Synthesis and characterization of nanoparticles of Alnico alloys

Nanoparticles of Alnico 4 (Fe–12% Al–28% Ni–5% Co) and Alnico 5 (Fe–8% Al–14% Ni–24% Co–3%–Cu) alloys with the mean particle diameter from 12 to 34 nm were successfully produced by hydrogen plasma metal reaction. The particle features, oxidization behavior and magnetic properties were studied. The n...

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Bibliographic Details
Published in:Acta materialia 2003-10, Vol.51 (18), p.5593-5600
Main Authors: Li, Xingguo, Chiba, Akihiko, Sato, Masayosi, Takahashi, Seiki
Format: Article
Language:English
Subjects:
Alnico alloy
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Magnetic properties
Materials science
Metals. Metallurgy
Morphology
Nanoparticles
Nanoscale materials and structures: fabrication and characterization
Oxidation
Physics
Plasma
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Summary:Nanoparticles of Alnico 4 (Fe–12% Al–28% Ni–5% Co) and Alnico 5 (Fe–8% Al–14% Ni–24% Co–3%–Cu) alloys with the mean particle diameter from 12 to 34 nm were successfully produced by hydrogen plasma metal reaction. The particle features, oxidization behavior and magnetic properties were studied. The nanoparticles have the same crystalline structure and lattice parameter as the master alloys, and a new phase or non-equilibrium phase has not been observed. With an increase in the mean particle, the oxidization temperature and the saturation magnetization are decreased, but the coercive force is enhanced.
ISSN:1359-6454
1873-2453
DOI:10.1016/S1359-6454(03)00423-3