Phase Relationship of the CeCo5-SmCo5 Pseudobinary System

The phase relationships of the CeCo 5 -SmCo 5 pseudobinary system have been studied by means of x-ray powder diffraction (XRD), differential thermal analysis (DTA), thermogravimetric measurements (TGM), and scanning electron microscopy equipped with energy dispersive x-ray spectroscopy (SEM–EDS). Th...

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Bibliographic Details
Published in:JOM (1989) 2022-12, Vol.74 (12), p.4710-4715
Main Authors: Xu, Chengfu, Tian, Jinping, Yang, Yongquan, Yao, Qingrong, Ma, Dongdong, Gu, Zhengfei, Rao, Guanghui, Su, Qingyong, Xie, Xionghui, Li, Tianming
Format: Article
Language:English
Subjects:
Alloys
Chemistry/Food Science
Curie temperature
Decomposition
Differential thermal analysis
Earth Sciences
Engineering
Environment
Liquid phases
Parameters
Peritectic reactions
Phase diagrams
Phase relationships
Phase Stability and Transformation of Energy Storage Materials
Phase transitions
Physics
Rare earth elements
Samarium
Samarium base alloys
Scanning electron microscopy
Solid solutions
Spectrum analysis
Temperature
Transition temperature
X ray powder diffraction
X-ray diffraction
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Summary:The phase relationships of the CeCo 5 -SmCo 5 pseudobinary system have been studied by means of x-ray powder diffraction (XRD), differential thermal analysis (DTA), thermogravimetric measurements (TGM), and scanning electron microscopy equipped with energy dispersive x-ray spectroscopy (SEM–EDS). The XRD results show that continuous solid solutions were formed in this CeCo 5 -SmCo 5 pseudobinary system, and all the (Ce, Sm)Co 5 solid solutions belong to a hexagonal structure with space group P6/mmm. With the increase of Sm content x , the lattice parameter, a , and the cell volume, V , of (Ce 1− x Sm x )Co 5 solid solutions increase linearly, but its lattice parameter, c , decreases linearly. The DTA measurements show that the temperature of the peritectic reaction L + (Ce, Sm) 2 Co 17  → (Ce, Sm)Co 5 , the liquid phase transition temperature of the reaction L → L + (Ce, Sm) 2 Co 17 , and the Curie temperature of the (Ce 1− x Sm x )Co 5 alloys increase almost linearly as x increases from 0 to 1.0. Based on the XRD results and DTA data, the tentative vertical section of the CeCo 5 -SmCo 5 pseudobinary phase diagram has been constructed.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-022-05439-1