采用机械合金化法制备了Fe84Nb3V4B9纳米晶粉末,并利用扫描电镜、X射线衍射仪等对其形貌、结构和热稳定性进行了分析.结果表明:组分为Fe84Nb3V4B9的混合粉体在球磨96 h后,αFe相平均晶粒尺寸约为10 nm;此后于100～350℃退火没有新相生成,并且纳米晶粒无明显长大,表现出较好的热稳定性;钒元素的加入能够增加粉末的均匀性、细化晶粒、加速合金化过程以及增加合金相的耐热稳定性,因此,钒部分替代铌制备FeMB纳米晶软磁材料具有明显的可行性和经济效益.
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