Structure and properties of nanocrystalline nickel prepared by selective leaching at different temperatures

0477152 - FZÚ 2018 RIV US eng J - Journal Article
Michalcová, A. - Marek, I. - Len, A. - Heczko, Oleg - Drahokoupil, Jan - Vojtěch, D. - Huber, Š. - Nováková, R.
Structure and properties of nanocrystalline nickel prepared by selective leaching at different temperatures.
Pure and Applied Chemistry. Roč. 89, č. 4 (2017), s. 545-552. ISSN 0033-4545. E-ISSN 1365-3075
R&D Projects: GA ČR GBP108/12/G043
Institutional support: RVO:68378271
Keywords : magnetic properties * magnetization * nanocrystals * neutron scattering * nickel * SANS * SSC-2016 * X-ray diffraction
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 5.294, year: 2017

Nanocrystalline nickel is an interesting material for catalysis, and also, like all nanocrystalline metals, it has potential for structural application. Our aim was to develop a method for preparation of precursor materials for powder metallurgy. Because of this, selective leaching of binary alloy was chosen as it leads to production of nanocrystalline clustered (sub) micro particles. In this work, the preparation of Ni particles by selective leaching of Al matrix from Al-50 wt.% Ni in NaOH water solution is described. It was found that structure and magnetic properties were strongly dependent on leaching temperature, which was proven by characterization of Ni particles leached at 20, 0, 20, 40, 60 and 80 degrees C. The microstructure of as-prepared particles was observed by HRTEM and also by small angle neutron scattering. Magnetic properties were characterized by measuring of saturation magnetization.
Permanent Link: http://hdl.handle.net/11104/0273527