^<2v>, has been obtained using data in very high temperature; E_F^<2v>=2.20±0.05 eV for Cu, 2.30±0.06 eV for Cu-2.0 Al, the values of E_F^<2v> for other alloys are too large, do not show suitable values. The peak value curves for the substances have been obtained in the temperature under and above the melting point also.
- 社団法人日本物理学会の論文
- 1975-10-15
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