Ni-TiN Composite Coatings Prepared by Ultrasonic-Magnetic-Electrodeposition

Ni-TiN; Composite coating; Ultrasonic-magnetic-electrodeposition Abstract: In this paper, Ni-TiN composite coatings were prepared by ultrasonic-magnetic- electrodeposition. The optimum parameters were achieved by experiments and analysis. The structure of Ni-TiN coatings was observed using HRTEM. And the wear resistance was tested by the grinding machine. The results illuminated that the optimum technical parameters prepared Ni-TiN coatings are TiN particle concentration 4g/L, ultrasonic power 200W, magnetic intensity 0.6T, current density 5A/dm2, temperature of the electrolyte 50°C, pH 4.5. The HRTEM showed that the diameter of Ni grains and TiN particle in Ni-TiN coatings were about 60nm and less than 40nm, respectively.

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Study on Electrodeposition of Ni-Graphite Composite Coatings in Sulfamate Bath

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.150-151.1546 ◽

2010 ◽

Vol 150-151 ◽

pp. 1546-1550 ◽

Cited By ~ 3

Author(s):

Xiang Zhu He ◽

Xiao Wei Zhang ◽

Xin Li Zhou ◽

Zhi Hong Fu

Keyword(s):

Surface Morphology ◽

Process Parameters ◽

Current Density ◽

Graphite Particle ◽

Particle Concentration ◽

Composite Coatings ◽

Nickel Matrix ◽

Graphite Composite ◽

Surface Morphologies ◽

Sulfamate Bath

This paper presented the composite coatings of nickel with graphite particle on the aluminum substrate using a nickel sulfamate bath. Effects of graphite particle concentration on the surface morphologies of the composite coatings were investigated. The inclusion of graphite particle into metal deposits was dependent on many process parameters, including particle concentration, current density, pH and temperature. Results of SEM and XRD demonstrated that graphite particle had successfully deposited on that nickel matrix; besides, the surface morphology of coatings obtained from sulfamate bath containing 2g/L graphite particle dispersed more uniformly than the ones with higher concentration.

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Effect of Current Density on the Performance of Ni–P–ZrO2–CeO2 Composite Coatings Prepared by Jet-Electrodeposition

Coatings ◽

10.3390/coatings10070616 ◽

2020 ◽

Vol 10 (7) ◽

pp. 616

Author(s):

Zhaoyang Song ◽

Hongwen Zhang ◽

Xiuqing Fu ◽

Jinran Lin ◽

Moqi Shen ◽

...

Keyword(s):

Wear Resistance ◽

Corrosion Resistance ◽

Current Density ◽

Composite Coatings ◽

Electrochemical Corrosion ◽

Corrosion Current ◽

X Ray Diffraction ◽

X Ray ◽

Jet Electrodeposition ◽

Electrochemical Corrosion Resistance

The objective of this study was to improve the surface properties, hardness, wear resistance and electrochemical corrosion resistance of #45 steel. To this end, Ni–P–ZrO2–CeO2 composite coatings were prepared on the surface of #45 steel using the jet-electrodeposition technique by varying the current density from 20 to 60 A/dm2. The effect of current density on the performance of the composite coatings was evaluated. Scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) were applied to explore the surface topography, elemental composition, hardness and electrochemical corrosion resistance of the composite coatings. The results showed that with the increase in the current density, the hardness, wear resistance, and electrochemical corrosion resistance tends to increase first and then decrease. At a current density of 40 A/dm2, the hardness reached a maximum of 688.9 HV0.1, the corrosion current reached a minimum of 8.2501 × 10−5 A·cm−2, and the corrosion potential reached a maximum of −0.45957 V. At these values, the performance of the composite coatings was optimal.

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Fabrication and Performance of Ni-Co-P/Si3N4 Electroplated Composite Coatings on Al-Si Alloys

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.377.235 ◽

2013 ◽

Vol 377 ◽

pp. 235-239

Author(s):

Yun Li ◽

Liang Fang ◽

Wei Dong Shen ◽

Sheng Chun Wang ◽

Chun Lan Cao ◽

...

