Superabundant vacancies

Fuk] Fukai, Y, Mori, K., Shinomiya, H., The Phase Diagram and Superabundant Vacancy Formation in Fe-H Alloys under High Hydrogen Pressures , J. Alloys Compd., 348,105-109 (2003) (Phase Diagram, Phase Relations, Experimental, 42)... 

Vacancies, being ubiquitously present in solids and having the ability to act as impurity traps, could play a central role in H embrittlement as hinted by some recent experiments. One set of experiments has established that H could induce superabundant vacancy formation in a number of metals, such as Pd, Ni, Cr, and so on [89,90]. The estimated vacancy concentration. 

Fukai Y, Okuma N. Formation of superabundant vacancies in Pd hydride under high hydrogen pressures. Phys. Rev. Lett. 1994 73 1640-1643. 

Fukai Y. Superabundant vacancies formed in metal hydrogen alloys. Phys. Scr. 2003 T103 11-14. 

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