摘要
采用高能行星球磨的方法研究了原子配比3：1的Fe、Si混合粉末的机械合金化过程。用XRD、TEM、SEM及EPMA对球磨不同时间粉末的结构、组织、形貌、截面进行了分析。结果表明：Fe75Si25混合粉末在球磨的过程中出现两种形态变化，一种是Fe与Si形成层状形态，另一种为Si及Fe—Si合金包覆Fe形成包覆形态；球磨至30h，合金化基本完成；球磨产物为α—Fe（Si）固溶体，颗粒粒径约为1～20μm。利用一个简单的模型来对Fe75Si25混合粉末合金化过程进行了描述。
The process of mechanical alloying of mixed iron-silicon （Fe： Si = 3：1 ） powders was studied with a high energy planetary ball milling. The phases, microstructures, morphologies, cross-sections of mechanical alloying powders were analyzed by XRD, TEM, SEM and EPMA. Two kinds of Fe-Si powders were obtained in the process, one was a composite powder with a typical laminar structural, and the other was a powder with iron as the inner which was coated by Si and Fe-Si allys. After milling for 30h, it was found that nanocrystal line α-Fe （Si） solid solution （bcc） was formed, and the particle size was about 1 - 20μm. A simple model was used to describe the mechanical alloying process of Fe75Si25 mixture.
出处
《粉末冶金技术》
EI
CAS
CSCD
北大核心
2006年第6期407-411,共5页
Powder Metallurgy Technology
基金
武汉市青年科技晨光计划资助项目(20035002016-11)
