Improved Hardness and Thermal Stability of Nanocrystalline Nickel Electrodeposited with the Addition of Cysteine

Experiments were conducted for the study of the effect of cysteine addition on the microstructure of nanocrystalline Ni films electrodeposited from a nickel sulfate-based bath. Furthermore, the thermal stability of the nanostructure of Ni layers processed with cysteine addition was also investigated...

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Bibliographic Details
Published in:Nanomaterials (Basel, Switzerland) Switzerland), 2020-11, Vol.10 (11), p.2254
Main Authors: Kolonits, Tamás, Czigány, Zsolt, Péter, László, Bakonyi, Imre, Gubicza, Jenő
Format: Article
Language:English
Subjects:
cysteine
electrodeposition
hardness
microstructure
nickel
thermal stability
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Summary:Experiments were conducted for the study of the effect of cysteine addition on the microstructure of nanocrystalline Ni films electrodeposited from a nickel sulfate-based bath. Furthermore, the thermal stability of the nanostructure of Ni layers processed with cysteine addition was also investigated. It was found that with increasing cysteine content in the bath, the grain size decreased, while the dislocation density and the twin fault probability increased. Simultaneously, the hardness increased due to cysteine addition through various effects. Saturation in the microstructure and hardness was achieved at cysteine contents of 0.3-0.4 g/L. Moreover, the texture changed from (220) to (200) with increasing the concentration of cysteine. The hardness of the Ni films processed with the addition of 0.4 g/L cysteine (∼6800 MPa) was higher than the values obtained for other additives in the literature (
ISSN:2079-4991
2079-4991
DOI:10.3390/nano10112254