Effect of Current Density on the Microstructure and Hardness of Ni–CeO2 Nanocomposite Coating Synthesized by Pulse Electrodeposition Technique

2010 ◽  
Vol 10 (12) ◽  
pp. 8217-8226 ◽  
Author(s):  
Ranjan Sen ◽  
Siddhartha Das ◽  
Karabi Das
Keyword(s):  
Current Density ◽  
Nanocomposite Coating ◽  
Pulse Electrodeposition ◽  
Electrodeposition Technique

Preparation of Ni-ZrO2-CeO2 Nanocomposite Coatings by Pulse Electrodeposition

2013 ◽  
Vol 395-396 ◽  
pp. 174-178 ◽  
Author(s):  
Yang Yang Xu ◽  
Yu Jun Xue ◽  
Fang Yang ◽  
Chun Yang Liu ◽  
Ji Shun Li
Keyword(s):  
Current Density ◽  
Smooth Surface ◽  
Pulse Current ◽  
Nanocomposite Coating ◽  
Pulse Electrodeposition ◽  
Nanocomposite Coatings ◽  
Duty Ratio ◽  
Average Current Density ◽  
Average Current ◽  
Surface Morphologies

Ni-ZrO2-CeO2nanocomposite coatings were prepared by pulse electrodeposition. The effect additions of ZrO2and CeO2nanoparticles, average current density, duty ratio and frequency of pulse current on nanoparticle contents of Ni-ZrO2-CeO2nanocomposites were studied. The surface morphologies and microhardness of different nanocomposite coatings (Ni-ZrO2, Ni-CeO2, Ni-ZrO2-CeO2) were analyzed. The results show that, with the average current density, duty ratio and frequency increased, the nanoparticle contents increased at first and then decreased. Compared with Ni-ZrO2and Ni-CeO2, the surface morphology of Ni-ZrO2-CeO2nanocomposite coating showed better smooth surface and more compact microstructure, the microhardness was also higher.

Effect of Pulse Electrodeposition Parameters on Microhardness of Ni-ZrO2-CeO2 Nanocomposite Coating

2014 ◽  
Vol 1049-1050 ◽  
pp. 31-34
Author(s):  
Shuang Shuang Liu ◽  
Yu Jun Xue ◽  
Yang Yang Xu ◽  
Ji Shun Li
Keyword(s):  
Composite Coating ◽  
Current Density ◽  
Pulse Current ◽  
Pulse Frequency ◽  
Nanocomposite Coating ◽  
Pulse Electrodeposition ◽  
Duty Ratio ◽  
Positive Duty ◽  
Average Current Density ◽  
Average Current

Ni-ZrO2-CeO2 nanocomposite coating was prepared by pulse electrodeposition. The effect of addition of ZrO2 and CeO2 nanoparticles, average current density, duty cycle and pulse current on microhardness of Ni-ZrO2-CeO2 nanocomposites were studied. The results show that microhardness of nanocomposite is increased at first and then decreased with the increasing additive amounts of two kinds of nanoparticles. With increasing reverse the average current density, the microhardness of the composite coating increases. Also, the microhardness of nanocomposite fall with the increasing of pulse frequency. With the positive duty ratio increasing, the microhardness of the composite coating increase at first and then decreased, but with the increasing of the reverse duty ratio, the microhardness of nanocomposite coating is gradually decreased.

CdSe Thin Film Preparation by Unipolar Current Pulse Electrodeposition Technique

2005 ◽  
Vol 865 ◽  
Author(s):  
Kiran Jain ◽  
N. Karar ◽  
H. Chandra
Keyword(s):  
Grain Size ◽  
Current Pulse ◽  
Current Density ◽  
Pulse Electrodeposition ◽  
Electrodeposition Technique ◽  
Cdse Thin Film ◽  
Wide Range ◽  
Thin Film Preparation ◽  
Film Preparation ◽  
Off Time

AbstractCdSe thin films were prepared using unipolar current pulse electrodeposition technique on fluorine doped SnO2 coated glass plates. The electrodeposition bath consisted of aqueous solution including CdSO4, SeO2 and pH was adjusted using H2SO4. Growth of CdSe was accomplished under wide range of variables like current density, pulse on and off time in order to elucidate the effect on crystalline structure, grain size and optical properties. A low current density and increased off time favored grain orientation and crystallinity. Increased current density and on time favored grain size reduction.

