Experimental investigation of electrodeposited Ni-Al2O3/ZrO2 nano composite on HSLA ASTM A860 alloy

2021 ◽  
Author(s):  
Chandrasekhara Sastry Chebiyyam ◽  
Pradeep N ◽  
Shaik AM ◽  
Hafeezur Rahman A ◽  
Sandeep Patil
Keyword(s):  
Grain Size ◽  
Corrosion Resistance ◽  
Composite Coating ◽  
Base Alloy ◽  
Composite Coatings ◽  
Nano Particles ◽  
Alloy Sample ◽  
Nano Composite ◽  
Nano Coating ◽  
Nano Composite Coating

Abstract Nano composite coatings on HSLA ASTM A860 alloy, adds to the barrier efficacy by increase in the microhardness, wear and corrosion resistance of the substrate material. Additionally, reduction of delamination of the nano composite coating sample is ascertained. Ball milling is availed to curtail the coating samples (Al2O3/ZrO2) to nano size, for forming a electrodeposited product on the substrate layer. The curtailment in grain size was ascertained to be 17.62% in Ni-Al2O3/ZrO2 nano composite coating. During the deposition process, due to the presence of Al2O3/ZrO2 nano particles an increase in cathode efficiency is ascertained. An XRD analysis of the nano composite coating indicates a curtailment in grain size along with increase in the nucleation sites causing a surge in the growth of nano coating layer. In correlation to uncoated HSLA ASTM A36 alloy sample, a surge in compressive residual stress by 47.14%, reduction of waviness by 32.14% (AFM analysis), upsurge in microhardness by 67.77% is ascertained in Ni-Al2O3/ZrO2 nano composite coating. Furthermore, in nano coated Ni-Al2O3/ZrO2 composite a reduction is observed pertaining to weight loss and friction coefficients by 27.44% and 13% in correlation to plain uncoated alloy respectively. A morphology analysis after nano coating indicates, Ni-Al2O3/ZrO2 particles occupy the areas of micro holes, reducing the wide gaps and crevice points inside the matrix of the substrate, enacting as a physical barrier to upsurge the corrosion resistance by 67.72% in correlation to HSLA ASTM A860 base alloy.

Preparation and Study of Novel Nano-Composite Coatings on the Surface of Plastic Moulds

2011 ◽  
Vol 311-313 ◽  
pp. 344-347
Author(s):  
Qian Wang
Keyword(s):  
Corrosion Resistance ◽  
Composite Coating ◽  
Composite Coatings ◽  
Metal Corrosion ◽  
Coating Materials ◽  
Nano Composite ◽  
Optimal Amount ◽  
Wear And Corrosion ◽  
Nano Composite Coating ◽  
Wear And Corrosion Resistance

Compared with ordinary coatings, nano-composite coating usually has a higher hardness and better wear and corrosion resistance. As coating materials, the nano-CeO2/Zn composites were prepared by nano-CeO2 and Zn powder. The microstructure was investigated by XRD and FESEM. The corrosion resistance and hardness of nano-CeO2/Zn composites with different amount of nano-CeO2 were comparatively studied. The results show that the metal corrosion resistance, hardness and density of the composites may be improved significantly by addition of nano-CeO2, and the optimal amount of nano-CeO2 is 1%.

Microstructure and Performance of Nano-Al2O3/Ni-Co Composite Coatings by Electro-Brush Plating

2012 ◽  
Vol 482-484 ◽  
pp. 2371-2375
Author(s):  
Xiao He Wang ◽  
Bin Shi Xu ◽  
Zhen Feng Hu ◽  
Shi Yun Dong
Keyword(s):  
Surface Morphology ◽  
Composite Coating ◽  
Composite Coatings ◽  
Wear Test ◽  
Nano Particles ◽  
Wear Properties ◽  
Properties Of Coatings ◽  
Nano Composite ◽  
Nano Composite Coating ◽  
Brush Plating

To remanufacture hard chromium-plated workpiece, nano-Al2O3/Ni-Co composite coatings and Ni-Co alloy coatings are developed using electric brush plating technology. Scanning electron microscopy (SEM) and transmission electron microscope (TEM) are used to analyze the surface morphology, phase structure and wear properties of coatings. The surface morphology of nano-composite coating is more compact. The nano-particles are well-distributed in the coating and bounded tightly with the substrate. The hardness of composite coating is HV1027, increased approximately 38% compared with Ni-Co alloy coating, overtaking the hard chrome plating. The results of sliding wear test shows that the nano-composite coating reduces friction coefficient, increases wear resistance significantly and exceeds the chromium plating.

