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Effect of Er doping on glass-forming ability of Co50Cr15Mo14C15B6 alloy

Published online by Cambridge University Press:  01 April 2006

H. Men ,
S.J. Pang  and
T. Zhang
H. Men
Affiliation:
Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, People's Republic of China
S.J. Pang
Affiliation:
Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, People's Republic of China
T. Zhang*
Affiliation:
Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, People's Republic of China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

Bulk glass formation of the Co–Cr–Mo–C–B–Er alloy system was investigated in this paper. The Co50Cr15Mo14C15B6 (at.%) alloy could be cast into fully glassy rod with a diameter up to 2 mm. By adding 2 at.% Er to this alloy, the critical diameter for glass formation reached 10 mm. The excellent glass formability of the Er-doped alloy was mainly attributed to its relatively large reduced glass transition temperature of 0.61, near-eutectic composition, and the necessity of redistribution of the Er atoms for precipitation of crystalline Co6Mo6C phase in the undercooled liquid on cooling.

Keywords

Rapid solidificationScanning electron microscopy (SEM)Second phases
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 4 , April 2006 , pp. 958 - 961
Copyright
Copyright © Materials Research Society 2006

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References

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