Twelve samples of different compositions were produced by arc-melting, and studied in the as-cast state, and after annealing at 650, and 1000 °C, for 1000 h. All samples were analysed in an SEM with EDX spectroscopy to derive the microstructures and to determine the overall and phase compositions, and by XRD to derive the crystal structures. The as-cast microstructures mainly showed cored A1 (γFe,αCo,Pd), except for of three samples which showed A1 (γFe,αCo,Pd) + (αFe) and A1 (γFe,αCo,Pd) + ~ FePd 3 . Some of the phases were too fine to be analysed accurately, and some microstructures did not coarsen on annealing. Coring occurred in some samples, and remained to a lesser extent after annealing. The 1000 °C isothermal section was drawn and the system comprised mainly A1 (γFe,αCo,Pd). A miscibility gap in A1 (γFe,αCo,Pd) was identified in the 650 °C isothermal section, because there were two discrete phases, two sets of A1 peaks, and higher hardnesses. The hardness of the alloys increased with increased Fe and decreased Pd, samples with higher Co contents also had lower hardnesses, and there was a peak in the hardness at Co 20 :Fe 60 :Pd 20 (at.%) in all conditions.

中文翻译：

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Co-Fe-Pd 合金在铸态和 1000 和 650 °C 退火后的研究

通过电弧熔化生产了 12 个不同成分的样品，并在铸态下进行研究，并在 650 和 1000 °C 下退火 1000 小时后进行研究。在 SEM 中使用 EDX 光谱分析所有样品以推导出微观结构并确定整体和相组成，并通过 XRD 推导出晶体结构。铸态显微组织主要表现为带芯的 A1 (γFe,αCo,Pd)，除了三个样品显示 A1 (γFe,αCo,Pd) + (αFe) 和 A1 (γFe,αCo,Pd) + ~ FePd 3 。有些相太细而无法准确分析，有些微观结构在退火时没有变粗。在一些样品中发生了芯化，并且在退火后保持在较小的程度上。绘制了 1000 °C 等温截面，该系统主要由 A1 (γFe,αCo,Pd) 组成。A1 (γFe,αCo, Pd) 在 650 °C 等温截面中被识别，因为有两个离散相、两组 A1 峰和更高的硬度。合金的硬度随着 Fe 的增加和 Pd 的减少而增加，Co 含量较高的样品硬度也较低，并且在所有条件下，硬度均在 Co 20 :Fe 60 :Pd 20 (at.%) 处出现峰值。