Trapping of Hydrogen in Vacancies at Substitutional Hafnium in Niobium*

Roitzheim, R. D.; Rudolph, H. J.; Schumacher, R. T.; Wrede, U.; Vianden, R.

doi:10.1524/zpch.1989.164.part_1.0999

Cited by 4 publications

(1 citation statement)

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“…The trapping of defects by In and Rh impurities has been reported in Nb by ~Cd and ~Rh TDPAC measurements (Sielemann et al 1981;Vianden and Winand 1981). 181Ta TDPAC measurements have been reported on proton implanted Nb where, the trapping of hydrogen decorated vacancies by Hf impurities has been observed (Vianden and Winand 1981;Roitzheim et al 1989). Recent measure-*Author for correspondence ments on proton implanted N__&bHf with probe atoms introduced in the sample by alloying indicate the formation of H-V complexes associated with probe atoms (Govindaraj and Gopinathan 1997).…”

Section: Introductionmentioning

confidence: 96%

Cold-worked and hydrogen chargedNbHf as studied by TDPAC and positron lifetime measurements

et al. 1998

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Time differential perturbed angular correlation (TDPAC) and positron lifetime measurements on cold-worked and hydrogen charged NbHf indicate a strong binding of hydrogen decorated vacancy clusters with Hf impurities. Both TDPAC and positron lifetime results are mutually consistent on this aspect. Transformation of H-vacancy clusters into H-bubbles is indicated by the positron lifetime behaviour at annealing temperatures beyond 900 K. Impurity effects like oxygen pickup and coating of voids cannot be ruled out at elevated temperatures.

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