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本文首先导出三元系中固溶体α与线性化合物。两相平衡方程及两平行线性化合物θ和两相平衡方程．利用Ｃｏ—Ｃｕ—Ｓｍ系１２５０℃时α（Ｃｏ、Ｃｕ、Ｓｍ）与θ—Ｓｍ２（Ｃｏ、Ｃｕ）１７·θ一Ｓｍ２（Ｃｏ、Ｃｕ）１７与—Ｓｍ（Ｃｏ、Ｃｕ）５两相平衡成分数据及Ｃｏ—Ｃｕ系中提取的Ｆ、Ｃ、Ｃ固溶体α（Ｃｏ、Ｃｕ）的热力学数据．分别求出Ｓｍ２（Ｃｏ、Ｃｕ）１７和Ｓｍ（Ｃｏ、Ｃｕ）５中Ｃｏ和Ｃｕ的交互作用参数Ｉθ＝５３４０Ｃａｌ／ｇ、ａｔ和Ｉθ＝５４３９Ｃａｌ／ｇ、ａｔ．并指出了含有Ｓｍ２（Ｃｏ、Ｃｕ）１７或Ｓｍ（Ｃｏ、Ｃｕ）５相的合金利用调幅分解以提高硬磁性的可能性和适用范围．
In this paper, we first derive the solid solution α and linear compounds in ternary system. Two Phase Equilibrium Equations and Two Parallel Linear Compounds θ and Two Phase Equilibrium Equations. In the Co-Cu-Sm system, the equilibrium between α (Co, Cu, Sm) and θm2 (Co, Cu) 17 · θ- Sm2 (Co, Cu) 17 and -Sm (Co, Cu) Composition data and thermodynamic data of F, C and C solid solution α (Co, Cu) extracted from Co-Cu system. The interaction parameters Iθ = 5340Cal / g, at and Iθ = 5439Cal / g, at were calculated for Co and Cu in Sm2 (Co, Cu) 17 and Sm (Co, Cu) 5 respectively. The possibility and applicability of the alloy containing Sm2 (Co, Cu) 17 or Sm (Co, Cu) 5 phases to improve the hard magnetic properties by amplitude modulation decomposition are also pointed out.