Experimental Investigation of the Isothermal Section at 800 °C of the Nd-Fe-Co Ternary System

被引：6
|
作者：
Bouchaala, N. [1 ,2 ]
Jemmali, M. [2 ,3 ]
Nouri, K. [1 ,2 ]
Walha, S. [2 ]
Ben Salah, A. [2 ]
Bessais, L. [1 ]
机构：
[1] Univ Paris Est, ICMPE, UMR7182, CNRS,UPEC, 2-8 Rue Henri Dunant,BP 28, F-94320 Thiais, France
[2] Univ Sfax Tunisia, Fac Sci Sfax, Lab Sci Mat & Environm, Sfax, Tunisia
[3] Qassim Univ, Dept Chem, Coll Sci & Arts Ar Rass, POB 53, Buraydah, Saudi Arabia
来源：
JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION | 2017年 / 38卷 / 04期
关键词：
alloys; binary system; intermetallic compound; solid solution; ternary phase diagram; x-ray analysis; MAGNETIC-PROPERTIES; PHASE-RELATIONS;
D O I：
10.1007/s11669-017-0552-9
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The phase equilibrium of the ternary Nd-Fe-Co system at 800 degrees C was investigated by means of powder x-ray diffraction and scanning electron microscopy-energy dispersive x-ray spectroscopy. Seven binary compounds, i.e., Nd2Co17, NdCo5, Nd5Co19, Nd2Co7, NdCo3, NdCo2, Nd2Fe17 were identified to exist at this isothermal section. This isothermal section consists of ten single-phase, ten two-phase and six three-phase regions. All measured compositions and unit-cell refinements were performed at room temperature from quenched samples annealed at 800 degrees C for one week. The maximum solubility at 800 degrees C of Fe in NdCo2-xFex (MgCu2-type structure, Fd-3 m), NdCo3-xFex (PuNi3-type structure, R-3 m space group), Nd2Co7-xFex (Ce2Ni7-type structure, R-3 m), Nd5Co19-x Fex (CeCo19-type structure, R-3 m space group), NdCo5-xFex (CaCu5-type structure, P6/ mmm), Nd-2 Co17-xFex (Th2Zn17 type structure, R-3 m) and Nd-2 Fe17-xCox (Th2Zn17 type structure, R-3 m) are about 31.6 at.% Fe, 47.9 at.% Fe, 13.3 at.% Fe, 8.6 at.% Fe, 10.37 at.%, 36.35 at.% Fe, and 58.23 at.% Fe respectively. The solid solubility range of Co in Nd2Fe17 form discontinuous series of 2 ranges is about 0-30.14 at.% Co, and 51.9-100 at.% Co and the solid solubility range of Fe in Nd2Co17 is about 0-48.1 at.% Fe, and 69.86-100 at.% Fe.
引用
收藏
页码：561 / 567
页数：7
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