Parameter optimization and wear characteristics of nano CuO/Ni composite coating by brush plating technique

2019 ◽  
Vol 234 (2) ◽  
pp. 292-300
Author(s):  
YP Vaishnu ◽  
K Bindu Kumar ◽  
S Rani
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Composite Coating ◽  
Process Parameters ◽  
Fine Particles ◽  
Orthogonal Experiment ◽  
Composite Coatings ◽  
Wear Loss ◽  
Brush Plating

The development of deposition of different metal processes established on electrodeposition of nickel, different alloy and composite coatings on different surfaces has attested an upsurge in interest among researchers. In latter years, these coatings have exhibited promising corrosion and wear resistance properties. Also, huge number of modern developments became most critical from macro to nano level applications. It is well known that one may shape the microstructure and the phase present in the material to recover the mechanical properties of highly pure materials, specifically metals. Co-deposition of fine particles inside a metal matrix to generate composite coatings has treated as a practical strategy to acquire enhanced mechanical properties like wear resistance, corrosion resistance and lubrication. In this work, CuO/Ni composite coatings are processed on the small cylindrical pin by electro brush plating to evaluate the wear and corrosion resistance. To examine the effects about the different parameters of processes on wear loss of CuO/Ni composite coating, L16(44) orthogonal experiment is designed and conducted with four process parameters (voltage, concentration of nanoCuO particles in g/l, temperature and thickness) which are selected as factors. Design of experiment is employed to resolve the effects of process parameters on the wear loss of composite coatings. It is concluded that concentration of CuO nanoparticle and voltage are the most significant factors for the wear loss.

scholarly journals Improving the microstructure and mechanical properties of laser cladded Ni-based alloy coatings by changing their composition: A review

2020 ◽  
Vol 59 (1) ◽  
pp. 340-351
Author(s):  
Lin Yinghua ◽  
Ping Xuelong ◽  
Kuang Jiacai ◽  
Deng Yingjun
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
Rare Earth ◽  
Composite Coatings ◽  
Single Element ◽  
Properties Of Coatings ◽  
Hard Particles ◽  
Microstructure And Mechanical Properties ◽  
Nickel Based Alloy

AbstractNi-based alloy coatings prepared by laser cladding has high bonding strength, excellent wear resistance and corrosion resistance. The mechanical properties of coatings can be further improved by changing the composition of alloy powders. This paper reviewed the improved microstructure and mechanical properties of Ni-based composite coatings by hard particles, single element and rare earth elements. The problems that need to be solved for the particle-reinforced nickel-based alloy coatings are pointed out. The prospects of the research are also discussed.

Microstructural characteristics of SiC-B4C reinforced laser alloying composite coatings

2013 ◽  
Vol 20 (4) ◽  
pp. 307-310
Author(s):  
Li Wei
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Fine Particles ◽  
Composite Coatings ◽  
Substrate Surface ◽  
Laser Alloying ◽  
Wear Process ◽  
High Microhardness ◽  
Deep Plowing ◽  
Coating Matrix

AbstractA hard SiC-B4C reinforced composite coating was fabricated by laser alloying of SiC-B4C+Al-Sn-Mo-Y2O3 mixed powders on a Ti-3Al-2V alloy. Al-Sn-Mo mixed powders were first used in the laser alloying technique to improve the wear resistance of titanium alloys. Proper selection of the laser alloying process parameters allows us to obtain a composite coating with a metallurgical combination with substrate. Under the action of Mo, fine particles with high microhardness were produced in the coating matrix and also hindered the formation of adhesion patches and deep plowing grooves during the sliding wear process, leading to the improvement of wear resistance of a titanium alloy substrate surface.

scholarly journals Composite Coatings of Chromium and Nanodiamond Particles on Steel

2017 ◽  
Vol 62 (4) ◽  
pp. 2421-2424 ◽  
Author(s):  
N. Gidikova ◽  
M. Sulowski ◽  
V. Petkov ◽  
R. Valov ◽  
G. Cempura
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Composite Coating ◽  
Composite Coatings ◽  
Machine Building ◽  
Chromium Coating ◽  
Detonation Synthesis ◽  
Micro Structure ◽  
X Ray ◽  
Average Size

AbstractChrome plating is used to improve the properties of metal surfaces like hardness, corrosion resistance and wear resistance in machine building. To further improve these properties, an electrodeposited chromium coating on steel, modified with nanodiamond particles is proposed. The nanodiamond particles (average size 4 nm measured by TEM) are produced by detonation synthesis (NDDS). The composite coating (Cr+NDDS) has an increased thickness, about two times greater microhardness and finer micro-structure compared to that of unmodified chromium coating obtained under the same galvanization conditions. In the microstructure of specimen obtained from chrome electrolyte with concentration of NDDS 25 g/l or more, “minisections” with chromium shell were found. They were identified by metallographic microscope and X-ray analyser on etched section of chromium plated sample. The object of further research is the dependence of the presence of NDDS in the composite coating from the nanodiamond particles concentration in the chroming electrolyte.

