Effects of Zr on crystallization kinetics of Pr-Fe-B amorphous alloys

被引：0
|
作者：
Liu, JH [1 ]
Li, W [1 ]
Chen, Y [1 ]
Guan, Y [1 ]
机构：
[1] Yanshan Univ, Coll Mat & Chem Engn, Qinhuangdao 066004, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2002年 / 12卷 / 03期
关键词：
Pr-Fe-B amorphous alloys; Zr; crystallization kinetics; activation energy;
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effects of Zr on crystallization kinetics of Pr-Fe-B amorphous alloys have been investigated by DTA and XRD methods. It was found that for Pr8Fe86-xZrxB6(x =0, 1, 2) amorphous alloys, the final crystallized mixture is alpha-Fe and Pr2Fe14B, and the metastable Pr2Fe23B3 Phase occurs during crystallization of Pr8Fe86B6 amorphous alloy, not during crystallization of Pr8Fe86-xZrxB6(x = 1, 2) amorphous alloys. By analyzing the activation energy of crystallization, the formation of an alpha-Fe/Pr2Fe14B composite microstructure with a coarse grain size in annealed Pr8Fe86B6 alloy, is attributed to a difficult nucleation and an easy growth for both the alpha-Fe and Pr2Fe14B in the alloy. The addition of Zr can be used to change the crystallization behavior of the alpha-Fe phase in Pr-Fe-B amorphous alloy, which is helpful to reduce the grain size for the alpha-Fe phase.
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页码：466 / 469
页数：4
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