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The isothermal section of Dy-Co-Cr ternary system at 500 °C

机译:Dy-Co-Cr三元体系在500°C下的等温截面

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摘要

The isothermal section of the Dy-Co-Cr ternary system at 500 °C was investigated by X-ray powder diffraction (XRD), metallography and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectroscopy (EDS). The isothermal section consists of 11 single-phase regions, 20 two-phase regions and 10 three-phase regions. The only ternary compound DyCo_(12-x)Cr_x (space group I4lmmm) with ThMni2-type structure was confirmed in this system. The homogeneity range in DyCo_(12-x)Cr_x was found to be about x = 3.6-4.4. The lattice parameters for DyC_(12-x)Cr_x with 3.6 <= x <= 4.4 are a = 0.8312-0.8334 nm and c=0.4706-0.4722 nm. The maximum solid solubilities of Cr in Dy_2Co_(17), DyCo_3 and DyCo_2 are about 16.0, 5.0 and 17.0 at.%, respectively.
机译:通过配备了能量色散X射线光谱仪(EDS)的X射线粉末衍射(XRD),金相学和扫描电子显微镜(SEM)研究了Dy-Co-Cr三元体系在500°C时的等温截面。等温段由11个单相区域,20个两相区域和10个三相区域组成。在该系统中证实了唯一具有ThMni2型结构的三元化合物DyCo_(12-x)Cr_x(空间群I4lmmm)。发现DyCo_(12-x)Cr_x的均匀性范围约为x = 3.6-4.4。具有3.6 <= x <= 4.4的DyC_(12-x)Cr_x的晶格参数为a = 0.8312-0.8334 nm和c = 0.4706-0.4722 nm。 Cr在Dy_2Co_(17),DyCo_3和DyCo_2中的最大固溶度分别约为16.0、5.0和17.0 at。%。

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