Anisotropic diffraction peak broadening and dislocation substructure in hydrogen-cycled LaNi5 and substitutional derivatives

Hydrogen absorption-desorption cycling in LaNi5 and substitutional derivatives induces anisotropic diffraction peak broadening. The change of the anisotropy as a function of substitution (by Co, Mn, Al, Fe, Cu, Sn and Ce) is discussed in terms of various dislocation substructures.