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采用XRD、中子衍射、原位变温X射线衍射和热重分析对Ti29.25Cr26.59V37.25Fe6.91Ce1.10合金的放氢特性进行研究。结果表明:合金氘化物(平衡压为2MPa)中主相金属原子占据4a位置,大部分氘占据8c位置,合金氘化物具有FCC结构。合金氢化物在放氢过程中发生两次相变,其中,在较低温度下发生的相变对应于含氢量高的β氢化物向含氢量低的α氢化物的转变,而在较高温度下的相变则对应于α氢化物向无氢BCC合金相的转变。β氢化物具有变形的FCC结构(P4/mmm),α氢化物具有BCT结构(I4/mmm)。
The hydrogen desorption characteristics of Ti29.25Cr26.59V37.25Fe6.91Ce1.10 alloy were studied by XRD, neutron diffraction, in-situ temperature-programmed X-ray diffraction and thermogravimetric analysis. The results show that the main phase metal atoms occupy the position 4a, the majority of deuterium occupy the position 8c, and the alloy deuterates have FCC structure in the alloy deuteride (equilibrium pressure of 2MPa). The phase transition occurs during the hydrogen desorption of the alloy hydride, wherein the phase transitions occurring at lower temperatures correspond to the transformation of the β hydride with high hydrogen content to the α hydride with low hydrogen content, The phase transition at high temperature corresponds to the transformation of α hydride to hydrogen-free BCC alloy phase. The β hydride has a deformed FCC structure (P4 / mmm) and the α hydride has a BCT structure (I4 / mmm).