Keyword(s):

Wear Resistance ◽

Electric Current ◽

Current Density ◽

Composite Coatings ◽

Adhesive Force ◽

Optical Microscope ◽

Electric Current Density ◽

Electro Deposition ◽

X Ray ◽

Hardness Tester

In order to improve the wear resistance of Al-Si alloys, the electro deposition of Ni-Co-P/Si3N4coating on a hypereutectic Al-Si casting alloy was studied in this paper. The thickness, hardness, surface morphology, composition, adhesive force and wear resistance of Ni-Co-P/Si3N4coating were measured by optical microscope, micro-hardness tester, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), adhesive attraction scratcher and abrasion tester. It was shown that Si3N4particulates were uniformly distributed in the composite coating. And the effect of process parameters, such as electric current density, temperature, PH, plating time and component of electroplating bath,were obtained. The wear resistance of the coating was improved with the increase of hardness and the content of Si3N4in the coating. It was also improved by decreasing electric current density. The adhesion of the coating was poor for increasing the content of P and Co in the coating. At the same time, the coating was hard, friable, and easy to be broken with the decrease of temperature.

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ELECTRIDEPOSITION AND WEAR BEHAVIOR OF NANO-STRUCTURED Cr-WC COMPOSITE COATINGS FROM A TRIVALENT CHROMIUM BATH

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194512002693 ◽

2012 ◽

Vol 05 ◽

pp. 737-743 ◽

Cited By ~ 1

Author(s):

A. AMADEH ◽

S. NADALI ◽

S.M. LARI BAGHAL ◽

H. MORADI

Keyword(s):

Wear Resistance ◽

Current Density ◽

Duty Cycle ◽

Wear Behavior ◽

Composite Coatings ◽

Sodium Dodecyl ◽

Trivalent Chromium ◽

Sodium Saccharin ◽

Average Size ◽

Pin On Disk

Electrodeposition of nano-structured Cr - WC had been carried out from a trivalent chromium bath using a square shaped pulse current. The average size of WC particles was 70 nm. The effect of sodium saccharin and sodium dodecyl sulfate (SDS) additives as well as pulse electroplating parameters such as current density, duty cycle and frequency on the amount of incorporated WC particles and morphology of the coatings was investigated. The structure and morphology of the coatings were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. In addition, the hardness and tribological behavior of the coatings were investigated by microhardness and pin on disk methods, respectively. The results showed that although the addition of saccharin and SDS decreased the amount of WC particles in the coating, but reduced the size of WC agglomerates which, in turn, increased the wear resistance of the coatings. Also, the optimum wear resistance was achieved at the current density of 8 A/dm2, duty cycle of 50% and frequency of 10 Hz.

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The Study of Corrosion and Wear Resistance of Copper Composite Coatings with Inclusions of Carbon Nanomaterials in the Copper Metal Matrix

Materials Science ◽

10.5755/j01.ms.17.2.481 ◽

1970 ◽

Vol 17 (2) ◽

pp. 132-139 ◽

Cited By ~ 2

Author(s):

Viktorija MEDELIENĖ ◽

Vojtech STANKEVIČ ◽

Asta GRIGUCEVIČIENĖ ◽

Aušra SELSKIENĖ ◽

Gedvidas BIKULČIUS

Keyword(s):

Wear Resistance ◽

Current Density ◽

Polarization Resistance ◽

Acidic Medium ◽

Carbon Nanomaterials ◽

Composite Coatings ◽

Pure Copper ◽

Corrosion Current ◽

Corrosion Products ◽

Copper Composite

This paper deals with the peculiarities of the behaviour of copper nanocomposite coatings with CNMs inclusions under the free corrosion conditions in the acidic medium. The parameters of corrosion current density (jcorr), anodic dissolution current density (ia) and polarization resistance (Rp) have been determined. In the acidic medium a stronger oxidation of nanostructured copper nanocomposites occurred. With longer immersion periods more corrosion products are formed, resulting in a increase in the polarization resistance (Rp) of corrosion. Corrosion products cover the whole surface of the coatings and the corrosion rate (jcorr) tends towards a steady value of 1.7×10-3 ¸ 2.1×10-3 A·cm-2 for all copper coatings studied: 1.7×10-3 A·cm-2 for both Cu and Cu-CNM1, 1.9×10-3 A·cm-2 - for Cu-CNM2 and 2.1×10-3 A·cm-2 - for Cu-CNM3 composite coatings. It has been established that nanocomposites possess a higher wear resistance as compared to that of pure copper. The damage of metal characterized as a depth scar (đ) is lower. The roughness of the composites studied was found to be the essential factor affecting their wear resistance. Therefore, the wear resistance of nanocomposites is impaired when they are deposited on a hard steel substrate.http://dx.doi.org/10.5755/j01.ms.17.2.481

