Fe—M机械合金化的Mossbauer谱研究

STUDY FOR MECHANICAL ALLOYING OF Fe─M BY MOSSBAUER SPECTROSCOPY

将Ｆｅ—Ｍ（Ｍ＝Ｃ，ＳｉＯ２，Ａｌ２Ｏ３）混合物在Ａｒ中高能球磨５６ｈ后测量Ｍｏｓｓｂａｕｅｒ谱．结果表明，（Ｆｅ）２－（ＳｉＯ２）１仍为Ｆｅ和ＳｉＯ２的机械混合物；（Ｆｅ）７－（Ｃ）３已完全合金化，生成两种Ｆｅ３Ｃ；（Ｆｅ）２－（Ａｌ２Ｏ３）１则成为Ｆｅ（７３％）、尖晶石型的ＦｅＡｌ２Ｏ４（２２％）、金属Ｆｅ的团簇（５％）和Ａｌ２Ｏ３的混合物．

The mechanical alloying of Fe-M(M = C, SiO2, Al2O3) powders was Performed by the use of a high-energy ball milling method. Ball milling was carried out for up to 56h in argon atmosphere. The samples were analized by Mossbauer spectroscoy. The results show that sample for (Fe)2-(SiO2)1 is still mixture of iron and SiO2, alloying is not created at all, the sample for (Fe)7-(C)3 has been alloyied entirely, they producted two type of Fe3C; for (Fe)2-(Al2O3)1, the partial one (22%) formed a FeAl2O4 spinel-type bond,the other one(5%) formed a small metallic iron clusters, the 73% of them is still metallic iron.