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首页> 外文会议>International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials(ISMANAM 2003); 20030824-20030828; Foz do Lguacu; BR >Mechanical Alloying and Thermal Treatment of the Fe-Co-Ag System
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Mechanical Alloying and Thermal Treatment of the Fe-Co-Ag System

机译：Fe-Co-Ag体系的机械合金化和热处理

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摘要

The phase transformations occurring during the mechanical alloying process of the Fe-Co-Ag system for different Ag compositions keeping the Fe-Co in equiatomic ratio, were investigated. High energy ball milling of mixed elemental powders with nominal composition of (FeCo)_x-Ag_(100-2x) and Fe_x-Co_x-Ag_(100-2x) were studied for different milling periods with the aim to study the phase transformations taking place during the process and also to evaluate the microstructure obtained and the possible miscibility of Ag in the system. Heat treatments of the mechanically alloyed powders were performed and structural characterization of the sintered powders was carried out. The mechanically alloyed powders of the ternary systems showed a good dispersion of Ag into the FeCo grains. However after heat treatment as silver content increases sintering is more effective and higher densification is obtained. Silver acts as the cementing phase between FeCo particles. The final microstructure of the sintered alloys shows FeCo particles surrounded by silver contours.
机译：研究了在Fe-Co-Ag系统的机械合金化过程中，对于不同的Ag组成，使Fe-Co保持等原子比，发生了相变。研究了在不同研磨时间下标称成分为（FeCo）_x-Ag_（100-2x）和Fe_x-Co_x-Ag_（100-2x）的混合元素粉末的高能球磨在此过程中，还评估获得的微结构以及系统中Ag的可能混溶性。进行机械合金化粉末的热处理，并对烧结粉末进行结构表征。三元体系的机械合金化粉末显示出Ag在FeCo晶粒中的良好分散。然而，在热处理之后，随着银含量的增加，烧结更加有效并且获得了更高的致密化。银充当FeCo颗粒之间的胶结相。烧结合金的最终微观结构显示出被银轮廓包围的FeCo颗粒。

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