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Your search keyword '"Xiao, Zhengbing"' showing total 19 results
Start Over Author "Xiao, Zhengbing" Publisher elsevier bv
19 results on '"Xiao, Zhengbing"'

8. Structural stabilities and thermal properties of η′-Mg2Zn5-Al2+ and η-MgZn2 phase in Al–Zn–Mg alloy: first-principles calculation and quasi-harmonic Debye approximation

Author

Shao Hongbang, Xiao Zhengbing, Huang Yuanchun, Ren Xianwei, and Liu Yu

Subjects
lcsh:TN1-997, Materials science, First-principles, Enthalpy, Thermodynamics, 02 engineering and technology, 01 natural sciences, Thermodynamic properties, Thermomechanical properties, Biomaterials, symbols.namesake, Thermoelastic damping, Phase (matter), 0103 physical sciences, Anisotropy, Elastic modulus, lcsh:Mining engineering. Metallurgy, Debye, 010302 applied physics, Strengthening phase, Isotropy, Metals and Alloys, Al–Zn–Mg alloy, Atmospheric temperature range, 021001 nanoscience & nanotechnology, Surfaces, Coatings and Films, Ceramics and Composites, symbols, Structural stabilities, 0210 nano-technology
Abstract

The structural stabilities and thermal properties of η′ and η phase at high temperature and pressure were investigated via first principles calculations combined with quasi-harmonic Debye approximation (QHA). The calculated results illustrate η′ possess high formation enthalpy with lower structural stability at high temperature, which may transits to equilibrium phase η at temperature range of 510–520 K. The calculated thermodynamic properties indicate η exhibits better thermal stability than η′ at high temperature. The thermoelastic properties of η′ and η were estimated based on the temperature-dependent elastic constants Cij(T), and it is revealed the elastic moduli of η′ are larger than that of η though both two phases become deformable with elevated temperature. Moreover, the evaluated thermoelastic anisotropies suggest η′ and η are essentially elastic isotropic on {0001} plane, while η′ exhibit serious mechanical anisotropy and angular bonding characters on both {10-10} and {01–10} planes at high temperature.

Published
2021

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