Study of Hydrogen in Hf7Ni10 Combined with TiV0.8Cr1.2 by PAC
Perturbed Angular Correlation (PAC) measurements were performed at room temperature on samples of Hf7Ni10 and of Hf7Ni10 combined with TiV0.8Cr1.2, and at temperatures in the range from 17 K to 350 K in a concentrated hydride of the combined alloy. The PAC results show that the Hf7Ni10 intergranular phase becomes amorphous in the combination process. The results for the hydride composite show in the Hf7Ni10 phase the formation of a stable interstitial hydrogen state below 100 K and a smooth rearrangement of the hydrogen atoms position above 100 K,corresponding to a slow diffusion movemnet of a short-range nature. A second phase transition is observed at around 300 K, presumably to aphase precursor of the hydrogen desorption of the hydride.
J.-L. Bobet, B. Chevalier and D. Fruchart
J.M. Gil et al., "Study of Hydrogen in Hf7Ni10 Combined with TiV0.8Cr1.2 by PAC", Solid State Phenomena, Vol. 170, pp. 293-297, 2011