Pulse electrodeposition of nanocrystalline nickel using ultra narrow pulse width and high peak current density

2003 ◽  
Vol 168 (2-3) ◽  
pp. 123-128 ◽  
Author(s):  
N.S Qu ◽  
D Zhu ◽  
K.C Chan ◽  
W.N Lei
Keyword(s):  
Current Density ◽  
Pulse Width ◽  
High Peak ◽  
Pulse Electrodeposition ◽  
Nanocrystalline Nickel ◽  
Peak Current Density ◽  
Peak Current

THE EFFECT OF PREPARED PARAMETERS ON THE MICROSTRUCTURE OF ELECTRODEPOSITED NANOCRYSTALLINE NICKEL COATING

2004 ◽  
Vol 11 (04n05) ◽  
pp. 433-442 ◽  
Author(s):  
C. Y. DAI ◽  
Y. PAN ◽  
S. JIANG ◽  
Y. C. ZHOU
Keyword(s):  
Grain Size ◽  
Surface Morphology ◽  
Current Density ◽  
Crystal Orientation ◽  
Nickel Coating ◽  
Pulse Frequency ◽  
Lattice Parameter ◽  
Nanocrystalline Nickel ◽  
Peak Current Density ◽  
Peak Current

The nanocrystalline nickel coating was synthesized by pulse-jet electrodeposition from modified Watts bath. Pulse and jet plating was employed to increase the deposition current density, decrease diffusion layer, increase the nucleation rate and in this case the prepared method would result in fine-grained deposits. Transmission and scanning electron microscopy and X-ray diffraction (XRD) were used to study the microstructure, the surface morphology, the crystal preferred orientation and the variety of the lattice parameter respectively. The influence of pulse parameters, namely peak current density, the duty cycle and pulse frequency on the grain size, surface morphology, crystal orientation and microstructure was studied. The results showed that with increasing peak current density, the deposit grain size was found to decrease markedly in other parameters at constant. However, in our experiment it was found that the grain size increased slightly with increasing pulse frequency. For higher peak current density, the surface morphology was smoother. The crystal orientation progressively changed from an almost random distribution to a strong (111) texture. This means that the peak current density was the dominated parameter to effect the microstructure of electrodeposited nanocrystalline nickel coating. In addition, the lattice parameter for the deposited nickel is calculated from XRD and it is found that the calculated value is less than the lattice parameter for the perfect nickel single crystal. This phenomenon is explained by the crystal lattice mismatch.

Sub-micron InGaAs Esaki diodes with record high peak current density

2010 ◽  
Author(s):  
D. Pawlik ◽  
M. Barth ◽  
P. Thomas ◽  
S. Kurinec ◽  
S. Mookerjea ◽  
...  
Keyword(s):  
Current Density ◽  
High Peak ◽  
Peak Current Density ◽  
Peak Current

Resonant interband tunnelling diode with high peak current density

1997 ◽  
Vol 33 (1) ◽  
pp. 102 ◽  
Author(s):  
H. Kitabayashi ◽  
T. Waho ◽  
M. Yamamoto
Keyword(s):  
Current Density ◽  
High Peak ◽  
Peak Current Density ◽  
Peak Current
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