Results 21 to 30 of about 153,676 (265)

Effects of Zn and Mg Segregations on the Grain Boundary Sliding and Cohesion in Al: Ab Initio Modeling

open access: yesMetals, 2021
The formation of Zn and Mg segregations at a tilt Σ5{013} grain boundary (GB) in Al and the effects of these solutes on deformation behavior of polycrystalline Al were investigated using ab initio total energy calculations. Using a step-by-step modeling
Andrey Kuznetsov   +3 more
doaj   +1 more source

New Zirconium Diboride Polymorphs—First-Principles Calculations [PDF]

open access: yesMaterials, 2020
Two new hypothetical zirconium diboride (ZrB 2 ) polymorphs: (hP6-P6 3 /mmc-space group, no. 194) and (oP6-Pmmn-space group, no. 59), were thoroughly studied under the first-principles density functional theory calculations from the structural, mechanical and thermodynamic properties point of view.
Marcin Maździarz, Tomasz Mościcki
openaire   +2 more sources

Theoretical Study on Thermoelectric Properties and Doping Regulation of Mg3X2 (X = As, Sb, Bi)

open access: yesMetals, 2021
For searching both high-performances and better fits for near-room temperature thermoelectric materials, we here carried out a theoretical study on thermoelectric properties and doping regulation of Mg3X2 (X = As, Sb, Bi) by the combined method of first ...
Xiaofang Wang   +3 more
doaj   +1 more source

Structures, Electric Properties and STM Images of GeSe Monolayers Doped by Group IV–VI Atoms: A First-Principles Study

open access: yesCrystals, 2023
Doping is an important method to modulate the physical and chemical properties of two-dimensional materials. By substitutional doping, different group IV–VI atoms are doped in GeSe monolayers to compose the doped models, of which the effects are ...
Hao Ni   +6 more
doaj   +1 more source

Strain Effects in Gallium Nitride Adsorption on Defective and Doped Graphene: First-Principles Calculations

open access: yesCrystals, 2018
Transferable, low-stress gallium nitride grown on graphene for flexible lighting or display applications may enable next-generation optoelectronic devices. However, the growth of gallium nitride on graphene is challenging.
Han Yan   +4 more
doaj   +1 more source

First principles calculation of Manganese based half Heusler compounds

open access: yesEast European Journal of Physics, 2020
The Half-Heusler compounds exhibit a diverse range of tuneable properties including half-metallic ferromagnetism topological insulator, solar cells and thermoelectric converters.
Lalit Mohan   +4 more
doaj   +1 more source

Elastic Properties of CaSiO3 Perovskite from ab initio Molecular Dynamics

open access: yesEntropy, 2013
Ab initio molecular dynamics simulations were performed to investigate the elasticity of cubic CaSiO3 perovskite at high pressure and temperature. All three independent elastic constants for cubic CaSiO3 perovskite, C11, C12, and C44, were calculated ...
Shigeaki Ono
doaj   +1 more source

Understanding Room-Temperature Ductility of Bcc Refractory Alloys from Their Atomistic-Level Features

open access: yesMetals
Many bcc refractory alloys show excellent high-temperature mechanical properties, while their fabricability can be limited by brittleness near room temperature.
Jiayi Yan, Cheng Fu
doaj   +1 more source

First-Principles Calculation for the Influence of C and O on the Mechanical Properties of γ-TiAl Alloy at High Temperature

open access: yesMetals, 2019
The elastic constants of temperature dependence, thermal expansion coefficient and phonon dispersion relations of γ-TiAl doped with C/O have been investigated using first-principles calculations in order to gain insight into the mechanical ...
Jiahua Wang, Yong Lu, Xiaohong Shao
doaj   +1 more source

NO gas adsorption properties of MoS2 from monolayer to trilayer: a first-principles study

open access: yesMaterials Research Express, 2021
The NO gas adsorption properties of the monolayer, bilayer and trilayer MoS _2 has been studied based on the first-principles calculation. The interaction between NO and MoS _2 layers is weak physical adsorption, which is evidenced by the large distance (
Zhaohua Wang   +8 more
doaj   +1 more source

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