Hydrogen as a working atmosphere for manufacturing permanent magnets based on rare-earth metals

被引：2
|
作者：
Fedorov, V. V. [1 ]
Bulyk, I. I. [1 ]
Panasyuk, V. V. [1 ]
机构：
[1] Ukrainian Natl Acad Sci, Karpenko Physicomech Inst, Lvov, Ukraine
来源：
MATERIALS SCIENCE | 2009年 / 45卷 / 02期
关键词：
HDDR PROCESS; ND; DISPROPORTIONATION; ALLOYS;
D O I：
10.1007/s11003-009-9185-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The phase compositions and magnetic properties of permanents magnets of the systems Sm - Co and Nd - Fe - B are analyzed. Features of the hydrogenation-disproportionation-desorption-recombination (HDDR) process in the Nd-2 Fe-14 B intermetallic are considered. Using the Dd - Fe - B system as an example, we assess stages of manufacture of commercial permanent magnets and show the prospect of using hydrogen as a working atmosphere for the manufacture of magnetic powder. It is established that the HDDR of Dd - Fe - B alloys leads to their homogenization, grain refinement to a grain size of 0.2 to 0.5 mu m, and an increase in the volume content of the main ferromagnetic phase Dd(2) Fe-14 B. By optimizing such a treatment, we managed to increase the magnetic energy (by 10%) and the lift force (by 25 - 27%) of Dd - Fe - B commercial permanent magnets.
引用
收藏
页码：268 / 278
页数：11
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