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利用X衍射等技术对纯钛和5种成分(Ti-5,10,20,30和40Mo,质量分数, ％)Ti—Mo二元合金吸氢前后的相组成、晶格常数变化和吸氢特性进行了研究.结果显示: 5种成分Ti—Mo合金饱和吸氢后均形成了较单一的面心立方δ相氢化物(Ti(1-x)MoxH1.97).δ相晶格常数随Mo含量增加先呈增加趋势,约10％Mo含量处达最大值,Mo含量继续增加则呈降低趋势,而体心立方β相TiMo合金的晶格常数随Mo含量的增加呈单一的减小趋势.随Mo含量的增加,氢化物的室温平衡压逐渐增加,但含Mo量不大于10％时,增加量并不明显.结合第一原理计算的相应结果,对上述现象进行讨论.
X-ray diffraction and other techniques for pure titanium and five components (Ti-5,10,20,30 and 40Mo, mass fraction,%) Ti-Mo binary alloy before and after hydrogen absorption phase change, lattice constant changes and hydrogen absorption The results show that the Ti-Mo hydride (Ti (1-x) MoxH1.97) forms a single face-centered cubic Ti-Mo alloy with saturation hydrogen absorption The content of Mo increased first, the content of Mo was about 10%, and the content of Mo continued to decrease, while the lattice constant of bulk cubic TiMi alloy decreased with the increase of Mo content With the increase of Mo content, the equilibrium pressure of hydride at room temperature gradually increases, but the increase is not obvious when the Mo content is not more than 10% .Based on the corresponding results calculated by the first principle, the above phenomenon is discussed.