Forming Mechanism of Composite Coating with Nano-Particles and its Wear Resistance

2013 ◽  
Vol 281 ◽  
pp. 500-504 ◽  
Author(s):  
Xue Song Li ◽  
Long Sheng He ◽  
You Yang
Keyword(s):  
Composite Coating ◽  
Composite Coatings ◽  
Pure Copper ◽  
Copper Substrate ◽  
Nano Particles ◽  
Nano Composite ◽  
Forming Mechanism ◽  
Nickel Coatings ◽  
Electrodeposited Nickel ◽  
Nanometer Particles

Ni-SiC nano composite coatings were prepared on pure copper substrate. The surface morphology and distribution of nanometer particles of the composite coatings were observed by scanning electron microscope (SEM), micro-hardness of coatings was tested by HXD-1000 microharder. The results showed that microstructure of Ni-SiC nano composite coating is different from that of electrodeposited nickel coatings. Its electrodepositing process abided by the principal of adsorption. By adding nanometer particles, the structure of composite coatings can be effectively fined, microhardness of composite coatings is improved apparently by comparing with that of electrodeposited nickel coatings. Abrasion resistance of Ni-SiC nano composite coatings is excellent.

Effects of Current Density on the Microstructure and Properties of Electrodeposited Black Cr-C Nano-Composite Coatings on Steel Substrate

2011 ◽  
Vol 687 ◽  
pp. 641-646 ◽  
Author(s):  
Xue Song Li ◽  
Yue Yang ◽  
You Yang ◽  
Hua Wu
Keyword(s):  
Composite Coating ◽  
Current Density ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Scanning Electronic Microscopy ◽  
Electronic Microscopy ◽  
Particle Content ◽  
Nano Composite ◽  
X Ray ◽  
Nano Composite Coating

Eelectrodeposited black Cr-C nano-composite coating was prepared on the steel substrate and the effects of current density on the properties of the composite coating were studied in the present paper. The surface morphology and phase composition of the composite coatings were analyzed by means of scanning electronic microscopy (SEM) and X-ray diffractometer (XRD). Microhardness was determined by micrometer and the wear resistance of the coatings was evaluated by CETR using a universal materials tester (UMT). The results showed that formed under the condition of current density of 100A/dm2, temperature of 15°C, and the optimum particle content in electrolyte was 10g/l. The maximum microhardness of black Cr-C nano-composite coating was 10.8 Gpa, simutaneously, the wearing resistance of the coating improved significantly compared to the steel substrate.

scholarly journals Comparison of CrN, AlN and TiN Diffusion Barriers on the Interdiffusion and Oxidation Behaviors of Ni+CrAlYSiN Nanocomposite Coatings

Crystals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1333
Author(s):  
Lijuan Zhu ◽  
Chun Feng ◽  
Shenglong Zhu ◽  
Fuhui Wang ◽  
Juntao Yuan ◽  
...  
Keyword(s):  
Composite Coating ◽  
Oxidation Resistance ◽  
Diffusion Barrier ◽  
Composite Coatings ◽  
Single Layer ◽  
Film Structure ◽  
Diffusion Barriers ◽  
Vacuum Arc ◽  
Nano Composite ◽  
Nano Coating

CrN, AlN, TiN layer were prepared as diffusion barriers between the K417 substrate and Ni+CrAlYSiN nano composite coatings via vacuum arc evaporation. Oxidation kinetics and microstructure evaluation of these nano coating systems at 1000 °C after 100 h were studied. Results show that the AlN layer showed good thermodynamic stability, effectively inhibited the interdiffusion between the coating and the substrate, improved the oxidation resistance of Ni+CrAlYSiN nano composite coatings, and a single-layer Al2O3 film was formed on the coating. The CrN layer was decomposed, which did not block the diffusion of elements and had little effect on the oxidation resistance of the Ni+CrAlYSiN nano composite coating. The TiN layer effectively prevented the interdiffusion between the coating and the substrate. However, it deteriorated the oxidation resistance of the composite coating. Similar to the Ni+CrAlYSiN coating without a diffusion barrier, a double-layer oxide film structure with Al2O3 as the inner layer and Ni(Al,Cr)2O4 as the outer layer formed on the Ni+CrAlYSiN nano composite coatings with the CrN or TiN diffusion barrier.