Preparation of Zn-ZrO2 Nanocomposite Coating by DC and Pulsed Current Electrodeposition Technique with Low Current Density

2015 ◽  
Vol 827 ◽  
pp. 332-337
Author(s):  
Asep Ridwan Setiawan ◽  
Marsetio Noorprajuda ◽  
Aditianto Ramelan ◽  
Rochim Suratman
Keyword(s):  
Surface Morphology ◽  
Current Density ◽  
Erosion Resistance ◽  
Pulse Current ◽  
Copper Substrate ◽  
Nanocomposite Coating ◽  
Nanocomposite Coatings ◽  
Phase Identification ◽  
Pulsed Current ◽  
Electrodeposition Technique

In the present work, Zn-ZrO2 nanocomposite coatings were deposited on the copper substrate through DC and pulse electrodeposition technique with low current density (10 mA/cm2). The effect addition of ZrO2 nanoparticles and pulse current were studied. The surface morphology, microhardness and erosion resistance of Zn-ZrO2 nanocomposite coating were evaluated. The result shows that, with the addition of ZrO2 particles, the surface morphology of Zn-ZrO2 nanocomposite coating was smoother. Phase identification by XRD confirm that Zn layer had been sucessfully deposited. The presence of ZrO2 nanoparticles was not detected. Compared to DC, pulsed current electrodeposition technique showed higher cathodic efficiency, better microhardness and good erosion resistance.

Preparation of Pulse Electrodeposited Mo-Ni Coating

2014 ◽  
Vol 971-973 ◽  
pp. 161-164
Author(s):  
Xiao Zhen Liu ◽  
Le Tian Xia ◽  
Jian Qiang Gen ◽  
Xiao Zhou Liu ◽  
Jie Chen ◽  
...  
Keyword(s):  
Current Density ◽  
Duty Cycle ◽  
Deposition Temperature ◽  
Deposition Time ◽  
Pulse Electrodeposition ◽  
Electro Deposition ◽  
Electrodeposition Method ◽  
Electrodeposition Time ◽  
Ni Alloy

Mo-Ni coatings were prepared on Ni alloy by pulse electrodeposition method. The effects of current density, electrodeposition temperature, frequency, duty cycle and electrodeposition time on microhardness of Mo-Ni coating were researched, respectively. Microhardness of Mo-Ni coating increases with the increase of current density, electrodeposition temperature, frequency and electro-deposition time in 17.75 A/dm2 ~ 19.25 A/dm2. 21 °C~ 25 °C, 1000 Hz ~ 5000 Hz and 10 min ~ 20 min, respectively. Microhardness of Mo-Ni coating decreases with the increase of electrodeposition temperature, electrodeposition time and duty cycle in 25 °C ~ 37 °C, 20 min ~ 30 min and 0.5 ~ 0.9, respectively. In the range of current density from 19.25A/dm2 to 20.75 A/dm2, microhardness of Mo-Ni coating is neariy constant with the increase of current density. When electrodeposition parameters: current density 19.25 A/dm2, electro-deposition temperature 25 °C, frequency 5000 Hz, duty cycle 0.5 and electrodeposition time 20 min, microhardness of Mo-Ni coatin is as high as 707.9 HV.

Research on the Corrosion Resistance of Ni-ZrO2 Nanocomposite Coatings

2014 ◽  
Vol 633-634 ◽  
pp. 787-790
Author(s):  
Lin Wang ◽  
Jin Lin Lu ◽  
Cheng Wei Li ◽  
Shu Mei Kang
Keyword(s):  
Corrosion Resistance ◽  
Current Density ◽  
Composite Coatings ◽  
Process Condition ◽  
Corrosion Current ◽  
Bath Temperature ◽  
Nanocomposite Coating ◽  
Test Method ◽  
Optimum Process ◽  
Orthogonal Test Method

In order to improve the corrosion resistance of Ni-nanoZrO2 composite coatings. By orthogonal test method,the process for composite electroplating of Ni-ZrO2 was optimized involved current density、bath temperature、the ZrO2 particle concentration. Corrosion resistance and the hardness were tested, microstructure was observed with a scanning electron microscope. The optimized technological conditions are:current density i4A/dm2,bath temperature 45°C, nanoZrO2 addition 7g/L. In this optimum process condition, corrosion current density is 6.186×10-6 A/cm2, corrosion resistance is good, and its hardness is much better than pure nickel plating, also a flat morphology and compact microstructure Ni-ZrO2 nanocomposite coating is get.

Novel bilayer Zn Ni/Ni Co SiC nanocomposite coating with exceptional corrosion and wear properties by pulse electrodeposition

2018 ◽  
Vol 738 ◽  
pp. 394-404 ◽  
Author(s):  
Saptarshi Das ◽  
Swastika Banthia ◽  
Arghya Patra ◽  
Srijan Sengupta ◽  
Shiv Brat Singh
Keyword(s):  
Nanocomposite Coating ◽  
Corrosion And Wear ◽  
Pulse Electrodeposition ◽  
Wear Properties
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