Intermetallics, which encompass a wide range of compounds, often exhibit similar or closely related crystal structures, resulting in various intermetallic systems with structurally derivative phases. This study examines the hypothesis that deformation behavior can be transferred from fundamental building blocks to structurally related phases using the binary samarium‐cobalt system. SmCo2 and SmCo5 are investigated as fundamental building blocks and compared them to the structurally related SmCo3 and Sm2Co17 phases. Nanoindentation and micropillar compression tests are performed to characterize the primary slip systems, complemented by generalized stacking fault energy (GSFE) calculations via atomic‐scale modeling. The results show that while elastic properties of the structurally complex phases follow a rule of mixtures, their plastic deformation mechanisms are more intricate, influenced by the stacking and bonding nature within the crystal's building blocks. These findings underscore the importance of local bonding environments in predicting the mechanical behavior of structurally related intermetallics, providing crucial insights for the development of high‐performance intermetallic materials.

中文翻译：

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超越基本构建块：结构复杂晶体中的塑性


金属间化合物包含多种化合物，通常表现出相似或密切相关的晶体结构，从而产生具有结构衍生相的各种金属间化合物体系。本研究检验了变形行为可以使用二元钐钴系统从基本构建块转移到结构相关阶段的假设。将 SmCo₂ 和 SmCo₅ 作为基本构建块进行研究，并将它们与结构相关的 SmCo₃ 和 Sm₂Co₁₇ 相进行比较。进行纳米压痕和微柱压缩测试以表征初级滑移系统，并通过原子尺度建模辅以广义堆叠故障能量 （GSFE） 计算。结果表明，虽然结构复杂相的弹性特性遵循混合物规则，但它们的塑性变形机制更加复杂，受晶体构建块内堆叠和键合性质的影响。这些发现强调了局部键合环境在预测结构相关金属间化合物的机械行为中的重要性，为高性能金属间化合物材料的开发提供了重要的见解。