Improved magnetoimpedance and mechanical properties on nanocrystallization of amorphous Fe68.5Si18.5Cu1Nb3B9 ribbons

被引：5
作者：
Sahoo, Trilochan [1 ,4 ]
Majumdar, B. [2 ]
Srinivas, V. [1 ,3 ]
Srinivas, M. [2 ]
Nath, T. K. [1 ]
Agarwal, G. [5 ]
机构：
[1] Indian Inst Technol, Dept Phys & Meteorol, Kharagpur 721302, W Bengal, India
[2] Def Met Res Lab, Hyderabad 500068, Andhra Pradesh, India
[3] Indian Inst Technol, Dept Phys, Madras 600036, Tamil Nadu, India
[4] Proof & Expt Estab, Balasore 756025, India
[5] Banaras Hindu Univ, Dept Met Engn, Varanasi 221005, Uttar Pradesh, India
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2013年 / 343卷
关键词：
Microstructure; Permeability; Skin depth; Magnetoimpedance; Ductility; GIANT MAGNETO-IMPEDANCE; METALLIC-GLASS; SOFT MAGNETS; ALLOY RIBBON; CU; MICROSTRUCTURE; FERROMAGNETS; COERCIVITY; EMBRITTLEMENT; PERMEABILITY;
D O I：
10.1016/j.jmmm.2013.04.027
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of heat-treatment temperature on evolution of microstructures, mechanical and soft magnetic properties and magnetoimpedance (MI) effect in rapidly solidified Fe68.5Si18.5Cu1Nb3B9 ribbons, has been investigated. The as-quenched ribbons were subjected to heat-treatment at different temperatures between 400 and 600 degrees C for 1 h under high vacuum. Detailed structural studies on the ribbons heat-treated at and above 525 degrees C revealed the presence of nanocrystalline Fe3Si phases embedded in a residual amorphous matrix. The ribbon heat-treated at 550 degrees C temperature exhibits maximum ductility, maximum relative permeability of 4.8 x 10(4), minimum coercivity of 0.1 Oe, and maximum MI value of 62%. The enhanced MI effect is believed to be related to the magnetic softening of 550 degrees C heat-treated ribbons. However, the magnetic properties and MI effect deteriorated in the samples heat-treated above 550 degrees C due to the coarsening of grain sizes. The soft magnetic behavior of the nanocrystalline ribbons are discussed in the light of random anisotropy model, whereas the MI effect is discussed through standard skin effect in electrodynamics. (C) 2013 Elsevier B.V. All rights reserved.
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页码：13 / 20
页数：8
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