Improved temperature and corrosion behaviour of nanocomposite Nd2(Fe,Co,M)14B/α-Fe magnets

被引：20
|
作者：
Jurczyk, M [1 ]
Jakubowicz, J [1 ]
机构：
[1] Poznan Univ Technol, Inst Mat Sci & Engn, PL-60965 Poznan, Poland
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 311卷 / 02期
关键词：
rare earth compounds; transition metal compounds; permanent magnets; nanostructures; powder metallurgy;
D O I：
10.1016/S0925-8388(00)01114-2
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The characteristics of the magnetic properties nanocomposite Nd-2(Fe,Co,M)(14)B/alpha-Fe magnets obtained by high energy ball milling and powder metallurgy routes have been improved by appropriate Al-Cr, Cr, Zr additions. Using a single phase close to the stoichiometric composition, nanocomposite Nd-12.6(Fe,Co,M)(81.4)B-6/alpha-Fe magnets with better temperature stability are produced, due to the disappearance of the Nd-rich grain boundary phase in Nd-2(Fe,Co)(14)B/alpha-Fe materials, If the content of the soft magnetic alpha-Fe phase in Nd-2(Fe,Co,M)(14)B/alpha-Fe composities increases, the thermal stability of the coercivity increases, too. For a Nd12.6Fe69.3Co11.6Zr0.5B6/alpha-Fe magnet, containing 37.5 vol% alpha-Fe, the temperature coefficients (from 293 to 413 K) of remanence alpha(J(r)) and coercivity beta(H-j(c)) are: = 0.07 and - 0.35% K-1, respectively. Nanocomposite magnets appears to he more corrosion resistant than sintered Nd-Fe-B magnets. (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：292 / 298
页数：7
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