The Relationship between Nanocrystalline Structure and Frictional Properties of Nanodiamond/Ni Composite Coatings by Brush Plating

2011 ◽  
Vol 80-81 ◽  
pp. 683-687 ◽  
Author(s):  
Ying Li ◽  
Bian Xiao Li ◽  
Wen Jun Zou
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Composite Coatings ◽  
Nanocrystalline Structure ◽  
Work Piece ◽  
Reciprocating Motion ◽  
Frictional Properties ◽  
Second Phases ◽  
Brush Plating ◽  
The Relationship

Nanodiamond/Ni and Ni coatings were fabricated via brush plating. Nanocrystalline structure of the composite coating was investigated by SEM and XRD. The results showed that the composite coatings are nanocrystalline structure. The hardness of the nanodiamond/Ni composite coating is higher greatly than that of Ni coating. At same time, the reasons of formation nanocrystalline were discussed, which include the nucleation rate with the increase of a high over-potential, the reciprocating motion between brush and work piece, the heterogeneous nucleation of nanodiamond. The nanodiamonds as second phases make grain finer. The nanodiamonds of core-shell structure play the important role in wear resistance and antifriction. So the wear resistance of the composite coatings is significantly higher than nickel coating’s.

Effects of Heat Treatment on Mechanical Properties of Ni-P-CNT Composite Coating

2015 ◽  
Vol 817 ◽  
pp. 493-497 ◽  
Author(s):  
Qin Shi ◽  
Wan Chang Sun ◽  
Jun Gao ◽  
Ying Wang ◽  
Miao Miao Tian
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Wear Resistance ◽  
Grain Boundary ◽  
Composite Coating ◽  
Friction Pair ◽  
Nanocomposite Coating ◽  
Nitrogen Atmosphere ◽  
Wear Loss ◽  
Strengthening Effect

Ni-P-CNT nanocomposite coating was successfully co-deposited by electroless plating and the heat treatment was carried out at 200°C, 400°C, 600°C in nitrogen atmosphere respectively for a holding period of 1 h. The effects of heat treatment on the microstructure and mechanical properties of Ni-P-CNT composite coating were investigated. The results indicate that the heat treatment at 400°C can greatly improve the hardness and wear resistance of the composite coating. The reason is that Ni3P hard phase is greatly precipitated after the heat treatment, which played a strengthening effect. On the other hand, the precipitated Ni, Ni3P crystalline phases in the coating result in an increase of the amount of grain boundary. The increased amount of grain boundary broke the spread of shear force during friction process, and reduced the wear loss caused by friction pair. Compared with as-deposited coating, the coatings after heat treatment possess higher microhardness and wear resistance.

Microstructure, Corrosion and Wear Resistance of Co-Ni-ZrO2 Composite Coating

2015 ◽  
Vol 817 ◽  
pp. 449-453
Author(s):  
Jun Gao ◽  
Wan Chang Sun ◽  
Qin Shi ◽  
Ying Wang ◽  
Miao Miao Tian
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Alloy Coating ◽  
Corrosion And Wear ◽  
Submicron Particles ◽  
Electrolytic Deposition ◽  
Wear Loss ◽  
Ni Alloy

Co-Ni alloy and ZrO2 submicron particles were successfully co-deposited on carbon steel substrate by direct current electrolytic deposition. The micromorphology, constituent, microhardness, corrosion and wear resistance of the composite coatings were tested, respectively. The results show that the embedded submicron ZrO2 particles are uniformly distributed in the entire Co-Ni matrix and the coating showed a good adhesion to the substrate. The hardness, friction coefficient, wear loss, and electrode voltage of Co-Ni alloy coating were 356 HV, 0.8, 1.901×10-2 mg/m, and-0.47 V, respectively, while those of Co-Ni-ZrO2 composite coating were 413 HV, 0.6, 1.174×10-2 mg/m, and-0.37 V, respectively. The data above suggested that Co-Ni-ZrO2 composite coating possesses higher microhardness, better wear and corrosion resistance.

