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采用机械合金化制备了Mg76-xVxTi12Ni12(x=4、8、12、16)合金,通过X射线衍射(XRD)、扫描电子显微镜(SEM)和压强-成分-温度(PCT)等分析方法对合金粉末进行分析和表征。结果表明,合金相主要由Mg2Ni相和Ti2Ni相组成,Mg76-xVxTi12Ni12(x=4、8、12、16)合金贮氢量(质量分数,下同)分别为3.71%、3.12%、2.85%和2.33%,随着V含量的增加,合金的贮氢量下降,合金氢化物释氢率分别为95.1%、97.1%、84.9%和94.4%,适量的V能提高合金氢化物的释氢率。
The alloy Mg76-xVxTi12Ni12 (x = 4,8,12,16) was prepared by mechanical alloying. The alloy was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and pressure-component- temperature (PCT) Powder for analysis and characterization. The results show that the alloy phase mainly consists of Mg2Ni phase and Ti2Ni phase. The hydrogen storage capacity (mass fraction) of Mg76-xVxTi12Ni12 (x = 4,8,12,16) alloys are 3.71%, 3.12%, 2.85% and 2.33%. With the increase of V content, the hydrogen storage capacity of the alloy decreased, and the hydrogen evolution rates of the alloy hydride were 95.1%, 97.1%, 84.9% and 94.4% respectively. Appropriate amount of V could increase the hydrogen release rate of the alloy hydride.