Evolution from amorphous to nanocrystalline and corresponding magnetic properties of Fe-Si-B-Cu-Nb alloys by melt spinning and spark plasma sintering

被引：30

作者：

Wu, Zhaoyang ^{[1
]}

Fan, Xi'an ^{[1
]}

Li, Guangqiang ^{[1
]}

Gan, Zhanghua ^{[1
]}

Wang, Jian ^{[1
]}

Zhang, Zhan ^{[1
]}

机构：

[1] Wuhan Univ Sci & Technol, Minist Educ, Key Lab Ferrous Met & Resources Utilizat, Wuhan 430081, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2014年 / 187卷

基金：

中国国家自然科学基金;

关键词：

Fe-based nanocrystalline alloys; Magnetic properties; Powder metallurgy; Microstructure; Spark plasma sintering; CRYSTALLIZATION; TA;

D O I：

10.1016/j.mseb.2014.04.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The nanocrystalline Fe-Si-B-Cu-Nb alloys were prepared by firstly melt spinning and then spark plasma sintering process. The microstructure and magnetic properties of the samples obtained were investigated by differential scanning calorimetry, X-ray diffraction, scanning electron microscopy and vibrating sample magnetometer. The body-centered cubic alpha-Fe(Si) phase precipitated from the amorphous matrix when the sintering temperature was increased to 800 K. The Fe23B6 phase started to form at the sintering temperature of 950 K. The grain size and densities of the sintered Fe-Si-B-Cu-Nb alloys increased with increasing the sintering temperature. Moreover, the saturation magnetizations of the samples obtained increased first and then decreased as the sintering temperature was increased from 750 K to 1050 K, while the values of coercive force changed in the opposite direction. The Fe-Si-B-Cu-Nb alloys sintered at 900 K exhibited a nanocrystalline structure with a grain size of similar to 34 nm. It also displayed excellent soft magnetic properties with saturation magnetization at 137.5 emu/g, coercivity at 5 Oe and remanence at 1.0 emu/g. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：61 / 66

页数：6

共 41 条

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