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Structure and magnetic properties of nickel nanoparticles preparedby selective leaching
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SYSNO ASEP 0454540 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Structure and magnetic properties of nickel nanoparticles preparedby selective leaching Author(s) Michalcová, A. (CZ)
Svobodová, P. (CZ)
Nováková, R. (CZ)
Len, A. (HU)
Heczko, Oleg (FZU-D) RID, ORCID
Vojtěch, D. (CZ)
Marek, I. (CZ)
Novák, P. (CZ)Source Title Materials Letters. - : ELSEVIER SCIENCE BV - ISSN 0167-577X
Roč. 137, Dec (2014), s. 221-224Number of pages 4 s. Language eng - English Country NL - Netherlands Keywords nanoparticles ; magnetic materials ; metals and alloys ; route ; size Subject RIV JG - Metallurgy R&D Projects GA14-03044S GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000345469700060 EID SCOPUS 84907509719 DOI 10.1016/j.matlet.2014.09.012 Annotation 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. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2016
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