摘要
用高密度电脉冲处理Ｆｅ７８Ｂ１３Ｓｉ９（Ｍｅｔｇｌａｓ２６０５Ｓ２）非晶合金，形成了纳米晶合金，并用Ｘ射线衍射和透射电镜研究了纳米晶合金的晶粒结构，结果表明，两个晶体相为αＦｅ（Ｓｉ）固溶体和Ｆｅ２Ｂ（ｂｃｔ）化合物，晶粒尺寸为１９ｎｍ．αＦｅ（Ｓｉ）相的晶格参数为ａ＝０２８５６８ｎｍ，Ｆｅ２Ｂ的晶格参数为ａ＝０５１４５ｎｍ和ｃ＝０４２４９ｎｍ．随电脉冲时间的增加，晶粒尺寸略有增加，而晶格参数则相应降低．αＦｅ（Ｓｉ）相晶格参数的减小与晶粒的微弱生长及由此引起的αＦｅ（Ｓｉ）相中的Ｓｉ含量增加有关．而Ｆｅ２Ｂ（ｂｃｔ）相晶格参数的减小是由该相在电脉冲处理过程中较为明显的生长所引起的．
The amorphous Fe78B13Si9 (Metglas 2605S2) was transformed into nanocrystalline alloy by high crurrent density electropulsing. The grain structure was studied using XRD and TEM methods. The results show that two crystalline phases are αFe(Si) solid solution and Fe2B compound,with the average grain size of 19nm,and that lattice parameters of αFe(Si) phase are a=028568nm and those of Fe2B are a=05145nm and c=04249nm. With increasing the electropulsing time,the average grain size increases slightly and lattice parameters decrease. The analysis of the change of lattice parameters reveals that the decrease of the lattice parameter in αFe(Si) phase has a connection with the weak growth of αFe(Si) grains and the induced increase of Si concentration in αFe(Si) phase,and that the decrease of the lattice parameters in Fe2B phase is caused by the remarkable growth of Fe2B grains during electropulsing.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第3期247-250,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金
东北大学中青年科学基金
关键词
电脉冲
纳米晶化
非晶态合金
纳米晶合金
electropulsing,amorphous Fe78B13Si9,nanocrystallization,crystallite structure.
