采用非均相沉淀-热还原法制备了Fe/Si3N4颗粒复合粉末并在热处理温度1873 K和0.1 MPa氮气气氛下进行常压与热压烧结.通过扫描电镜(SEM)、透射电镜(TEM)、电子能谱(EDS)、X射线衍射(XRD)等方法观察Fe/Si3N4复合粉末的结构形貌及常压、热压烧结后的微观组织.结果表明:Fe/Si3N4复合粉末物相主要存在Fe相与Si3N4相,微观结构为纳米薄层Fe均匀包覆Si3N4颗粒;高温烧结后的常压与热压样品的组织成分与微观结构有极大的不周,除了存在Si3N4相之外,常压样品金属Fe相衍射蜂消失,并有晶粒粗大铁硅化合物生成,热压样品则保留有金属Fe相,并存在晶粒相对细小铁硅化合物及致密的玻璃态物质.
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