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本文采用X射线衍射Rietveld全谱拟合分析研究了AB2型Laves相贮氢合金Zr（Mn0.45-xVxNi0.55）2（x＝0．10-0.40）的相组成和相含量Rietveld拟合分析结果表明，Zr（Mn0.45-xVxNi0.55）2合金由C15，C14型Laves相和Zr9M11，ZrM等非Laves相组成，Laves相和ZX9M11相在整个成分范围内存在，而ZrM相仅在x＝0.20—0.40范围内出现，当x＝0．05—0.15时，合金由C15，C14和Zr9M11相组成，其中C15型Laves相为主相；当x＝0．20—0．40时．合金则由C15；C14型Laves相及Zr9M11，ZrM相组成，主相则为C15和C14混合相,非Laves相中，Zr9M11相含量在整个成分范围内变化不大，而ZrM相含量则波动较大实验结果表明，各相的晶格参数均随合金中V含量的增加而增大，V取代Mn导致各相晶格体积膨胀计算表明，Laves相的出现类型与合金外层电子浓度有关.
In this paper, the Rietveld fitting analysis of the phase composition and phase content of AB2-type Laves phase hydrogen storage alloy Zr (Mn0.45-xVxNi0.55) 2 (x = 0.10-0.40) was carried out by X-ray diffraction Rietveld full spectrum fitting analysis The results show that the Zr (Mn0.45-xVxNi0.55) 2 alloy consists of non-Laves phases such as C15 and C14 Laves phases and Zr9M11 and ZrM phases. The Laves phase and the ZX9M11 phase exist in the entire composition range, whereas the ZrM phase only exists in the x = 0.20-0.40, when x = 0.05-0.15, the alloy consists of C15, C14 and Zr9M11 phases, of which Caves Laves phase is the main phase; when x = 0.20-0.40. The alloy consists of C15, C14 Laves phase and Zr9M11 and ZrM phases, while the main phase is C15 and C14 mixed phase. In non-Laves phase, the content of Zr9M11 phase does not change much in the whole composition, while the content of ZrM phase fluctuates The experimental results show that the lattice parameters of each phase increase with the increase of the content of V in the alloy. V substitution of Mn results in the lattice expansion calculation of each phase, which shows that the appearance of Laves phase is related to the electron concentration of the outer layer of the alloy.