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Microstructure and wear resistance of Cuss-toughened Cr5Si3/CrSi metal silicide alloys

Published online by Cambridge University Press:  03 March 2011

Y.X. Yin  and
H.M. Wang
Y.X. Yin
Affiliation:
Laboratory of Laser Materials Processing and Surface Engineering, School of Materials Science and Engineering, Beihang University (formerly Beijing University of Aeronautics and Astronautics), Beijing 100083, People's Republic of China
H.M. Wang*
Affiliation:
Laboratory of Laser Materials Processing and Surface Engineering, School of Materials Science and Engineering, Beihang University (formerly Beijing University of Aeronautics and Astronautics), Beijing 100083, People's Republic of China
*
a)Address all correspondence to this author. e-mail: wanghuaming@263.net
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Abstract

Wear-resistant Cu-based solid-solution-toughened Cr5Si3/CrSi metal silicide alloy with a microstructure consisting of predominantly the dual-phase primary dendrites with a Cr5Si3 core encapsulated by CrSi phase and a small amount of interdendritic Cu-based solid solution (Cuss) was designed and fabricated by the laser melting process using Cr–Si–Cu elemental powder blends as the precursor materials. The microstructure of the Cuss-toughened Cr5Si3/CrSi metal silicide alloy was characterized by optical microscopy, powder x-ray diffraction, and energy dispersive spectroscopy. The Cuss-toughened silicide alloys have excellent wear resistance and low coefficient of friction under room temperature dry sliding wear test conditions with hardened 0.45% C carbon steel as the sliding–mating counterpart.

Keywords

Intermetallic alloysMicrostructureTribology
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 5 , May 2005 , pp. 1122 - 1130
Copyright
Copyright © Materials Research Society 2005

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