Identifications of SmCo5 and Smn+1Co5n-1-type phases in 2:17-type Sm-Co-Fe-Cu-Zr permanent magnets

被引：41

作者：

Zhou, Xianglong ^{[1
,2
]}

Song, Xin ^{[1
,2
]}

Jia, Wentao ^{[1
,2
]}

Xiao, Andong ^{[1
,2
]}

Yuan, Tao ^{[1
,2
,3
]}

Ma, Tianyu ^{[1
,2
]}

机构：

[1] Xi An Jiao Tong Univ, Frontier Inst Sci & Technol, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China

[2] Xi An Jiao Tong Univ, MOE Key Lab Nonequilibrium Synth & Modulat Conden, Xian 710049, Peoples R China

[3] Southwest Appl Magnetism Res Inst, Mianyang 621000, Sichuan, Peoples R China

来源：

SCRIPTA MATERIALIA | 2020年 / 182卷

基金：

中国国家自然科学基金;

关键词：

Permanent magnets; Sm-Co alloy; Precipitates; MICROSTRUCTURE; COERCIVITY; EVOLUTION; SM2CO17; ALLOYS;

D O I：

10.1016/j.scriptamat.2020.02.028

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Both SmCo5 and Smn+1Co5n-1-type phases were identified in the Sm25Co42.9Fe23.5Cu5.6Zr3.0 (wt.%) commercial sintered magnet even at the solution-treated state, with the 1:5H cell boundary phase occupying pyramidal planes, the 1:3R (n = 2) thin platelets occupying some basal planes, and the mixture of 1:3R, 2:7R (n = 3) and 5:19R (n = 4) phases distributing at grain boundaries. The mixed Smn+1Co5n-1-type phases at grain boundaries act as primary sinks and lead to sparse 1:5H-precipitates surrounding them after isothermal aging. It clearly reveals that the 1:5H cell boundaries are formed at the early decomposition stage and why they are rare at grain boundaries in the aged magnets. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1 / 5

页数：5

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