Effect of the first hot extrusion temperature on microstructure and magnetic properties of second-extrusion Nd2Fe14B/α-Fe nanocomposite

被引：2

作者：

Jiang, Jufu ^{[1
,2
]}

Wang, Ying ^{[3
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[2] Harbin Inst Technol, Natl Key Lab Precis Hot Proc Met, Harbin 150001, Peoples R China

[3] Harbin Inst Technol, Sch Mechatron Engn, Harbin 150001, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2013年 / 332卷

关键词：

First extrusion; Second extrusion; Density; Microstructure; Magnetic property; FE; DEFORMATION; COERCIVITY; DEPENDENCE; PHASE;

D O I：

10.1016/j.jmmm.2012.11.057

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two hot extrusions were used to fabricate bulk dense permanent magnets of Nd2Fe14B/alpha-Fe nanocomposite. Effect of the first-extrusion temperature on the microstructure and magnetic properties of second-extrusion magnets was investigated. The second-extrusion magnets featured fine-grained microstructure and good surface quality. The first-extrusion temperature had important effect on the density, microstructure and magnetic properties of second-extrusion magnets. The density and grain size of second-extrusion magnets decrease with the increase of the first-extrusion temperature. When the first-extrusion temperature was 950 degrees C, the best magnetic properties, including remanence of 1.02 T, coercivity of 308.5 kA/m and maximum energy product of 94.4 kj/m(3), were achieved in the second-extrusion magnets. The refined microstructure and increased density led to the best magnetic properties of the second-extrusion magnets obtained at the first-extrusion of 950 degrees C as compared to the second-extrusion magnets achieved at other first-extrusion temperatures such as 1000 degrees C, 1050 degrees C and 1100 degrees C. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：76 / 80

页数：5

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