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本文叙述了利用电子显微镜对含10％Si和5％Al的Fe-Si-Al高导磁合金薄膜进行的结构研究。发现了基体为有序面心立方Fe_3(Al,Si)结构,其晶格参数为5.70±0.03A,该值在Fe_3Si和Fe_3Al晶格参数之间,说明部分Si原子为Al原子所置换。并获得三套基体和析出相合成的电子衍射图,相应确定了基体和析出相的取向关系:(001)_基‖(110)_相;[100]_基‖[00I]_相;[010]_基‖[I10]_相。 对析出相的萃取碳复型,在电子显微镜中进行选区衍射,获得了立方Fe_3(Al,Si)C_x相的结构。提出:Fe原子占据面心;Al或Si原子占据顶角;C原子占据体心的看法。
This article describes the use of electron microscopy for the structure of Fe-Si-Al high permeability magnetic alloy films containing 10% Si and 5% Al. It was found that the matrix was ordered face-centered cubic Fe_3 (Al, Si) with a lattice parameter of 5.70 ± 0.03A, which was between the lattice parameters of Fe_3Si and Fe_3Al, indicating that some Si atoms were replaced by Al atoms. And obtaining three sets of electron diffraction patterns of the matrix and the precipitated phase, the orientations of the matrix and the precipitated phase are determined correspondingly: (001) _base_ (110) _ phase; [100] _base_ [00I] _ phase; 010] _base_ [I10] _ phase. For the extracted carbon double phase of the precipitated phase, selective diffraction was performed in an electron microscope to obtain a cubic Fe_3 (Al, Si) C_x phase structure. It is proposed that Fe atoms occupy facet centers, Al or Si atoms occupy vertex angles, and C atoms occupy body centers.