Cluster-plus-glue-atom model and universal composition formulas [cluster](glue atom)x for BCC solid solution alloys

Chang Pang, Beibei Jiang, Yao Shi, Qing Wang, Chuang Dong

科研成果: 期刊稿件文章同行评审

53 引用 (Scopus)

摘要

The structures of solid solution alloys are characterized by chemical short-range orders that determine largely the alloy performance. In the present work, the cluster-plus-glue-atom model, which suits for the description of chemical short-range orders in solid solutions, is introduced in the structural description of BCC solid solutions. In this model, solute atoms form 1st-neighbor clusters in the solvent matrix, so that a stable solid solution is represented by a specific local unit containing the characteristic cluster plus certain number of outer-shell 2nd neighbor glue atoms, or expressed in cluster formula [cluster](glue atom)x. The cluster packing geometry is then analyzed and their structural stability is discussed in terms of cluster packing density. The cluster packing density reaches the maximum when x = 1, signifying that these alloys might possess special stabilities and henceforth good properties. Commonly-used BCC alloys in Zr-, Ti-, V-, Nb-, Ta-, Mo-, W-, and U-based systems are found to conform to the as-mentioned composition formulas, and in particular to that with x = 1, thus unveiling universal composition rules for BCC metals.

源语言英语
文章编号35204
页(从-至)63-69
页数7
期刊Journal of Alloys and Compounds
652
DOI
出版状态已出版 - 15 12月 2015
已对外发布

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