Experimental Determination of Phase Equilibria in the Ce-Co-Zr Ternary System
Experimental Determination of Phase Equilibria in the Ce-Co-Zr Ternary System
复制标题
DOI：
10.1007/s11669-023-01045-z
复制
发表时间：
2023-04
影响因子：
1.4
通讯作者：
X. P. Zheng;X. Liu;S. Y. Yang;J. Wang;Q. Yao;Y. S. Du;L. G. Zhang;G. Rao;H. Y. Zhou
中科院分区：
文献类型：
--
作者：
X. P. Zheng;X. Liu;S. Y. Yang;J. Wang;Q. Yao;Y. S. Du;L. G. Zhang;G. Rao;H. Y. Zhou
采用平衡合金法，结合扫描电子显微镜、X射线能谱仪和X射线衍射仪，首次测定了Ce-Co-Ti三元系在873 K和1,073 K下的相平衡。在873 K和1，073 K下检测到具有ThMn 12型结构的三元金属间化合物CeCo 12-xTi x的存在。CeCo_（12-x）Ti_x的组成范围为7.8- 14.6at.% Ti（873 K和8.4-14.8原子%）Ti在1，073 K时的热稳定性。由于Ti部分取代Co，具有TbCu 7型结构的亚稳二元金属间化合物CeCo 7被证实在873 K是稳定的，并且Ti在CeCo 7中的固溶度被确定为3.3 at.%。实验结果表明，Ti在Ce 2Co 17（rt）、CeCo 5、Ce 5Co 19、Ce 2Co 7（ht）、CeCo 3和CeCo 2中的最大固溶度为6.0at.%，1.4 at.%，1.3 at.%，4.1 at.%，1.2原子百分比和2.2原子%，而Co 3 Ti、Co2 Ti（c）和CoTi的组成范围为75.2-82.0原子%钴，66.0-67.5原子% Co和48.5- 53.8at.%同时，在1，073 K下测得Ti在Ce 2Co 17（rt）、CeCo 5、Ce 5Co 19、Ce 2Co 7（ht）、CeCo 3和CeCo 2中的最大固溶度为5.3at.%，2.8 at.%，0.5 at.%，2.8 at.%，0.9 at.%，和2.5原子%，而Co 3 Ti、Co2 Ti（c）和CoTi的组成范围为74- 79.7at.% Co，65.6-68.5原子% Co和51.4- 53.5at.%最后，建立了Ce-Co-Ti三元系在873 K和1,073 K的等温截面。
The phase equilibria of the Ce–Co–Ti ternary system at 873 K and 1,073 K were determined for the first time by using the equilibrium alloy method in combination with scanning electron microscopy with energy dispersive X-ray spectroscopy and X-ray diffraction. The ternary intermetallic compound CeCo12-xTixwith a ThMn12-type structure was detected to exist at 873 K and 1,073 K. The composition range of CeCo12-xTixwas measured to 7.8–14.6 at.% Ti at 873 K and 8.4–14.8 at.% Ti at 1,073 K, respectively. Due to the partial substitution of Co by Ti, the metastable binary intermetallic compound CeCo7with a TbCu7-type structure was confirmed to be stable at 873 K, and the solid solubility of Ti in CeCo7was determined to be 3.3 at.%. The experimental results show that the maximum solid solubility of Ti in Ce2Co17(rt), CeCo5, Ce5Co19, Ce2Co7(ht), CeCo3, and CeCo2at 873 K is 6.0 at.%, 1.4 at.%, 1.3 at.%, 4.1 at.%, 1.2 at.% and 2.2 at.%, respectively, while the composition ranges of Co3Ti, Co2Ti(c), and CoTi are 75.2–82.0 at.% Co, 66.0–67.5 at.% Co and 48.5–53.8 at.% Co. Meanwhile, the maximum solid solubility of Ti in Ce2Co17(rt), CeCo5, Ce5Co19, Ce2Co7(ht), CeCo3, and CeCo2at 1,073 K was measured to be 5.3 at.%, 2.8 at.%, 0.5 at.%, 2.8 at.%, 0.9 at.%, and 2.5 at.%, respectively, while the composition ranges of Co3Ti, Co2Ti(c), and CoTi are 74–79.7 at.% Co, 65.6–68.5 at.% Co and 51.4–53.5 at.% Co. Finally, two isothermal sections of the Ce–Co–Ti ternary system at 873 K and 1,073 K were established.