A two-dimensional structure map for prediction of the transition-metal Laves phases
A two-dimensional structure map for prediction of the transition-metal Laves phases
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用于预测过渡金属拉夫斯相的二维结构图
DOI:
10.1016/j.commatsci.2016.08.023
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发表时间:
2016-12
影响因子:
3.3
通讯作者:
Zhiping Luo
中科院分区:
文献类型:
--
作者:
Yong Xian;Hongxing Zheng;Qijie Zhai;Zhiping Luo
Although it is well accepted that atomic size and electronic factors control the formation of transition-metal (TM) Laves phases, a geometrical description of the occurrence of the TM-TM Laves phases is lacking. In this paper, a two-dimensional structure map is proposed to predict the Laves phases using atomic radius ratio (R) andd-electron total count (DET) as coordinates, whereDETis empirically developed to describe the bonding features in the TM-TM Laves phases. Within the structure map, the criterionR> 1.116 is found for the formation of 16-coordinated Frank-Kasper polyhedra in TM-TM Laves phases through liquid alloys; while the narrowed range of 5 <DET< 10 may offer an empirical measurement on the formation tendency of unsaturated covalent bonds in the TM-TM systems. The existence of TM-TM Laves phases forming through liquid alloys defined in the present work satisfies bothR> 1.116 and 5 <DET< 10 simultaneously. The proposed two-dimensional structure map method provides a possible new strategy to predict the Laves phases in the TM-TM systems.
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通讯作者:
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