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On The Effect of Au Addition and the Role of B on Nanocrystallization of Fe-Zr-B Amorphous Alloy

Published online by Cambridge University Press:  15 February 2011

Y. Zhang ,
N. Wanderka ,
U. Czubayko ,
F. Zhu  and
H. Wollenberger
Y. Zhang
Affiliation:
Hahn-Meitner-Institut Berlin GmbH, Glienickerstr. 100, D-14109 Berlin, Germany Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083, China
N. Wanderka
Affiliation:
Hahn-Meitner-Institut Berlin GmbH, Glienickerstr. 100, D-14109 Berlin, Germany
U. Czubayko
Affiliation:
Hahn-Meitner-Institut Berlin GmbH, Glienickerstr. 100, D-14109 Berlin, Germany
F. Zhu
Affiliation:
Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083, China
H. Wollenberger
Affiliation:
Hahn-Meitner-Institut Berlin GmbH, Glienickerstr. 100, D-14109 Berlin, Germany
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Abstract

Using atom probe field ion microscopy (APFIM) we examined the local chemical compositions of Fe-7Zr-5B-lAu and Fe-14B amorphous alloys in the course of primary crystallization. Au rich clusters are formed during primary crystallization of Fe-7Zr-5B-lAu alloy. However, these clusters do not act as nucleation sites for α-Fe particles. In the early stage of primary crystallization, heterogeneities of Fe and B evolve in the amorphous phase. Heterogeneous distribution of B was found in the as-melt-spun Fe-14B amorphous alloy. During primary crystallization, B is highly supersaturated not only in the nanometer sized α-Fe particles in Fe-7Zr-5B-lAu alloy, but also in those of large diameters in Fe-14B alloy. From the results it is concluded that presence of B lowers the nucleation barrier for primary crystallization.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 580: Symposium E – Nucleation & Growth Processes in Materials , 1999 , 375
Copyright
Copyright © Materials Research Society 2000

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