The phase composition, particle size distribution and morphology of cobalt and nickel powders and foam nickel are examined by X-ray diffraction, laser diffraction and scanning electron microscopy methods. Cobalt and nickel powders obtained by electrolysis of solutions are found to have a dendritic structure. It is shown that the morphology and microstructure of particles of nanostructured cobalt and nickel powders and of nanostructured foam nickel can be described with a three-level (according to particle size) model.