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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Correlation of substitutional solid solution with hydrogenation properties of TiFe1-xMx(M=Ni, Co, Al) alloys
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Correlation of substitutional solid solution with hydrogenation properties of TiFe1-xMx(M=Ni, Co, Al) alloys

机译：TiFe1-xMx（M = Ni，Co，Al）合金的替代固溶体与氢化性能的关系

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摘要

The hydrogenation properties of TiFe partiallysubstituted with a small amount of Ni, Co, or Al for Fe werestudied. Complete solid solutions were observed for allcompositions, but different characteristics of the pressure-composition-temperature (P-C-T) curves were observed. For Ni-and Co-substituted alloys, the shape of the P-C-T curves and thehydrogen storage capacities were very similar to those of pureTiFe. The plateau pressures in the two-phase (α-β) region alwaysremained flat, but decreased drastically as the amount of nickel orcobalt was increased. The different hydrogenation behaviors areexplained on the basis of different values of hydride formationenthalpies of TiFe, TiNi, and TiCo. When Fe was partiallyreplaced by Al, a solid solution was also formed, but the sizes ofthe octahedral sites were changed. The hydrogen storage capacitywas decreased and the slope of the plateau pressure increased asthe amount of aluminum increased. The change of slope of theplateau pressure is explained and modeled by the various sizes ofthe octahedral sites.
机译：研究了用少量的Ni，Co或Al部分取代的TiFe的氢化特性。观察到所有成分完全固溶，但观察到压力-成分-温度（P-C-T）曲线的不同特征。对于镍和钴取代的合金，P-C-T曲线的形状和储氢能力与纯钛铁非常相似。两相（α-β）区域的平稳压力始终保持平坦，但随着镍或钴含量的增加而急剧下降。根据TiFe，TiNi和TiCo的氢化物形成焓的不同值来解释不同的氢化行为。当Fe被Al部分替代时，也形成了固溶体，但是八面体位点的大小发生了变化。随着铝含量的增加，储氢能力下降，平台压力斜率增大。通过八面体位置的各种大小来解释和建模高原压力斜率的变化。

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