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Effect of Boron on Crystallization Process, Forming Ability and Magnetic Properties of Amorphous Fe91−xZr5BxNb4 Alloy

Published online by Cambridge University Press:  17 March 2011

B. Yao ,
X. Hu ,
L Si ,
H Tan  and
Y. Li
B. Yao
Affiliation:
Department of Material Science, Faculty of Science, National University of Singapore, 119260, Singapore
X. Hu
Affiliation:
Department of Material Science, Faculty of Science, National University of Singapore, 119260, Singapore
L Si
Affiliation:
Department of Material Science, Faculty of Science, National University of Singapore, 119260, Singapore
H Tan
Affiliation:
Department of Material Science, Faculty of Science, National University of Singapore, 119260, Singapore
Y. Li*
Affiliation:
Department of Material Science, Faculty of Science, National University of Singapore, 119260, Singapore
*
*Corresponding author: masliy@nus.edu.sg
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Abstract

Effects of boron (B) on crystallization, glass forming ability (GFA) and magnetic properties of amorphous Fe91−xZr5BxNb4 (FZBN) were studied in the B content ranging from 0 to 36 at%. The amorphous FZBN crystallizes to μ-Fe in primary crystallization mode at B≤ 20 at% and to Fe-Zr-B-Nb cubic phase with lattice constant of 1.0704 nm and μFe in eutectic mode in the range from 22 at% to 30 at% B. The change of crystallization mode is accompanied by the sharp enhance of glass transition and crystallization temperatures. The GFA of FZBN alloys changes with B content and reaches the largest near 27.5 at % B. Curie temperature (Tc) and magnetization at room-temperature (MRT) and 78K (M78K) for the amorphous FZBN increase with increasing B content. However, the change laws of the Tc and the magnetizations are somewhat different in the composition ranges of 5 to 20 at% B and 22.5 at% to 30 at% B.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 644: Symposium L – Supercooled Liquid, Bulk Glassy and Nanocrystalline State of Alloys , 2000 , L7.3
Copyright
Copyright © Materials Research Society 2001

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