Research on Effect of Scanning Velocity on Laser Cladding AISI 304 Stainless Steel/Al2O3 Composite Coating

2013 ◽  
Vol 433-435 ◽  
pp. 2054-2057
Author(s):  
Peng Xu ◽  
Cheng Xin Lin ◽  
Xin Peng Yi ◽  
Chao Yu Zhou
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Composite Coating ◽  
Laser Cladding ◽  
Composite Coatings ◽  
304 Stainless Steel ◽  
Wear Loss ◽  
Aisi 304 Stainless Steel ◽  
Scanning Velocity ◽  
Aisi 304

AISI 304 stainless steel powder and Al2O3 powder was used to produce laser cladding composite coatings in order to improve the surface wear resistance of 45 steel. Microstructure of the composite coating was examined and analyzed by metallographic microscope. Microhardness and wear resistance of the composite under different scanning velocities were evaluated. The results show that the composite coating is composed of planar crystal, cellular crystal, dendritic crystal and fine equiaxed; the composite coatings under different technological parameters are made of the same phases, ferrite (α) and austenite (γ) phases. Microhardness of the composite is enhanced along with the increase of scanning velocity; effect of scanning velocity on wear loss of the composite coatings is not significant.

scholarly journals Microstructure and Properties of Cr-Fe2B Composite Coatings Prepared by Pack-Preboronizing Combined with Electro Brush-Plating

Coatings ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 519 ◽  
Author(s):  
Jianjun Hu ◽  
Yaoxin Pei ◽  
Yu Liu ◽  
Xian Yang ◽  
Hui Li ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Annealing Temperature ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Amorphous Structure ◽  
Carbon Steels ◽  
Excellent Thermal Stability ◽  
Microstructure And Properties ◽  
Brush Plating

Cr-Fe2B composite coatings were prepared on carbon steels by pack-boronizing followed by electro brush-plating. The microstructure and properties of the coatings annealed at different temperatures were studied. The coatings show a gradient structure composed of a Cr-layer and a Fe2B-layer and have excellent thermal stability, and no new layers and/or transition layers are formed in the coating during annealing up to 1000 °C. The Cr-layer has an amorphous structure and is transformed into nanosized grains when the annealing temperature increases to 700 °C. As the annealing temperature is further increased, the nanograins grow rapidly. The microcracks in the Cr-layer increase sharply after annealing at 550 °C and then decrease significantly with any further increase of the annealing temperature. The pre-deposited Fe2B-layer prevents the formation of carbon-poor zones in the steel substrate during annealing. It is considered that high-temperature (>700 °C) annealing helps to eliminate coating defects, increase the coating density and obtain better wear resistance and corrosion resistance. Surprisingly, the as-plated and low temperature annealed samples also show good wear resistance and corrosion resistance, which may be related to their amorphous structure and nanocrystalline structure.

scholarly journals Microstructure and Properties of WC/diamond/Co-based Gradient Composite Coatings on High-speed Steel Fabricated by Laser Cladding

2021 ◽  
Author(s):  
Donggang Liu ◽  
Guoxing Liang ◽  
Xinhui Hao ◽  
Yonggui Huang ◽  
Guang Li ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Laser Cladding ◽  
Polarization Resistance ◽  
Alloy Powder ◽  
High Speed ◽  
Composite Coatings ◽  
High Speed Steel ◽  
Wear Loss ◽  
Cladding Layer

Abstract Improving the wear resistance and corrosion resistance of high-speed steel (HSS), WC/diamond/Co-based gradient composite coatings were produced on HSS substrates by laser cladding with different compositions powder mixture (Co-Cr alloy powder, 80Co-Cr alloy powder+20WC, 53Co-Cr alloy powder+40WC+7diamond, wt.%). The macromorphology, microstructures and phase composition were characterized by optical microscope (OM), scanning electron microscopy (SEM) equipped with energy dispersion spectrometry (EDS), and X-ray diffraction (XRD) techniques. The microhardness, wear resistance and corrosion resistance of the gradient coatings were also investigated respectively. The results indicate that the prepared WC/diamond/Co-based gradient composite cladding layer has a fine morphology on the cross sections and a gradient transition of the grain size has been achieved. The microhardness result presents gradient distribution along the depth of the coating. The microhardness is strengthened due to the dispersions of M7C3 (M is Fe, Cr), Co3C, CrCo, Cr3C2, Fe3C in the composite coating, and the highest microhardness of 1342 HV0.2 can be detected in the cladding layer. The friction coefficient values of the coatings range from 0.27 to 0.40, which is much lower than that of the substrate (0.50-0.60). Furthermore, the wear loss of coatings decreases by more than 3 times comparing with that of the substrate (3.5 mg). The polarization resistance results show that the cladding layer has excellent corrosion resistance with polarization resistance can reach the value of 236488.1 Ω·cm2. The gradient transition of the mechanical properties and chemical metallurgical combination between particle (WC, diamond) and adhesive phase can be obtained in laser cladding, which improves the wear resistance and corrosion resistance of the HSS surface.

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