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In-grain phase separation and structural ordering in Fe–Ga alloys seen from reciprocal space
Intermetallics ( IF 4.3 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.intermet.2020.107016
A.M. Balagurov , D. Yu Chernyshov , A.А. Bosak , I.A. Bobrikov , S.V. Sumnikov , I.S. Golovin

Abstract Single crystal synchrotron diffraction was used for detailed analysis of ordering effects in alloys with a nominal composition of Fe80.5Ga19.5 and Fe73.1Ga26.9. The first composition manifests a disordered average A2 structure with local fluctuations resembling a D03 ordering motif in the lengthscales of ~50 A. In Fe73.1Ga26.9 alloy ordered over a long range, a D03 matrix coexists with ~100 A inclusions of a new ordered phase, presumably hexagonal with lattice parameters a ≈ 8 a0 and c ≈ 12 a0, where a0 = 2.87 A is the unit cell dimension of body-centered cubic Fe.

中文翻译:

从倒易空间看Fe-Ga合金的晶内相分离和结构有序

摘要 单晶同步加速器衍射用于详细分析标称成分为 Fe80.5Ga19.5 和 Fe73.1Ga26.9 的合金的有序效应。第一种成分表现出无序的平均 A2 结构,局部波动类似于 D03 有序基序在 ~50 A 的长度范围内。在 Fe73.1Ga26.9 合金中,在长范围内有序排列,D03 基体与 ~100 A 的新夹杂物共存有序相,大概是六方晶格参数 a ≈ 8 a0 和 c ≈ 12 a0,其中 a0 = 2.87 A 是体心立方 Fe 的晶胞尺寸。
更新日期:2021-01-01
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