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用Ｘ射线衍射（ＸＲＤ）分析方法，探讨了ＡＢ５ 型稀土贮氢合金在不同冷却速度下织构生长特性及其对电极性能的影响。研究结果表明：在普通快冷条件下，具有不同成分的贮氢合金锭呈不同的织构生长特性，一般具有（１０１）＋ （００２）晶面择优取向，平行于冷却面也即柱状晶生长方向，并可获得较高的放电容量；在快速凝固下制得的贮氢合金，其表面呈强的（０００２）基极织构也即ｃ轴织构。这与不含Ｍｎ 的稀土贮氢合金即Ｍｍ Ｎｉ３．５Ｃｏ０．７ Ａｌ０．８合金锭的柱状晶结构具有强的ｃ轴织构取向以及定向凝固合金在不同冷却速率下的织构取向相一致
X - ray diffraction (XRD) analysis method was used to investigate the growth characteristics of AB5 rare earth hydrogen storage alloy at different cooling rates and its effect on the electrode properties. The results show that the hydrogen storage alloy ingots with different compositions have different texture growth characteristics under general fast cooling conditions, and generally have the preferred orientation of (101) + (002) planes, parallel to the cooling surface, ie, the growth of columnar crystals Direction and higher discharge capacity can be obtained. The hydrogen storage alloy prepared under rapid solidification has a strong (0002) base texture, that is, a c-axis texture. This is consistent with the strong c-axis texture orientation of the columnar crystal structure of the Mn-free rare earth hydrogen storage alloy Mm Ni3.5Co0.7 Al0.8 alloy ingot and the texture orientation of the directional solidification alloy at different cooling rates