熔体快淬Zr0.9Ti0.1V2.2合金的微结构与储氢性能

Microstructure and Hydrogen Storage Properties of Melt-spun Zr0.9Ti0.1V2.2

摘要:

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α-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

Abstract:

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