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Development of quaternary Fe–B–Y–Nb bulk glassy alloys with high glass-forming ability

Published online by Cambridge University Press:  03 March 2011

Dong Ho Kim ,
Jin Man Park ,
Do Hyang Kim  and
Won Tae Kim
Dong Ho Kim
Affiliation:
Center for Non-crystalline Materials, Department of Metallurgical Engineering, Yonsei University, Seodaemun-gu, Seoul 120-749, Korea
Jin Man Park
Affiliation:
Center for Non-crystalline Materials, Department of Metallurgical Engineering, Yonsei University, Seodaemun-gu, Seoul 120-749, Korea
Do Hyang Kim*
Affiliation:
Center for Non-crystalline Materials, Department of Metallurgical Engineering, Yonsei University, Seodaemun-gu, Seoul 120-749, Korea
Won Tae Kim
Affiliation:
Applied Science Division, Chongju University, Chongju 360-764, Korea
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

The effects of niobium (Nb) addition on the glass-forming ability (GFA), crystallization behavior, and compressive mechanical property of iron (Fe)–boron (B)–yttrium (Y) alloys have been investigated. Among the (Fe71.2B24Y4.8)100−xNbx (x = 0, 2, 4, 6, 8) alloys investigated, (Fe71.2B24Y4.8)96Nb4 exhibits the highest GFA, enabling the formation of glassy rods with a maximum diameter of 7 mm, which is the largest among quaternary Fe-based alloys. The comparison of the crystallization behavior of the alloys shows that the formation of metastable Fe23B6 phase during crystallization in the (Fe71.2B24Y4.8)96Nb4 alloy can suppress the formation of other stable crystalline phases such as α-Fe, enhancing the stability of the glass phase. The present results show that the attainment of a significantly high GFA is possible even in a quaternary Fe-based alloy system by properly tailoring the competing crystalline phase by the modification of liquid chemistry.

Keywords

AlloyAmorphousFe
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 2 , September 2006 , pp. 471 - 477
Copyright
Copyright © Materials Research Society 2007

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