Effect of phase formation on hydrogen storage properties in Ti-V-Mn alloys by zirconium substitution
作者： X.Y. Chen , R.R. Chen , X. Ding , H.Z. Fang , X.Z. Li
DOI: 10.1016/J.ENERGY.2018.10.121
关键词:
摘要: Abstract In order to improve hydrogen storage properties of Ti23V40Mn37 alloy with the two-phase mixture BCC and C14 Laves, alloys different Zr (x = 0, 2, 4, 6, 8 10, at.%) partly substituting for Ti have been produced. The results show that primary (dendrite) phase decreases Laves increases increasing Zr. secondary (blocky) appears when content is more than 6 at.%. absorption rate after completely activated because improves formation phase. Meanwhile, reversible capacity Zr-substituted higher Zr-free alloy. effective reaches maximum composition Ti21Zr2V40Mn37, a value 1.85 wt.% at 293 K. Two desorption plateaus appear 6 at.%, width plateau from fast diffusion H atom in smaller With content, hysteresis slope factor increase, which can be attributed strain energy interstitial sites affinity H.
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