Effect of several heat treatments on the microstructure and coercivity of SMCo5 magnets

被引：17

作者：

de Campos, MF

Okumura, H

Hadjipanayis, GC

Rodrigues, D

Landgraf, FJG

Neiva, AC

Romero, SA

Missell, FP

机构：

[1] Univ Fed Fluminense, EEIMVR, Programa Pos Grad Engn Met, BR-27255125 Volta Redonda, RJ, Brazil

[2] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

[3] Inst Pesquisas Tecnol, BR-05508901 Sao Paulo, Brazil

[4] Univ Sao Paulo, Escola Politecn, Dept Engn Quim, BR-05508 Sao Paulo, Brazil

[5] USP, Inst Fis, BR-05325970 Sao Paulo, Brazil

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2004年 / 368卷 / 1-2期

基金：

巴西圣保罗研究基金会;

关键词：

rare earth compounds; transition metal compounds; permanent magnets; microstructure; TEM;

D O I：

10.1016/S0925-8388(03)00671-6

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：

SmCo5 samples were investigated under the following conditions: 'as-sintered' at 1150degreesC (low coercivity-0.1-0.5 T), heat-treated at 850-880degreesC (coercivity similar to2.5-3.0 T) and after heat treatment at 750degreesC during 25 days (low coercivity-0.1-0.5 T). Transmission electron microscopy investigation showed that the increase of coercivity at 850-880degreesC is not due to second phases precipitated at grain boundaries in the samples nor to the elimination of stacking faults or dislocations. After the heat treatment during 25 days at 750degreesC, no clear evidence of eutectoid decomposition of SmCo5 phase was found, but a slight change of lattice parameters was detected. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：304 / 307

页数：4

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