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Ab initio study of phonon dispersion and elastic properties of L12 intermetallics Ti3Al and Y3Al      
Yazarlar
N. Arikan
M. Ersen
H. Y. Ocak
Doç. Dr. Ahmet İYİGÖR Doç. Dr. Ahmet İYİGÖR
Kırşehir Ahi Evran Üniversitesi
Doç. Dr. Abdullah CANDAN Doç. Dr. Abdullah CANDAN
Kırşehir Ahi Evran Üniversitesi
S. Ugur
G. Ugur
R. Khenata
D. Varshney
Özet
In this paper, the structural, elastic and phonon properties of Ti3Al and Y3Al in L1(2)( Cu3Al) phase are studied by performing first- principles calculations within the generalized gradient approximation. The calculated lattice constants, static bulk moduli, first- order pressure derivative of bulk moduli and elastic constants for both compounds are reported. The phonon dispersion curves along several high- symmetry lines at the Brillouin zone, together with the corresponding phonon density of states, are determined using the first- principles linear- response approach of the density functional perturbation theory. Temperature variations of specific heat in the range of 0-500 K are obtained using the quasi- harmonic model.
Anahtar Kelimeler
Ab initio calculations, elastic constant, density functional theory, Ti3Al intermetallic compound.
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı Modern Physics Letters B
Dergi ISSN 0217-9849
Dergi Tarandığı Indeksler SCI-Expanded
Makale Dili İngilizce
Basım Tarihi 12-2013
Cilt No 27
Sayı 30
Sayfalar 1350224 / 0
Doi Numarası 10.1142/S0217984913502242
Makale Linki http://www.worldscientific.com/doi/abs/10.1142/S0217984913502242