Title :
Development of nanocrystalline nickel by pulse reverse microelectroforming
Author :
Ligeng Shao ; Liqun Du ; Liding Wang
Author_Institution :
Key Lab. for Precision & Non-Traditional Machining Technol. of Minist. of Educ., Dalian Univ. of Technol., Dalian, China
fDate :
6/1/2010 12:00:00 AM
Abstract :
Pulse reverse microelectroforming is proposed in order to improve mechanical properties of nanocrystalline metal deposits. Under different positive and negative current conditions, nanocrystalline nickel deposits were synthesised by pulse reverse microelectroforming. The reason why the grain sizes of deposits were decreased in pulse reverse microelectroforming was analysed. While positive current density exceeds 10 A/dm2, the average grain size of the pulse reverse deposit is smaller than that of the pulse deposit at the same positive pulse current, and the microhardness of the pulse reverse deposit is improved compared with that of the pulse deposit. Pulse reverse current microelectroforming may be applied to synthesise refined nanocrystalline metal microstructures.
Keywords :
crystal microstructure; current density; electroforming; grain size; microhardness; nanofabrication; nanostructured materials; nickel; Ni; average grain size; microhardness; nanocrystalline metal deposits; nanocrystalline metal microstructures; nanocrystalline nickel deposits; positive current density; positive pulse current; pulse reverse microelectroforming;
Journal_Title :
Micro & Nano Letters, IET
DOI :
10.1049/mnl.2010.0037
