Abstract The Hume–Rothery rules are used to predict a solid-solution formation in metallic alloys. However, the parameters that guide the interactions in precipitated phases are unclear. In complex systems, such as CuAlMn-based alloys, these new phases are quite important owing to the effects on the system properties. In this study, the addition of alloying elements in Cu74.5Al15.0Mn10.5 on the atomic and electronic properties were used as parameters for a qualitative prediction of the phase equilibria. Herein, Cu74.5Al15.0Mn10.5 × 1.6 (X ∈ [Ag; Be; Co; Ga; Gd; Sb; Zr]) alloys were characterised using differential scanning calorimetry, optical microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and magnetisation measurements as a function of the applied field. The results showed that Be and Ga additions did not induce a new phase formation, whereas Ag, Co, Gd, Sb, and Zr additions promoted the production of intermetallic compounds and a new solid-solution. The formation of new phases and the equilibrium perturbance showed a strong dependence on the atomic properties and the electronic configuration of the fourth added element. Consequently, the magnetic properties were affected as a function of the fourth element addition.

中文翻译：

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合金设计：原子特性对 CuAlMn 基合金相平衡的作用

摘要 Hume-Rothery 规则用于预测金属合金中的固溶体形成。然而，指导沉淀相相互作用的参数尚不清楚。在复杂系统中，例如 CuAlMn 基合金，由于对系统性能的影响，这些新相非常重要。在本研究中，Cu74.5Al15.0Mn10.5 中合金元素的添加对原子和电子特性的影响被用作定性预测相平衡的参数。在此，Cu74.5Al15.0Mn10.5 × 1.6 (X ∈ [Ag; Be; Co; Ga; Gd; Sb; Zr]) 合金使用差示扫描量热法、光学显微镜、扫描电子显微镜、能量色散 X-射线光谱、X 射线衍射和磁化测量作为外加场的函数。结果表明，Be 和 Ga 的添加不会引起新相的形成，而 Ag、Co、Gd、Sb 和 Zr 的添加促进了金属间化合物的产生和新的固溶体。新相的形成和平衡扰动显示出对第四个添加元素的原子性质和电子配置的强烈依赖性。因此，磁性作为第四种元素添加的函数受到影响。