机械活化Fe-Al粉在SPS烧结条件下的相变特征  

Characteristics of phase transition in spark plasma sintering of mechanically activated Fe-Al powders

作　　者：王海兵[1] 望斌[1] 

机构地区：[1]武汉大学动力与机械学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2006年第4期54-58,共5页Engineering Journal of Wuhan University

基　　金：湖北省十五重点攻关项目(2001AA101B02)资助

摘　　要：采用机械活化-放电等离子烧结(MASPS)方法制备FeAl金属间化合物,利用差热分析仪、X射线衍射、扫描电镜和能谱对烧结过程相的变化、组织形貌和反应过程进行了研究,发现在500℃时,Fe与Al还是以单质形式存在,600℃时,单质Al消失,并伴随有Fe2Al5的生成,700℃时有FeAl生成,在900℃时则只有FeAl.采用该种方法可以快速原位制得FeAl金属间化合物.FeAl intermetallics has been prepared using mechanically activated spark plasma sintering （MASPS）. The evolution of phases, microstructures and sintering process were investigated by differential thermal analyzer（DTA）, X-ray diffraction, scanning electron microscopy（SEM） and energy-dispersive X-ray （EDX） analysis. It was found that the sample after heating to 500℃contained elemental Fe and Al, free Al disappeared and Fe2A15 was obtained at 600℃ ; and it showed the onset of FeAl at 700℃; only FeAl phase existed at 900℃. The FeAl intermetallics can be in situ fabricated quickly in this way.

关 键 词：机械活化(MA) 放电等离子烧结(SPS) FE-AL金属间化合物 

分 类 号：TG146.22[一般工业技术—材料科学与工程]