Influence of Fe2O3 on alloying and magnetic properties of Fe-Al

被引：4

作者：

Jiraskova, Y. ^{[1
]}

Bursik, J. ^{[1
]}

Zivotsky, O. ^{[2
,3
]}

Cuda, J. ^{[4
]}

机构：

[1] Acad Sci Czech Republic, Inst Phys Mat, Brno, Czech Republic

[2] Tech Univ Ostrava, VSB, Dept Phys, Ostrava, Czech Republic

[3] Tech Univ Ostrava, VSB, Reg Mat Sci & Technol Ctr, Ostrava, Czech Republic

[4] Palacky Univ Olomouc, Reg Ctr Adv Technol, Olomouc, Czech Republic

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2014年 / 186卷

关键词：

Fe-Al alloy; Mechanical alloying; Microstructure; Intergrain interaction; Magnetic properties; FE3AL-AL2O3; NANOCOMPOSITE; MOSSBAUER; POWDER; MICROSTRUCTURE; SUBSTITUTION; ALUMINUM;

D O I：

10.1016/j.mseb.2014.03.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present study is devoted to changes of the magnetic properties during the high-energy ball milling of the Fe, Al and Fe2O3 powders. The magnetic properties are supported by the structure morphology, phase composition, and changes in atomic ordering investigated using the structure sensitive scanning electron microscopy, X-ray diffraction and Mossbauer spectrometry. Intergrain exchange coupling results in negative values of delta M(H) Henkel graphs yielding dipolar interactions among particles and only slightly depending on the milling time. The bcc-Fe Al is detected after 2 h of milling coexisting with the alpha-(Fe,Al)(2)O-3, superparamagnetic oxides, and alpha-Fe. In the next milling steps the changes in the phase composition are seen. While a small amount of the superparamagnetic oxides and the bcc-Fe Al phase are detected after 20h, the alpha-(Fe,Al)(2)O-3 has been dissolved. An increase in the hyperfine induction and saturation magnetization evidences a decrease in Al content in the bcc-Fe Al estimated to be bellow 18 at.% Al. (c) 2014 Elsevier B.V. All rights reserved.

引用

页码：73 / 78

页数：6

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