Method of Making Chemically Engineered Metastable Alloys and Multiple Components Nanoparticles.
Patent, Filed 28 Jun 96, patented 10 Nov 98,
DEPARTMENT OF THE NAVY WASHINGTON DC
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Nanoparticles of a mixed oxide precursor are reduced to form particles of a nanostructured metastable alloy having a majority metal and a minority metal. Additional heating enriches the surfaces of the particles with respect to the minority metal, thus forming a coating on the particle core. This coating has a higher atomic ratio of minority to majority metal than found in the precursor. The nanostructured metastable alloys may then be oxidized to form nanoparticles having a coating of the oxide of the minority metal and a core of the majority metal or an oxide of the majority metal. The majority metal may be, for example, copper. The minority metal may be, for example, cobalt.
- Properties of Metals and Alloys