The microstructural characteristics of three different AB-type TiFe hydrogen storage alloys with Zr or ZrCr₂ have been investigated using electron back-scattered diffraction (EBSD) analysis. The major phase of all the as-cast alloys is TiFe phase with the B2 ordered body-centered cubic structure. In addition to the TiFe phase, the TiFeZr and TiFeZrCr alloys have TiFe₂ phase with the hexagonal C14 Laves structure and a small amount of Ti₂Fe phase with a cubic structure. Based on the EBSD analysis, it is observed that the TiFe₂ and Ti₂Fe phases exhibit slightly higher kernel average misorientation (KAM) values and smaller grain sizes than the matrix TiFe phase. First hydrogenation (activation) test results of the as-cast alloys indicate that the hydrogenation is easily achieved under 30 bar of hydrogen at room temperature by adding Zr or ZrCr₂. This seems to be associated with the presence of the TiFe₂ and Ti₂Fe phases with higher strain that might act as gateways for hydrogen transport during hydrogenation together with the phase boundaries. The hydrogenation kinetics of the TiFeZr alloy is considerably faster than that of the TiFeZrCr alloy, which might be attributed to the finer grain size of the TiFe₂ phase in the TiFeZr alloy.

已经使用电子背散射衍射 (EBSD) 分析研究了三种不同的含 Zr 或 ZrCr _{2 的}AB 型 TiFe 储氢合金的显微结构特征。所有铸态合金的主要相是具有 B2 有序体心立方结构的 TiFe 相。除TiFe相外，TiFeZr和TiFeZrCr合金还具有六方C14 Laves结构的TiFe ₂相和少量立方结构的Ti ₂ Fe相。基于 EBSD 分析，观察到 TiFe ₂和 Ti ₂与基体 TiFe 相相比，Fe 相表现出略高的内核平均取向差 (KAM) 值和较小的晶粒尺寸。铸态合金的首次加氢（活化）试验结果表明，加入Zr或ZrCr _{2 ，}在室温下30巴氢气下很容易实现加氢。这似乎与具有较高应变的 TiFe ₂和 Ti ₂ Fe 相的存在有关，它们可能与相界一起在氢化过程中充当氢传输的门户。TiFeZr 合金的氢化动力学比 TiFeZrCr 合金快得多，这可能是由于TiFeZr 合金中TiFe ₂相的晶粒尺寸更细。