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RECo_5型金属间化合物具有较大的实用价值,它的磁性及热膨胀反常现象既具有理论探讨的意义,又直接影响材料的工艺和使用特性。有关这类合金的磁学、力性、热膨胀反常、晶体结构以及元素置换的宏观作用都已有所报道。我们的兴趣则在于研究以铜置换2C晶位钴所引起的电子效应,以期对元素置换问题给出某些理论信息。从而对适宜选择微量合金化元素给出预期或作出判断。
RECo_5-type intermetallic compounds have great practical value, its magnetic and thermal expansion anomalies not only have the significance of theoretical discussion, but also directly affect the material’s process and use characteristics. Magnetism, mechanical properties, thermal expansion anomalies, crystal structure and elemental displacements of these alloys have all been reported. Our interest lies in the study of the electronic effects caused by the replacement of the 2C-site cobalt with copper in order to give some theoretical information on the element substitution problem. Thus, the appropriate selection of trace alloying elements is given or expected to be judged.