On the effect of Au addition and the role of B on nanocrystallization of Fe-Zr-B amorphous alloy

被引：0
|
作者：
Zhang, Y [1 ]
Wanderka, N [1 ]
Czubayko, U [1 ]
Zhu, F [1 ]
Wollenberger, H [1 ]
机构：
[1] Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany
来源：
NUCLEATION AND GROWTH PROCESSES IN MATERIALS | 2000年 / 580卷
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中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Using atom probe field ion microscopy (APFIM) we examined the local chemical compositions of Fe-7Zr-5B-1Au and Fe-14B amorphous alloys in the course of primary crystallization. Au rich clusters are formed during primary crystallization of Fe-7Zr-5B-1Au alloy. However, these clusters do not act as nucleation sites for alpha -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 alpha -Fe particles in Fe-7Zr-5B-1Au 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.
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页码：375 / +
页数：4
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