Rapid sintering of anisotropic, nanograined Nd-Fe-B by flash-spark plasma sintering

被引：23
作者：
Castle, Elinor [1 ]
Grasso, Salvatore [1 ]
Reece, Mike [1 ]
Sheridan, Richard [2 ]
Walton, Allan [2 ]
机构：
[1] Queen Mary Univ London, Mile End Rd, London E1 4NS, England
[2] Univ Birmingham, Birmingham B15 2TT, W Midlands, England
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2016年 / 417卷
基金：
欧盟第七框架计划;
关键词：
Magnetic anisotropy; High-speed deformation; Spark plasma sintering; Hard magnetic materials; Flash sintering; DIE-UPSETTING PROCESS; MAGNETIC-PROPERTIES; HOT DEFORMATION; MELT-SPUN; PERMANENT-MAGNETS; BONDED MAGNETS; ELECTRIC-FIELD; MICROSTRUCTURE; POWDERS;
D O I：
10.1016/j.jmmm.2016.05.067
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A Spark Plasma Sintering (SPS) furnace was used to Flash-Sinter (FS) Nd-Fe-Dy-Co-B-Ga melt spun permanent magnetic material. During the 10 s "Flash" process (heating rate 2660 K min(-1)), sample sintering (to theoretical density) and deformation (54% height reduction) occurred. This produced texturing and significant magnetic anisotropy, comparable to conventional die-upset magnets; yet with much greater coercivities (>1600 kA m(-1)) due to the nanoscale characteristics of the plate-like sintered grains. These preliminary results suggest that Flash-SPS could provide a new processing route for the mass production of highly anisotropic, nanocrystalline magnetic materials with high coercivity. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：279 / 283
页数：5
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