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Study of Point Defects in Intermetallic Compound Ni3Al

Published online by Cambridge University Press:  01 January 1992

Dongliang Lin (T.L. Lin) and
Jian Sun
Dongliang Lin (T.L. Lin)
Affiliation:
Department of Materials Science and Engineering, Shanghai JiaoTong University, Shanghai 200030, P. R. China
Jian Sun
Affiliation:
Department of Materials Science and Engineering, Shanghai JiaoTong University, Shanghai 200030, P. R. China
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Abstract

Formation energies of point defects in Ni3Al were calculated by EAM and static relaxations. The equilibrium equation of point defects in Ll2 type of intermetallic compounds was established. The concentration of point defects at 1000 K as a function of bulk composition and the effect of temperature on them was calculated for Ni3Al. The concentration of vacancies in Ni3Al with various Al and boron contents was also investigated by means of positron annihilation to verify the calculated results.

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References

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