Li Zhuang, Dong Dandan, Zhang Lei, Zhang Shuang, Wang Qing, Dong Chuang
Key Laboratory for Materials Modification by Laser, Ion and Electron Beam (Dalian University of Technology), Ministry of Education, Dalian, 116024, China.
College of Physical Science and Technology, Dalian University, Dalian, 116622, China.
Sci Rep. 2022 Feb 24;12(1):3169. doi: 10.1038/s41598-022-06893-2.
Solid solutions are the basis for most industrial alloys. However, the relationships between their characteristic short-range orders and chemical compositions have not been established. The present work combines Cowley parameter α with our cluster-plus-glue-atom model to accurately derive the chemical units of binary solid-solution alloys of face-centered cubic type. The chemical unit carries information on atomic structure and chemical composition, which explains prevailing industrial alloys. For example, chemical units in CuZn alloy with α = - 0.137 are formulated as [Zn-CuZn]ZnCu and [Zn-CuZn]ZnCu, with 64.0-70.0 wt% Cu corresponding to the most widely used cartridge brass C26000 (68.5-71.5 Cu). This work answers the long-standing question on the composition origin of solid-solution-based industrial alloys, by tracing to the molecule-like chemical units implied in chemical short-range ordering in solid solutions.
固溶体是大多数工业合金的基础。然而，它们特征性的短程有序与化学成分之间的关系尚未确定。目前的工作将考利参数α与我们的簇加胶原子模型相结合，以准确推导出面心立方型二元固溶体合金的化学单元。化学单元携带有关原子结构和化学成分的信息，这解释了常见的工业合金。例如，α = -0.137的CuZn合金中的化学单元被表述为[Zn-CuZn]ZnCu和[Zn-CuZn]ZnCu，含64.0 - 70.0 wt%铜对应于使用最广泛的弹壳黄铜C26000（含68.5 - 71.5%铜）。这项工作通过追溯固溶体化学短程有序中隐含的类分子化学单元，回答了关于基于固溶体的工业合金成分起源的长期问题。
