Structure and magnetic properties of nickel nanoparticles prepared by selective leaching

被引：12

作者：

Michalcova, Alena ^{[1
]}

Svobodova, Petra ^{[1
]}

Novakova, Radka ^{[1
]}

Len, Adel ^{[2
]}

Heczko, Oleg ^{[3
]}

Vojtech, Dalibor ^{[1
]}

Marek, Ivo ^{[1
]}

Novak, Pavel ^{[1
]}

机构：

[1] Inst Chem Technol, Dept Met & Corros Engn, CR-16628 Prague 6, Czech Republic

[2] Hungarian Acad Sci, Budapest Nucl Ctr, Wigner Res Ctr Phys, Assoc KFKI Res Inst Ctr Energy Res, H-1525 Budapest 114, Hungary

[3] Inst Phys ASCR, Vvi, Prague 18221, Czech Republic

来源：

MATERIALS LETTERS | 2014年 / 137卷

关键词：

Nanoparticles; Magnetic materials; Metals and alloys; ROUTE; SIZE;

D O I：

10.1016/j.matlet.2014.09.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, we propose a novel method for preparation of nanocrystalline powder precursors for powder metallurgy processing. Nickel nanocrystalline powders were prepared by selective leaching of the Al-20Ni alloys in NaOH solution. The powders were studied by SEM, TEM, XRD, magnetometry and by small angle neutron scattering. The prepared powders had internal structure formed by grains of 5-50 nm in size depending on the leaching temperature. It was also proven that slight grain coarsening occurred during heating of particles at 40-80 degrees C for one hour. Magnetometry testing revealed significantly reduced magnetization of nanocrystalline nickel which is related to the internal structure. The results indicate that nickel powders prepared by selective leaching are suitable precursor for powder metallurgical preparation of bulk products with interesting physical and possible also mechanical properties. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：221 / 224

页数：4

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