Abstract The crystal structure of AB 2 metal hydride alloys of composition Ti 0.5 Zr 0.5 (Mn 1-x Fe x )Cr 1 , x = 0, 0.2, 0.4 in the as-cast state and after heat treatment has been investigated. Based on SEM and X-ray diffraction results, all alloys were found to be multiphase. The best fitting of Rietveld refinement shows that the two main phases of each alloy have the same hexagonal structure with closely related lattice parameters and chemical composition. There is also some evidence that the microstrain values determined by Rietveld refinements are in fact an expression of composition variation within the phase and not a pure microstrain.

中文翻译：

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铸态和热处理态 Ti 0.5 Zr 0.5 (Mn 1-x Fe x )Cr 1 的晶体结构，x=0, 0.2, 0.4

摘要 研究了铸态和热处理后由 Ti 0.5 Zr 0.5 (Mn 1-x Fe x )Cr 1 , x = 0, 0.2, 0.4 组成的 AB 2 金属氢化物合金的晶体结构。根据 SEM 和 X 射线衍射结果，发现所有合金都是多相的。Rietveld 细化的最佳拟合表明，每种合金的两个主要相具有相同的六方结构，且晶格参数和化学成分密切相关。还有一些证据表明，由 Rietveld 改进确定的微应变值实际上是相内成分变化的表达，而不是纯微应变。