Properties of Pulse Plating Ni-SiC Nano-Composite Coating

2011 ◽  
Vol 291-294 ◽  
pp. 228-232
Author(s):  
Ji Qun Zhang ◽  
Hui Ming Jin ◽  
Ji Cheng Gao ◽  
Jun Shi ◽  
Lu Li
Keyword(s):  
Grain Size ◽  
Electron Microscope ◽  
Composite Coating ◽  
Nickel Coating ◽  
Pure Nickel ◽  
Nano Composite ◽  
Composite Plating ◽  
Transmission Electron ◽  
Nano Composite Coating ◽  
Scanning Electron

A Ni-SiC nano-composite plating coating was prepared by using composite plating technology adding nano-SiC in the bath.Then the surface morphology was examined by scanning electron microscope (SEM), the transmission electron microscope (TEM) was used to study the grain size,the porosity, corrode-resistant, combines intensity and wearability of the composite plating coating were also tested and contrasted the result with the pure nickel coating. The results shows the surface of Ni-SiC composite coating are more uniform and compact for the adding of nano-Sic refined the grain, the wear resistance,microhardness and corrosion resistance of the composite coating are also significantly improved.

scholarly journals Electrodeposition and Corrosion Resistance Properties of Zn-Ni/TiO2Nano composite Coatings

2011 ◽  
Vol 2011 ◽  
pp. 1-4 ◽  
Author(s):  
B. M. Praveen ◽  
T. V. Venkatesha
Keyword(s):  
Corrosion Resistance ◽  
Composite Coating ◽  
Composite Coatings ◽  
Salt Spray ◽  
Sol Gel ◽  
Steel Plates ◽  
Nano Particles ◽  
Average Crystalline Size ◽  
Fine Grain ◽  
Diffraction Patterns

Nano sized TiO2particles were prepared by sol-gel method. TiO2nano particles were dispersed in zinc-nickel sulphate electrolyte and thin film of Zn-Ni-TiO2composite was generated by electrodeposition on mild steel plates. The effect of TiO2on the corrosion behavior and hardness of the composite coatings was investigated. The film was tested for its corrosion resistance property using electrochemical, weight loss, and salt spray methods. The paper revealed higher resistance of composite coating to corrosion. Microhardness of the composite coating was determined. Scanning electron microscope images and X-ray diffraction patterns of coating revealed its fine-grain nature. Average crystalline size of the composite coating was calculated. The anticorrosion mechanism of the composite coating was also discussed.

scholarly journals Fabrication of Wear Resistance Ni/SiC nano composite Coating by Electro co-deposition

2021 ◽  
Vol 2114 (1) ◽  
pp. 012077
Author(s):  
N Salam ◽  
M A. Jaleel
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Wear Behavior ◽  
Composite Coatings ◽  
Nano Composite ◽  
Sic Nanoparticles ◽  
Electro Deposition ◽  
Nano Composite Coating ◽  
Disk Test ◽  
Deposition Conditions

Abstract In this paper, we succeeded in obtaining a Ni/SiC nano composite coating using conventional electro deposition by adding different amount of SiC nanoparticles to a nickel-watt bath to be co-deposited. The effect of electro deposition conditions was studied by changing the amount of SiC nanoparticles in the nano composite, and the deposition current density which affects on the participation of SiC nanoparticles in the coating. The morphology and mechanical properties of the electrodeposited nano-composite were studied. The wear behavior of the nano-composite coatings was evaluated on a ball-on-disk test. It was found that the increased micro hardness and wear resistance of the nano-composite coatings increased with increasing content of the SiC nano-particulate in bath.

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