Influence of Additives on Texture Development of Nanocrystalline Nickel
Artikel i vetenskaplig tidskrift, 2012
Organic additives such as saccharin have been frequently used in electroplating
operations to moderate deposit growth rates and to control film quality. In this study, texture
development upon annealing of pulse-electroplated Nickel produced without additives is analyzed
by use of electron backscatter diffraction technique.
Plating without additives results in a microstructure with slightly elongated grains and a <110>
fibre texture in growth direction and this texture is conserved upon annealing up to 600°C.
Structural units in form of groups of elongated grains possessing a common <110> zone axis in
growth direction and twin relationships between themselves are found in the microstructure. For
revealing the influence of additives, the observations are compared with results obtained for Ni and
Ni-Fe plated in the presence of additives where during abnormal grain growth the initial <411>
fibre texture changes to an energetically more favourable <111> texture by twinning. The lack of
additives is assumed to be responsible for the observed differences in texture and microstructure