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Characterization of Fe–Ni(C) nanocapsules synthesized by arc discharge in methane

Published online by Cambridge University Press:  31 January 2011

X. L. Dong ,
Z. D. Zhang ,
S. R. Jin ,
W. M. Sun ,
X. G. Zhao ,
Z. J. Li  and
Y. C. Chuang
X. L. Dong
Affiliation:
Institute of Metal Research, Academia Sinica, Wenhua Road 72, Shenyang, 110015, People's Republic of China and Laboratory of Ultrafine Particles, Shenyang Polytechnic University, Xinghua South Street 58, Shenyang, 110023, People's Republic of China
Z. D. Zhang
Affiliation:
Institute of Metal Research, Academia Sinica, Wenhua Road 72, Shenyang, 110015, People's Republic of China and International Center for Materials Physics, Academia Sinica, 110015, Shenyang, People's Republic of China
S. R. Jin
Affiliation:
Laboratory of Ultrafine Particles, Shenyang Polytechnic University, Xinghua South Street 58, Shenyang, 110023, People's Republic of China
W. M. Sun
Affiliation:
Laboratory of Ultrafine Particles, Shenyang Polytechnic University, Xinghua South Street 58, Shenyang, 110023, People's Republic of China
X. G. Zhao
Affiliation:
Institute of Metal Research, Academia Sinica, Wenhua Road 72, Shenyang, 110015, People's Republic of China
Z. J. Li
Affiliation:
Laboratory of Ultrafine Particles, Shenyang Polytechnic University, Xinghua South Street 58, Shenyang, 110023, People's Republic of China
Y. C. Chuang
Affiliation:
Institute of Metal Research, Academia Sinica, Wenhua Road 72, Shenyang, 110015, People's Republic of China
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Abstract

Ultrafine Fe–Ni(C) particles of various compositions were prepared by arc discharge synthesis in a methane atmosphere. The particles were characterized by x-ray diffraction, transmission electron microscopy, energy disperse spectroscopy, chemical analysis, x-ray photoelectron spectroscopy, Mössbauer spectroscopy, and magnetization measurement. The carbon atoms solubilizing at interstitial sites in γ–(Fe, Ni, C) solution particles have the effects of forming austenite structure and changing microstructures as well as magnetic properties. A carbon layer covers the surface of Fe–Ni(C) particles to form the nanocapsules and protect them from oxidization. The mechanism of forming Fe–Ni(C) nanocapsules in the methane atmosphere was analyzed.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 5 , May 1999 , pp. 1782 - 1790
Copyright
Copyright © Materials Research Society 1999

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