为改善Zr-Ti-V系列Laves相合金的吸氢动力学性能,本研究设计成分为Zr0.9Ti0.1V2.2的非化学计量比合金并采用熔体快淬工艺制备合金薄带.研究合金快淬薄带的微观组织与相结构、吸氢动力学、吸放氢PCT特征及吸氢热力学参数.进而讨论非化学计量比合金中微结构与储氢性能之间的关系.结果表明,快淬薄带中合金主相为C15型ZrV2及V-bcc相,熔体快淬可消除铸态合金中的包晶反应残留相a-Zr.熔体快淬合金的吸氢动力学性能优异,但由于单胞体积收缩导致其吸氢量降低.
The non-stoichiometric Zr0.9Ti0.1V2.2 alloy was designed and the melt-spun technology was used in this work to improve the hydrogenation kinetics of Laves phase Zr-Ti-V alloys.The microstructure,phase constitution,hydrogenation kinetics,PCT characteristics and the thermodynamics parameters of melt-spun ribbons were investigated.The relationship between microstructure and hydrogen storage properties of non-stoichiometric alloys was further discussed.The results show that C15 type ZrV2 phase and V-bcc phase are the dominant phases in the alloy,and melt-spun can eliminate the residual α-Zr phase of peritectic reaction in the as-cast alloy.The hydrogenation kinetics is fast in melt-spun alloy,but the hydrogen absorption capacity decreases due to the shrink of cell volume.
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