铁硅合金的放电等离子烧结行为  

Sintering Behavior of Iron-silicon Alloy by Spark Plasma Sintering

作　　者：祁庆庆[1] 李俊国[1] 沈强[1] 张联盟[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430070

出　　处：《武汉理工大学学报》2010年第7期1-4,共4页Journal of Wuhan University of Technology

基　　金：国家高技术863计划(2002AA327080)

摘　　要：以雾化Fe粉和FeSi合金粉末为原料,采用放电等离子烧结(SPS)制备Fe-6.5%Si高硅硅钢片,通过XRD,SEM等测试手段对样品进行分析。结果表明,铁硅合金的烧结过程可以分为4个阶段;当温度为1 100℃时气孔率为1.48%;烧结过程中主要发生以Fe3Si颗粒为核心反应扩散,烧结初期为颗粒间的紧密结合,烧结中期颗粒的界面处有Fe3Si相生成,形成FeSi过渡层,烧结后期直接形成了Fe(Si)的单一固溶体相。The spark plasma sintering technique is employed to fabricate Fe-6.5%Si sheet from water atomized iron and FeSi powders.The porosity,phase composition and surface image of the samples sintered at different temperature have been studied.The results indicate that the sintering behavior of iron-silicon could be classified to four steps.The porosity is 1.48% at 1 100 ℃;the mechanism of reaction diffusion during sintering is discussed.At the initial stage,there is no interface diffusion and reaction,when temperature increased then the Fe3Si layer grows by the reaction of Fe and Si atoms in Fe/FeSi interface.Finally the Fe3Si layers have vanished and made the phase of sample changed into the single Fe（Si） solid solution at 1 150 ℃.

关 键 词：放电等离子烧结(SPS) Fe-6.5%Si 气孔率 反应扩散 微观结构 

分 类 号：TG146.22[一般工业技术—材料科学与工程]