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Fe13Ga9 intermetallic in bcc-base Fe–Ga alloy
Intermetallics ( IF 4.3 ) Pub Date : 2021-01-16 , DOI: 10.1016/j.intermet.2020.107059
A. Leineweber , H. Becker , A. Boev , I.A. Bobrikov , A.M. Balagurov , I.S. Golovin

Fe−Ga alloys (Galfenols) are of interest due to their pronounced magnetostriction, whereby the mechanistic understanding is limited. By means of powder X-ray and neutron diffraction it is shown that as-cast Fe-38.4 at%Ga alloy consists of Fe13Ga9 intermetallic with a monoclinic Ni2In/NiAs-related structure, which coexists with bcc solid solution. By means of electron backscatter diffraction it is shown that the Fe13Ga9 intermetallic develops with two different but closely related orientation relationships with respect to the matrix, which can be derived by the relation between the atomic structures of Fe13Ga9 and the matrix. First principles calculations reveal that Fe13Ga9 should be stable at 0 K and that this phase may also expected to develop in alloys for lower Ga contents and may have to be considered upon interpreting macroscopically observed magnetostriction.



中文翻译:

bcc基Fe–Ga合金中的Fe 13 Ga 9金属间化合物

由于Fe-Ga合金(Galfenols)的显着磁致伸缩性,因此引起了人们的关注,从而限制了机械理解。通过粉末X射线和中子衍射表明,铸态的Fe-38.4at%Ga合金由具有单斜Ni 2 In / NiAs相关结构的Fe 13 Ga 9金属间化合物组成,并与bcc固溶体共存。通过电子背散射衍射表明,Fe 13 Ga 9金属间化合物相对于基体具有两种不同但紧密相关的取向关系,这可由Fe 13 Ga 9的原子结构之间的关系得出。和矩阵。第一性原理计算表明,Fe 13 Ga 9应该在0 K处稳定,并且该相还可能在较低Ga含量的合金中发展,并且在解释宏观观察到的磁致伸缩时可能必须考虑该相。

更新日期:2021-01-18
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