The influence of Mo addition on the microstructure and its thermal stability for electrodeposited Ni films
- Department of Materials Physics, Eötvös Loránd University, P.O.B.32, Budapest H-1518 (Hungary)
- Wigner Research Centre for Physics, Hungarian Academy of Sciences, P.O.B. 49, Budapest H-1525 (Hungary)
- Institute for Technical Physics and Materials Science, Centre for Energy Research, Hungarian Academy of Sciences, Budapest (Hungary)
Highlights: • The effect of Mo and saccharin additions on the stability of Ni layers was studied. • Both Mo and saccharin increased the defect density and reduced the grain size. • The higher Mo content resulted in a much better thermal stability. • At the same time, saccharin addition yielded a reduced stability of nanostructures. • The electrodeposited film had a better stability than the SPD-processed counterpart. - Abstract: An investigation was conducted to study the effect of molybdenum (Mo) alloying on the grain size and lattice defect structure in nanocrystalline nickel (Ni) films processed by electrodeposition. Moreover, the influence of saccharin addition to the electrolyte bath on the microstructure of Ni-Mo layers with low and high Mo contents was studied. It was found that the higher Mo content resulted in a larger dislocation density and twin fault probability as well as a smaller grain size. The addition of saccharin to the bath resulted in a further increase in the density of both dislocations and twin faults. It was also revealed that Mo alloying improved the thermal stability of the nanostructure in Ni films while saccharin addition yielded a reduction of stability. The reasons for these opposite behaviors were discussed in detail. In addition, the defect structure and its stability in Ni-Mo layers were compared with that for fine-grained bulk samples with the same composition but processed by severe plastic deformation.
- OSTI ID:
- 22805891
- Journal Information:
- Materials Characterization, Journal Name: Materials Characterization Vol. 145; ISSN 1044-5803; ISSN MACHEX
- Country of Publication:
- United States
- Language:
- English
Similar Records
In-situ scanning probe microscopy of electrodeposited nickel.
PROPERTIES AND NANOSTRUCTURES OF NANO-MATERIALS PROCESSED BY SEVERE PLASTIC DEFORMATION (SPD)