STRUCTURE AND ENERGY OF Ni/NiO INTERFACES

H. Sawhill , L. Hobbs

The structure and energy of Ni/NiO interfaces in oxidized high purity nickel were investigated using Transmission Electron Microscopy. Parallel and transverse section techniques were employed in producing TEM specimens. The Ni/NiO interface structures observed were compared with cell matching models (extended CSL-DSC) as well as models based on matching close-packed directions across the interface. Moiré fringes were observed in interfaces possessing strong topotactic relations between the Ni and NiO. Special attention was paid to the geometry of the moiré fringes and analytic models were developed to describe moiré fringe behavior in inclined interfaces. Estimates for the energy of Ni/NiO interfaces were obtained from dihedral angle measurements at triple grain junctions between Ni and NiO grains. The energies are reported as ratios of Ni/NiO interface energies to either Ni or NiO grain boundary energies for which reasonably precise estimates are available.

Domaines: Articles anciens

H. Sawhill, L. Hobbs. STRUCTURE AND ENERGY OF Ni/NiO INTERFACES. Journal de Physique Colloques, 1985, 46 (C4), pp.C4-117-C4-122. ⟨10.1051/jphyscol:1985413⟩. ⟨jpa-00224662⟩