Solid-state phase equilibria in the Co–Pt–Pr ternary system at 1173 K
Solid-state phase equilibria in the Co–Pt–Pr ternary system at 1173 K
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DOI：
10.1016/j.jallcom.2009.03.138
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发表时间：
2009-07
影响因子：
6.2
通讯作者：
Han Qingyan;G. Zhengfei;Cheng Gang;Hu Zhifeng
中科院分区：
文献类型：
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作者：
Han Qingyan;G. Zhengfei;Cheng Gang;Hu Zhifeng
利用X射线衍射（XRD）、扫描电镜（SEM）和能谱（EDS）等技术研究了Co-Pt-Pr三元系在1173 K（Pr≤70%）的固相相平衡。1173 K等温截面由15个单相区、24个两相区和10个三相区组成。在1173 K时，Pt在Co_（17）Pr_2、Co_（5 Pr）、Co_（19）Pr_5、Co_（7 Pr）、Co_（3 Pr）和Co_（2 Pr）中的最大固溶度小于1at.% Co在PrPt、Pr 3 Pt 2和Pr 7 Pt 3中的最大固溶度也低于1at.%，而Co在PrPt_5和PrPt_2中的最大溶解度分别为15和7.5at.%，PrPt 2相的均匀性范围约为24.2%~ 31.7at.% Pr在α-（Co，Pt）中的最大溶解度小于1.5at.%。在本工作中，发现在三元系中不存在Pr_3 Pt_4相。没有观察到任何新的三元化合物。
The solid-state phase equilibria in the Co–Pt–Pr ternary system at 1173K (Pr≤70%) were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersion spectroscopy (EDS) techniques. The 1173K isothermal section consists of 15 single-phase regions, 24 two-phase regions and 10 three-phase regions. At 1173K, we have observed that the maximum solid solubility of Pt in Co17Pr2, Co5Pr, Co19Pr5, Co7Pr2, Co3Pr and Co2Pr is below 1at.% and the maximum solid solubility of Co in PrPt, Pr3Pt2and Pr7Pt3is also below 1at.%, but the maximum solubility of Co in PrPt5and PrPt2is 15 and 7.5at.%, respectively, and the homogeneity range for the PrPt2phase is between approximately 24.2% and 31.7at.% Pr; the maximum solubility of Pr in α-(Co, Pt) is below 1.5at.%. In this work, it is found that the phase Pr3Pt4does not exist in the ternary system. No any new ternary compounds were observed.