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
收藏
页码：3681 / 3686
页数：6
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