中文摘要：

利用高能球磨,通过剧烈的塑性变形,使Fe、Al粉末颗粒发生细化和机械合金化,并产生高的畸变能和界面能,在560℃和620℃进行低温烧结,Fe、Al原子沿着大量的晶界和缺陷进行扩散,形成FeAl合金相。经过12h的高能球磨,620℃烧结、保温4h,可以使Fe、Al复合粉完全转变成FeAl金属间化合物,晶粒均匀细小,呈现等轴状,晶粒大小约为30nm。

英文摘要：

FeAl nanostructured intermetallics were produced by high-energy ball milling followed by low-temperature sintering. The evolution of microstructure of Fe-Al powder during high-energy milling processing was studied. The microstructure of the sinters was investigated. It is revealed that fine grain and homogeneous structure in the Fe-Al powder is obtained by mechanical milling with the increase of milling time. Nanoerystalline FeAl intermetallics is synthesized after sintering the milled powder at 620℃ for 4h. XRD results and AFM images show that the grain size is about 30nm in diameter, with equiaxed shape. Extending the milling time and raising sintering temperature accelerates the formation of FeAl intermetallics. The uhrafine microstructure of the sinter aooarentlv imoroves the properties of FeAl intermetallics.