Theoretical predictions of the structural, mechanical and lattice dynamical properties of XW2 (X = Zr, Hf) Laves phases

Theoretical predictions of the structural, mechanical and lattice dynamical properties of XW2 (X = Zr, Hf) Laves phases
复制标题

XW2 (Xâ=âZr, Hf) Laves 相的结构、力学和晶格动力学性质的理论预测

DOI:
10.1080/14786435.2014.886024
复制
发表时间:
1928
影响因子:
1.6
通讯作者:
M.G. Pharr
M.G. Pharr
中科院分区:
材料科学3区
文献类型:
--
作者:
M. Sebastiani;K.E. Johanns;E.G. Herbert;F. Carassiti;M.G. Pharr

文献摘要

参考文献

被引文献

相似文献

采用平面波赝势密度泛函理论中的广义梯度近似方法,研究了立方相C15(空间群Fd-3 m)、六方相C14(空间群P63/mmc)和C36(空间群P63/mmc)中ZrW 2和HfW 2化合物的结构、力学和晶格动力学性质.发现立方C15相中的ZrW 2和HfW 2是最稳定的相。从计算的弹性常数,它表明,所有阶段是机械稳定的弹性稳定性标准。计算了材料的体积模量、剪切模量、杨氏模量、泊松比、德拜温度和硬度等力学性能。结果表明,ZrW 2和HfW 2化合物在B/G和Cauchy压力分析中表现为韧性。声子色散曲线,声子态密度和一些热力学性质的计算和讨论详尽考虑相。
We have investigated the structural, mechanical and lattice dynamical properties of ZrW2and HfW2compounds in cubic C15 (space group Fd-3m), hexagonal C14 (space group P63/mmc) and C36 (space group P63/mmc) phases using generalized gradient approximation within the plane-wave pseudo-potential density functional theory. We have found that ZrW2and HfW2in cubic C15 phase are the most stable among the considered phases. From calculated elastic constants, it is shown that all phases are mechanically stable according to the elastic stability criteria. The related mechanical properties, such as bulk, shear and Young moduli, Poisson’s ratio, Debye temperature and hardness have been also calculated. The results show that ZrW2and HfW2compounds are ductile in nature with respect to theB/Gand Cauchy pressure analysis. The phonon dispersion curves, phonon density of states and some thermodynamic properties are computed and discussed exhaustively for considered phases.
DOI: --
发表时间: 2013
期刊:
影响因子: --
作者:
M. Sahlberg;Jonas Aangstroem;C. Zlotea;P. Beran;M. Latroche;Cesar Pay Gómez
通讯作者: Cesar Pay Gómez
DOI: --
发表时间: 2012
期刊:
影响因子: --
作者:
M. Sahlberg;J. Ångström;C. Zlotea;P. Beran;M. Latroche;C. P. Gòmez
通讯作者: C. P. Gòmez
DOI: --
发表时间: 1972
期刊:
影响因子: --
作者:
A. Edwards
通讯作者: A. Edwards
立方 Laves 结构 LaAl2 和 YAl2 中声子和超导性的从头算研究
DOI: --
发表时间: 2012
期刊:
影响因子: --
作者:
S. Duman;H. M. Tütüncü
通讯作者: H. M. Tütüncü
二元过渡金属合金的有序预测
DOI: --
发表时间: 1987
期刊:
影响因子: --
作者:
M. Sluiter;P. Turchi;D. Fontaine
通讯作者: D. Fontaine