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通过定容变压法研究了不同温度(25～150℃)与初始压力(10～160 kPa)对Zr9Ni11合金吸氢性能的影响。氢化实验结果表明,随着温度的升高,Zr9Ni11合金平衡压力明显升高,但吸氢量随之降低。当温度低于75℃时,Zr9Ni11合金初始吸氢速率随温度升高而增大,而当温度高于75℃时,初始吸氢速率随温度升高而降低。初始氢气压力对合金动力学性能影响显著,初始氢气压力低于50 kPa时,合金吸氢速率随初始压力增长而急剧增加,并且在初始氢气压力较低时,仍能快速吸氢。合金吸氢量与平衡压力也随初始氢气压力增加而增大。XRD与TEM分析表明,合金在吸氢前主要为Zr9Ni11相,吸放氢循环后,变为混晶,同时存在非晶态。SEM分析显示,合金在氢化过程中表面粗糙化并出现大量裂痕。研究表明,Zr9Ni11合金可以作为除氚的备选材料。
The effects of different temperature (25 ~ 150 ℃) and initial pressure (10 ~ 160 kPa) on the hydrogen absorption of Zr9Ni11 alloy were studied by constant-volume pressure-swinging method. Hydrogenation experiments show that with the increase of temperature, Zr9Ni11 alloy equilibrium pressure increased significantly, but the amount of hydrogen absorption decreases. When the temperature is lower than 75 ℃, the initial hydrogen absorption rate of Zr9Ni11 alloy increases with increasing temperature, while when the temperature is higher than 75 ℃, the initial hydrogen absorption rate decreases with increasing temperature. The initial hydrogen pressure has a significant effect on the kinetic properties of the alloy. When the initial hydrogen pressure is lower than 50 kPa, the hydrogen absorption rate of the alloy increases sharply with the increase of the initial pressure, and hydrogen can be rapidly absorbed when the initial hydrogen pressure is low. The amount of hydrogen absorbed by the alloy and the equilibrium pressure also increase as the initial hydrogen pressure increases. XRD and TEM analyzes show that the alloy is mainly Zr9Ni11 phase before hydrogen absorption, which turns into mixed crystal after hydrogen absorption and desorption cycle, and exists amorphous state at the same time. SEM analysis showed that the alloy surface roughening and a large number of cracks in the hydrogenation process. Studies have shown that, Zr9Ni11 alloy can be used as an alternative tritium material.