High-performance α-Fe/Pr2Fe14B-type nanocomposite magnets produced by hot compaction under high pressure

被引：34

作者：

Wang, ZC ^{[1
]}

Zhou, SZ ^{[1
]}

Zhang, MC ^{[1
]}

Qiao, Y ^{[1
]}

机构：

[1] Beijing Univ Sci & Technol, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2000年 / 88卷 / 01期

关键词：

D O I：

10.1063/1.373701

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The alpha-Fe/R2Fe14B-type nanocomposite magnets have been prepared by hot pressing melt spun Pr8Dy1Fe74.5Co10Nb0.5B6 flakes under a conventional pressure P of 125 MPa and high pressures ranging from 1 to 7 GPa. It was found that increasing compaction pressure from 125 MPa to 5 GPa led to marked grain refinement in the magnet and consequently resulted in significant improvement of magnetic properties. When hot pressing under even higher pressure (P > 5 GPa), however, the crystallization was constrained and the hot pressed magnets retained a certain amount of amorphous phase besides the Pr2Fe14B-type phase and alpha-(FeCo) phase, which resulted in the deterioration of the magnetic properties. A remanence of 11.1 kG, coercivity of 10.2 kOe, and maximum energy product of 23.6 MGOe have been achieved in the magnet hot pressed under a pressure of 5 GPa. (C) 2000 American Institute of Physics. [S0021-8979(00)02513-5].

引用

页码：591 / 593

页数：3

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