B2有序铁铝化合物加锰后的价电子结构

Valence Electron Structure of B2-ordered Iron Aluminide with Mn Addition

摘要: 利用透射电镜分析了加锰后B2有序铁铝化合物的微观结构,并运用固体经验电子理论探讨了微量元素锰加入后对B2有序铁铝化合物价电子结构的影响.结果表明:在B2有序结构中,锰原子占据Ⅱ亚点阵位置的倾向较大.微量锰加入铁铝B2有序结构使铁铝原子间最近邻位键强有所增加、铁铁原子间最近邻位键强有所减弱;微量锰的加入可增加合金的B2有序倾向.

Abstract: TEM was used to investigate the valence electron and ordering structure of B2-ordered iron aluminide with Mn addition.The addition of Mn into B2-ordered iron aluminide could strengthen the FeⅡ-AlⅠ bonding and weaken the FeⅡ-FeⅠ bonding strength,leading to increase B2 ordering.