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Co- and Fe-based multicomponent bulk metallic glasses designed by cluster line and minor alloying

Published online by Cambridge University Press:  31 January 2011

Q. Wang ,
C.L. Zhu ,
Y.H. Li ,
X. Cheng ,
W.R. Chen ,
J. Wu ,
J.B. Qiang ,
Y.M. Wang  and
C. Dong
Q. Wang
Affiliation:
State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China
C.L. Zhu
Affiliation:
State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China
Y.H. Li
Affiliation:
State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China
X. Cheng
Affiliation:
State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China
W.R. Chen
Affiliation:
Department of Mechanical Engineering, Dalian University, Dalian 116622, China
J. Wu
Affiliation:
State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China
J.B. Qiang
Affiliation:
State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China
Y.M. Wang
Affiliation:
State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China
C. Dong*
Affiliation:
State Key Laboratory of Materials Modification, Dalian University of Technology, Dalian 116024, China; and International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China
*
a)Address all correspondence to this author. e-mail: dong@dlut.edu.cn
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Abstract

Bulk metallic glass (BMG) formations in Co- and Fe-based alloy systems are investigated by using our cluster line approach in combination with minor alloying principle. Basic ternary alloy compositions in Co–B–Si, Fe–B–Y, and Fe–B–Si systems are first determined by cluster lines defined by linking special binary clusters to third elements. Then the basic ternary alloys are further minor alloyed with 3 to 5 at.% Nb to improve glass-forming abilities (GFAs) and ϕ3 mm BMGs are formed in (Co8B3–Si)–Nb and (Fe8B3–Y)–Nb but not in (Fe8B3–Si)–Nb, TM8B3 (TM = Fe, Co) being the most compact binary cluster. The BMGs are expressed approximately with a unified simple composition formula: (TM8B3)1M1, M = (Si, Nb) or (Y, Nb). Finally, mutual Fe and Co substitutions further improve the GFAs as well as the soft magnetic properties, e.g., Is reaching 0.98 T and Hc < 6 A/m for the Co–Fe–B–Si–Nb BMGs. Using the (cluster)1(glue atom)1 model, a new ternary BMG Fe8B3Nb1 is obtained.

Keywords

AmorphousFeCo
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 6 , June 2008 , pp. 1543 - 1550
Copyright
Copyright © Materials Research Society 2008

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