首页> 外文会议>Symposium Proceedings vol.885; Symposium on Hydrogen Cycle-Generation, Storage and Fuel Cells; 20051128-1202; Boston,MA(US) >H Diffusion in the H-Storage TiVMnCr Alloys as Deduced from Absorption and Mechanical Spectroscopy Experiments
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H Diffusion in the H-Storage TiVMnCr Alloys as Deduced from Absorption and Mechanical Spectroscopy Experiments

机译:从吸收和机械光谱实验推导的储氢TiVMnCr合金中的H扩散

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摘要

The low H content portion of the PCT absorption curves of the 40Ti-xV-(50-x)Mn-10Cr alloys exhibits a plateau, whose pressure has been determined together with the solubility limit of H in the α-phase (solid solution). The chemical (D_c) and Einstein (D_e) diffusion coefficients of H have been deduced from H absorption kinetics (273 K-1100 K) and from mechanical spectroscopy (150 K-200 K), which has revealed a Snoek-type of anelastic relaxation. The combined Arrhenius plot of D_e and D_c gives the following parameters for H diffusion: W=0.318±0.005 eV, D_0=(4±1)x10~(-7) m~2/s (36 V alloy) and W=0.352±0.005 eV, D_0=(5+1)10~(-7) m~2/s (32 V alloy).
机译:40Ti-xV-(50-x)Mn-10Cr合金的PCT吸收曲线的低H含量部分呈现平稳状态,其压强已确定,并且H在α相(固溶体)中的溶解度极限也已确定。 H的化学(D_c)和Einstein(D_e)扩散系数已从H吸收动力学(273 K-1100 K)和机械光谱学(150 K-200 K)推导得出,这揭示了Snoek型非弹性弛豫。 D_e和D_c的组合Arrhenius图给出了H扩散的以下参数:W = 0.318±0.005eV,D_0 =(4±1)x10〜(-7)m〜2 / s(36 V合金),W = 0.352 ±0.005 eV,D_0 =(5 + 1)10〜(-7)m〜2 / s(32 V合金)。

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