- Tytuł:
- First-Principles Study of the Structural, Elastic, and Mechanical Properties of $Ni_3Ga$ Compound under Pressure
- Autorzy:
-
Boucetta, S.
Zegrar, F. - Powiązania:
- https://bibliotekanauki.pl/articles/1206272.pdf
- Data publikacji:
- 2014-01
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
63.20.dk
62.20.de
62.20.-x
62.50.-p - Opis:
- There was employed the density functional theory plane-wave pseudopotential method with local density approximation and generalized gradient approximation to investigate the structural, elastic and mechanical properties of the intermetallic compound $Ni_3Ga$. The calculated equilibrium lattice constant and bulk modulus are in good agreement with the experimental values. The elastic constants were determined from a linear fit of the calculated stress-strain function according to Hooke's law. From the elastic constants, the bulk modulus B, anisotropy factor A, shear modulus G, Young's modulus E and Poisson's ratio υ for $Ni_3Ga$ compound are obtained. Our results for the bulk modulus B, anisotropy factor A, shear modulus G, Young's modulus E and Poisson's ratio υ are consistent with the experimental values. The sound velocities and the Debye temperature are also predicted from elastic constants. The dependences of the elastic and mechanical properties of $Ni_3Ga$ compound on pressure were investigated for the first time. It was found that the cubic $Ni_3Ga$ compound is mechanically stable according to the elastic stability criteria and it is not elastically isotropic. By analyzing the ratio B/G, it was concluded that $Ni_3Ga$ compound is ductile in nature.
- Źródło:
-
Acta Physica Polonica A; 2014, 125, 1; 54-59
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł