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论文类型：期刊论文

发表时间：2015-05-01

发表刊物：SCIENCE CHINA-MATERIALS

收录刊物：SCIE

卷号：58

期号：5

页面范围：355-362

ISSN号：2095-8226

摘要：It was recently known that the compositions of industrial alloy specifications generally satisfy simple composition formulas issued from short-range-order structural units in their basic solid solutions. In present work, Cu-Ni face-centered-cubic alloys were further addressed by introducing the cluster-plus-glue-atom model for the short-range-order structural descriptions. Composition formulas covering only the first twelve and the second six neighbor shells in the face-centered-cubic lattice are proposed, [Cu-Cu-12](Cu, Ni)(6) for the Cu-rich alloys and [Ni-Ni-12]Cu-6 similar to [Ni-Ni-12](Cu5Ni) for Monel alloy, the only Ni-rich alloy specficiation, where the square-bracketed part represents a cuboctahedral cluster. The alloy specification selection is also discussed in terms of valence electron numbers per unit formula. The present work confirms that well-established industrial alloys have simple composition rules that reflect the intrinsic short-range-order local structures in the solid solutions.