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Synthesis and characterization of nanometer-sized Ti-based amorphous powders

Published online by Cambridge University Press:  31 January 2011

J. Jayaraj ,
E. Fleury ,
B.J. Park ,
D.H. Kim  and
W.T. Kim
J. Jayaraj
Affiliation:
Center for Advanced Functional Metals, Korea Institute of Science & Technology, Cheongryang, Seoul 130-650, Korea
E. Fleury*
Affiliation:
Center for Advanced Functional Metals, Korea Institute of Science & Technology, Cheongryang, Seoul 130-650, Korea
B.J. Park
Affiliation:
Department of Metallurgical Engineering, Yonsei University, Seoul 120-749, Korea
D.H. Kim
Affiliation:
Department of Metallurgical Engineering, Yonsei University, Seoul 120-749, Korea
W.T. Kim
Affiliation:
Division of Applied Science, Cheongju University, Cheongju, 360-764, Korea
*
a)Address all correspondence to this author. e-mail: efleury@kist.re.kr
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Abstract

We present a simple method for preparing nanometer-sized, Ti-based amorphous powders from the Y28Ti28Al24Co20and Y36Ti20Al24Co20two-phase amorphous alloys. The initial microstructure of these rapidly quenched alloys is composed of Ti-based, amorphous, spherical, nanometer-sized particles embedded in a Y-based amorphous matrix, with particle size dependent on the alloy composition. The Ti-based powders were extracted from the two-phase amorphous alloys through selective dissolution of the Y-rich matrix in a 0.1 M HNO3solution. The powders of size ranging between 20 and 200 nm have smooth and spherical morphology, and exhibit different magnetic behavior than the bulk alloy of identical composition.

Keywords

AmorphousCorrosionNanoscale
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 6 , June 2007 , pp. 1754 - 1758
Copyright
Copyright © Materials Research Society2007

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References

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