Preparation of Sm2Fe17 alloy and induced mechanism by calciothermic reduction

被引：4

作者：

Liu, Donghui ^{[1
]}

Lan, Qiaofa ^{[1
,3
]}

Xie, Ziyu ^{[1
]}

Meng, Yuning ^{[1
]}

Zhang, Xiaolin ^{[1
]}

Niu, Fei ^{[1
,2
]}

Yang, Youming ^{[1
,2
,3
]}

机构：

[1] Jiangxi Univ Sci & Technol, Fac Mat Met & Chem, Ganzhou 341000, Peoples R China

[2] Jiangxi Univ Sci & Technol, Jiangxi Prov Key Lab Flash Green Dev & Recycling, Ganzhou 341000, Peoples R China

[3] Natl Engn Res Ctr Ion Rare Earth, Ganzhou 341000, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2021年 / 274卷

关键词：

SmF3; Sm2Fe17; Calciothermic reduction; Microstructure; Induced mechanism; EARTH INTERMETALLIC COMPOUNDS; MAGNETIC-PROPERTIES; HIGH COERCIVITY; SM; FE; METALS; POWDER; MELT; NI; ELECTRODEPOSITION;

D O I：

10.1016/j.mseb.2021.115447

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

SmF3 cannot be directly reduced to metallic samarium by calcium. In this work, we presented the thermodynamic calculation and preperation of Sm2Fe17 alloy by calciothermic reduction. The composition, crystal structure, elements distribution, chemical valence and induced mechanism of Sm2Fe17 alloy were analyzed and characterized by ICP, XRD, SEM, EDS and XPS. The results show that the feasibility of preparing Sm2Fe17 alloy by iron-induced SmF3 calciothermic reduction. The Sm and Fe component of SmFe alloy approximates the nominal composition of Sm2Fe17 alloy with 10% excess of SmF3 over the stoichiometry. The micrograph of the SmFe ingot exhibits fish-bone-like morphology and is composed of alpha-Fe, Sm2Fe17 and SmFe3 phases. The Sm and Fe elements of the samples demonstrate zero valency. Electrons from metallic Sm are drawn toward to the orbits of Fe and an Sm-Fe bond with ionic bond property is formed and being reduced by calcium to obtain Sm2Fe17 alloy.

引用

页数：8

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