Mechanical alloying of the Fe-Pb system immiscible in the equilibrium state

被引：11
|
作者：
Dorofeev, G. A. [1 ]
Elsukov, E. P. [1 ]
机构：
[1] Russian Acad Sci, Physicotech Inst, Ural Div, Izhevsk 426001, Russia
来源：
PHYSICS OF METALS AND METALLOGRAPHY | 2007年 / 103卷 / 06期
关键词：
D O I：
10.1134/S0031918X07060087
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
X-ray diffraction and Mossbauer spectroscopy were used to study the mechanical alloying of the Fe-Pb system, which is immiscible under equilibrium conditions, in a planetary ball mill by the example of an Fe(95) Pb(5) composition. The formation of a supersaturated bcc solid solution of Pb in alpha-Fe with a limiting concentration of 1.7 at. % Pb has been established. The most fraction of Pb in the mechanically alloyed samples was present as segregates at the boundaries of the nanocrystalline bcc phase. No dissolution of iron in lead has been observed. The mechanism of formation of the supersaturated solid solution includes sequential stages of the formation of a nanostructure in alpha-Fe, penetration of Pb along alpha-Fe grain boundaries and its segregation at the boundaries, and the saturation of alpha-Fe with lead.
引用
收藏
页码：593 / 599
页数：7
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