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APPLICATION OF BACK-PROPAGATION NEURAL NETWORKS FOR CORROSION BEHAVIOR ESTIMATION OF Ni-TiN COATINGS FABRICATED THROUGH PULSE ELECTRODEPOSITION

Surface Review and Letters ◽

10.1142/s0218625x18501548 ◽

2019 ◽

Vol 26 (03) ◽

pp. 1850154

Author(s):

DONGJIE GUO ◽

YUBING HAN ◽

CHUNYANG MA ◽

WANYING YU ◽

FAFENG XIA ◽

...

Keyword(s):

Neural Network ◽

Neural Network Model ◽

Current Density ◽

Bp Neural Network ◽

Particle Concentration ◽

Back Propagation ◽

Pulse Frequency ◽

Weight Losses ◽

Tin Coatings ◽

Bp Neural Network Model

In this paper, back-propagation (BP) neural network model with 8 hidden layers and 10 neurons was utilized to estimate corrosion behaviors of Ni-TiN coatings, deposited through pulse electrodeposition. Effects of plating parameters, namely, pulse frequency, TiN concentration and current density, on Ni-TiN coatings weight losses were discussed. Results indicated that pulse frequency, TiN concentration and current density had significant effects on weight losses of Ni-TiN coatings. Maximum mean square error of BP model was 9.10%, and this verified that the BP neural network model could accurately estimate corrosion behavior of Ni-TiN coatings. The coating fabricated at pulse frequency of 500[Formula: see text]Hz, TiN particle concentration of 8[Formula: see text]g/L and current density of 4[Formula: see text]A/dm2 consisted of fine grains and compact oxides, demonstrating that the coating displayed best corrosion resistance in this corrosion test. Concentrations of Ti and Ni in Ni-TiN coating prepared at pulse frequency of 500[Formula: see text]Hz, TiN particle concentration of 8[Formula: see text]g/L and current density of 4[Formula: see text]A/dm2 were 18.6[Formula: see text]at.% and 55.4[Formula: see text]at.%, respectively.

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Tribological Properties of Multi-Walled Carbon Nanotube-Cr and Graphene Oxide-Cr Composite Coating

Journal of Tribology ◽

10.1115/1.4043066 ◽

2019 ◽

Vol 141 (5) ◽

Cited By ~ 2

Author(s):

Bo Chen ◽

Shenghu Liang ◽

Song Lu ◽

Kun Zou ◽

Yitian Peng ◽

...

Keyword(s):

Wear Resistance ◽

Graphene Oxide ◽

Carbon Nanotube ◽

Composite Coating ◽

Tribological Properties ◽

Current Density ◽

Composite Coatings ◽

Friction Reduction ◽

Multi Walled Carbon Nanotube ◽

Cr Coating

Chromium (Cr)-based coatings have been widely used to strengthen the friction reduction and wear resistance on various kinds of surface. Here, the stable aqueous dispersion of oxidized multi-walled carbon nanotube (MWCNT) and graphene oxide nanosheets (GOS) was obtained by ultrasonic oxidation treatment. Then, MWCNT-Cr and GOS-Cr composite coatings were prepared using the direct current electrochemical co-deposition process on 420 stainless steel in the electrolyte with the addition of MWCNT and GOS under different current density and temperature. The morphology, structure, hardness and tribological properties of MWCNT-Cr and GOS-Cr composite coating are comparatively studied using pure Cr coating as a baseline. The friction reduction performance of MWCNT-Cr and GOS-Cr composite coatings was improved at optimum current density and temperature. The anti-wear properties of MWCNT-Cr and GOS-Cr composite coatings were enhanced by uniform embedment of MWCNT and GOS in coatings increasing the hardness and lubricity. This study suggests that the introduction of oxidized MWCNT and GOS with good dispersion could enhance the wear resistance and friction reduction of pure Cr coating due to their excellent dispersion, mechanical, and lubricant properties.

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