中文摘要：

以便改进 Mg2Ni 类型合金的 hydriding 和 dehydriding 动力学，在合金的 Ni 被元素公司代替 nanocrystalline 和非结晶的 Mg2Ni 类型 Mg2Ni1x 公司 x (x=0， 0.1， 0.2， 0.3， 0.4 ) 合金被融化旋转综合技术。当演员组和旋转合金的结构与 X 光检查衍射计(XRD ) 和高决定传播被学习电子显微镜(HRTEM ) 。同样旋转的合金的热稳定性上的调查与微分扫描热量计(DSC ) 被执行。合金的氢吸收和解吸附作用动力学与一台自动地控制的 Sieverts 仪器被测量。结果证明为 Ni 的公司的替换不改变 Mg2Ni 的主要阶段，但是导致第二等的阶段 MgCo2 的形成。没有非结晶的阶段被检测在同样旋转共同释放非结晶的阶段的合金，而是某个数量清楚地在同样旋转的共同包含的合金被发现。为 Ni 的公司的替换对同样旋转的合金的 hydriding 动力学施加细微影响。然而，它戏剧性地提高当演员组和旋转合金的 dehydriding 动力学。作为内容(x) 从 0 ～ 0.4 增加的公司，为同样旋转的合金(30 m/s ) 的为当演员组合金的 20 min 的从 0.19% ～ 1.39% ，并且从 0.89% ～ 2.18% 的氢解吸附作用能力增加(集体部分)( 集体部分) 。

英文摘要：

In order to improve the hydriding and dehydriding kinetics of the Mg2Ni-type alloys, Ni in the alloy is substituted by element Co. The nanocrystalline and amorphous Mg2Ni-type Mg2Ni1-xCox （x=0, 0.1, 0.2, 0.3, 0.4） alloys were synthesized by melt-spinning technique. The structures of the as-cast and spun alloys were studied with an X-ray diffractometer （XRD） and a high resolution transmission electronic microscope （HRTEM）. An investigation on the thermal stability of the as-spun alloys was carried out with a differential scanning calorimeter （DSC）. The hydrogen absorption and desorption kinetics of the alloys were measured with an automatically controlled Sieverts apparatus. The results demonstrate that the substitution of Co for Ni does not alter the major phase of Mg2Ni but results in the formation of secondary phase MgCo2. No amorphous phase is detected in the as-spun Co-free alloy, but a certain amount of amorphous phase is clearly found in the as-spun Co-containing alloys. The substitution of Co for Ni exerts a slight influence on the hydriding kinetics of the as-spun alloy. However, it dramatically enhances the dehydriding kinetics of the as-cast and spun alloys. As Co content （x） increases from 0 to 0.4, the hydrogen desorption capacity increases from 0.19% to 1.39% （mass fraction） in 20 min for the as-cast alloy, and from 0.89% to 2.18% （mass fraction） for the as-spun alloy （30 m/s）.