First-Principles Study on the Elastic Mechanical Properties and Anisotropies of Gold–Copper Intermetallic Compounds

First-Principles Study on the Elastic Mechanical Properties and Anisotropies of Gold–Copper Intermetallic Compounds

Wang, Jian (Guilin University of Electronic Technology)
Qin, Hongbo (Guilin University of Electronic Technology)
Chen, Junfu (Guangdong Academy of Sciences)
Yang, Daoguo (Guilin University of Electronic Technology)
Zhang, Kouchi (TU Delft Electronic Components, Technology and Materials)

2022

In this study, first-principles calculations were utilized to investigate the lattice constants, elastic constants, and mechanical properties of gold–copper (Au–Cu) intermetallic compounds (IMCs), including AuCu3, AuCu, and Au3Cu. We also verified the direction dependence of the Young’s modulus, shear modulus, and Poisson’s ratio of the compounds. The calculated lattice parameters agreed with the experimental data, and the single-crystal elastic constants, elastic modulus E, shear modulus G, bulk modulus B, and Poisson’s ratio ν were calculated. For the Young’s and shear moduli, AuCu3 showed the highest anisotropy, followed by AuCu and Au3Cu. The Poisson’s ratios of AuCu3 and Au3Cu crystals were isotropic on (100) and (111) crystal planes and anisotropic on the (110) crystal plane. However, the Poisson’s ratio of the AuCu crystal was anisotropic on (100) and (111) crystal planes and isotropic on the (110) crystal plane.

first-principles
Au–Cu intermetallic compounds
mechanical properties
anisotropy

http://resolver.tudelft.nl/uuid:91bf90b1-33f0-488c-a868-d6bb72f9893c

https://doi.org/10.3390/met12060959

2075-4701

Metals, 12 (6), 1-14

Institutional Repository

journal article

© 2022 Jian Wang, Hongbo Qin, Junfu Chen, Daoguo Yang, Kouchi Zhang