Peculiarities of the spinodal decomposition and magnetic properties in melt-spun Fe2NiAl alloy during aging

被引：7
作者：
Menushenkov, V. P. [1 ]
Gorshenkov, M. V. [1 ]
Zhukov, D. G. [1 ]
Savchenko, E. S. [1 ]
Zheleznyi, M. V. [1 ]
机构：
[1] Natl Univ Sci & Technol MISIS, Moscow, Russia
来源：
MATERIALS LETTERS | 2015年 / 152卷
关键词：
Alni alloy; Spinodal decomposition; Melt-spinning; Aging; Antiphase domains; Discontinuous precipitates; Modulated microstructure; Coercive force; EARTH PERMANENT-MAGNETS; ALNICO;
D O I：
10.1016/j.matlet.2015.03.056
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A microcrystalline Alni alloy with the nominal composition Fe51.1Ni23.5Al23.7Si1.7 was prepared by meltspinning. Detailed studies of the spinodal decomposition (SD), microstructure and magnetic properties of the ribbons subjected to isothermal aging at T-ag = 500-780 degrees C are reported. TEM investigations of the decomposition of the solid solution (beta(2) -> beta+beta(2)) after melt-spinning and aging have revealed several types of decomposition products. As prepared melt spun ribbons show zone structure and antiphase domain (APD) boundaries inside grains. The APDs were formed during rapid solidification via nucleation and growth mechanism (A(2)-B-2). Aging at 500-600 degrees C led to the coarsening of the zone microstructure and to the appearance of discontinuous precipitates (DP) (beta+beta(2) -> beta ' + beta '(2)) at grain boundaries. Aging at higher than 650 degrees C causes the formation of a modulated microstructure instead of a zone microstructure inside grains and coarsening of DP products. As-prepared ribbons did not reveal hard magnetic properties (H-c=6 Oe). The increase in fic Was observed with increasing aging temperature. The maximum coercivity H-c=250 Oe was obtained for the ribbons aged at 700 degrees C. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：68 / 71
页数：4
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