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Thermal Plasma Synthesis of Fe-Co Alloy Nanoparticles

Published online by Cambridge University Press:  10 February 2011

John Henry J. Scott ,
Zafer Turgut ,
Krishna Chowdary ,
Michael E. Mchenry  and
Sara A. Majetich
John Henry J. Scott
Affiliation:
National Institute of Standards and Technology (NIST), Gaithersburg, MD 20899.
Zafer Turgut
Affiliation:
Department of Materials Science and Engineering
Krishna Chowdary
Affiliation:
Department of Physics, Carnegie Mellon University, Pittsburgh, PA, 15213.
Michael E. Mchenry
Affiliation:
Department of Materials Science and Engineering
Sara A. Majetich
Affiliation:
Department of Physics, Carnegie Mellon University, Pittsburgh, PA, 15213.
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Abstract

FeCo nanoparticles are synthesized in a radio frequency (RF) plasma torch from metal powder precursors and simple gases. The first precursor consists of pre-alloyed FeCo powder; the second precursor is a mixture of elemental Fe and Co powders. A protective carbon coating on the particles is achieved by injection of acetylene gas into the plasma. X-ray diffraction reveals phase purity, low carbon concentration, and minimal oxidation. Analytical electron microscopy is used to examine the nanocomposite morphology and composition of individual nanoparticles. Both synthesis routes produce alloy product, but nanoparticles produced from pre-alloyed precursors exhibit smaller variations in Fe/Co ratio than particles produced from elemental powders.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 501: Symposium FF – Surface Controlled Nanoscale Materials for High-Added… , 1997 , 121
Copyright
Copyright © Materials Research Society 1998

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References

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