Consolidation of hydrogenation-disproportionation-desorption recombination processed Nd-Fe-B magnets by spark plasma sintering

被引：23

作者：

Suresh, K. ^{[1
]}

Ohkubo, T. ^{[1
]}

Takahashi, Y. K. ^{[1
]}

Oh-ishi, K. ^{[1
]}

Gopalan, R. ^{[1
]}

Hono, K. ^{[1
]}

Nishiuchi, T. ^{[2
]}

Nozawa, N. ^{[2
]}

Hirosawa, S. ^{[2
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[2] NEOMAX Co, Hitachi Met, Osaka 6180013, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2009年 / 321卷 / 22期

关键词：

Nd-Fe-B; Permanent magnet; HDDR; Spark plasma sintering; Coercivity; NUCLEATION CONTROLLED MAGNETS; PERMANENT-MAGNETS; MAGNETIZATION REVERSAL; COERCIVITY; MICROSTRUCTURE; POWDERS;

D O I：

10.1016/j.jmmm.2009.07.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have successfully consolidated hydrogenation-disproportionation-desorption-recombination (HDDR) processed Nd-Fe-Co-Zr-B-Ga powder by spark plasma sintering (SPS). The field compacted samples were sintered at different temperatures (T-S) from 550 to 600 degrees C with compressive pressure of 80 MPa for 20 min. Microstructural investigations by transmission electron microscopy indicated that the sintered specimen exhibits Nd2Fe14B grains of similar to 300nm with Nd-rich grain boundary phase. The optimum magnetic properties of B-r: 1.22T, H-c: 928kA/m, H-B(c): 600kA/m, (BH)(max): 210kJ/m(3) were obtained in the sample sintered at 550 degrees C. The strategy for further improving the coercivity and remanence is discussed based on the microstructure-property relationships. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3681 / 3686

页数：6

共 25 条

[1] Fundamental investigations on the spark plasma sintering/synthesis process - I. Effect of dc pulsing on reactivity [J].