Nuclear magnetic resonance methods were used to investigate the effect of small amounts of V upon H diffusion. The temperature dependence of the proton spin-lattice relaxation time was obtained, at 27MHz, for samples which represented the a-, ß- and γ-phases of the system. The probable location of H in the ß phase was found to be the octahedral Oz sites of the body-centered cubic lattice. The activation energy for diffusion in the ß phase of alloys which contained about 4%V was 2.3kcal/mol. This was equal to about 1/3 of the value for the V-free case. This amount of V had very little effect upon the activation energy in the a phase; where it was found that the activation energy was 11.5kcal/mol. It was also found that V decreased the H diffusion activation energy in the γ phase, and caused a non-linearity of the Arrhenius plot. The activation energies at lower temperatures were equal to 11.2, 9.7 and 9.0kcal/mol for TiH1.70 + 1.03%V, TiH1.74 + 2.59%V and TiH1.63 + 4.36%V, respectively.

C.Korn, D.Teitel: Physica Status Solidi B, 1977, 44[2], 755-63