Electroless Ni-P/Diamond/Graphene Composite Coatings and Characterization of their Wear and Corrosion Resistance in Sodium Chloride Solution

2015 ◽  
Vol 656-657 ◽  
pp. 51-56 ◽  
Author(s):  
Cheng Kuo Lee ◽  
Chi Lun Teng ◽  
An Hung Tan ◽  
Ching Yi Yang ◽  
Sheng Long Lee
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloy ◽  
Composite Coating ◽  
Composite Coatings ◽  
Surface Hardness ◽  
Corrosion And Wear ◽  
Nacl Solution ◽  
Graphene Composite ◽  
Plating Solution ◽  
Electroless Ni

The purpose of the present study is to evaluate the effect of the electroless Ni-P/diamond/graphene composite coating on the structure and surface hardness of 2024-T6 aluminum alloy as well as their effect on the corrosion and wear resistance of the alloy in 3.5 % NaCl solution. The electroless Ni-P plating solution was prepared by adding different size diamond (6-12 μm and 0.2 μm) and nanographene into the electroless Ni-P plating solution to obtain Ni-P/diamond, Ni-P/graphene and Ni-P/daimond/graphene composite coatings for comparison. Experimental results indicated that the Ni-P/diamond, Ni-P/graphene and Ni-P/daimond/graphene composite coatings can be successfully electroless deposited on anodized 2024-T6 aluminum alloy. The anodically oxidized films, that formed on the aluminum alloy using phosphoric acid as the electrolyte, was porous with high density of pores, and thus could enhance the adhesion of the composite coatings. The Ni-P/daimond/graphene hybrid coating had a higher hardness as well as better corrosion and wear resistance of 2024-T6 alloy in 3.5 wt.% NaCl solution as compared with other composite coatings. When the combination of nanographene and smaller diamond particles added this beneficial effect was significantly raised, especially the composite coating was further vacuum annealed at 400 °C for 24 h to obtain a more smooth and defect-free coating structure.

Preparation and Tribological Behavior of Ni-P-B4C Electroless Coatings

2014 ◽  
Vol 809-810 ◽  
pp. 615-620
Author(s):  
Ying Wang ◽  
Wan Chang Sun ◽  
Hui Cai ◽  
Qing Hao Yang ◽  
Ju Mei Zhang
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Tribological Behavior ◽  
Composite Coatings ◽  
Micro Hardness ◽  
Wear Weight Loss ◽  
Heat Treated ◽  
Electroless Coatings ◽  
Electroless Ni ◽  
Minimum Wear

In this research, micro-hardness and wear resistance of two types of electroless coatings were investigated including Ni-P and Ni-P-B4C composite coatings. Dispersible B4C particles and electroless Ni-P alloy were codeposited on carbon steel by electroless plating and then heat treated at 200, 400 and 600 °C for 1 h, respectively. The cross-section morphology and microstructure of the composite coatings were characterized. Meanwhile, the micro-hardness and tribological behavior of composite coatings were evaluated. The results showed that the Ni-P-B4C composite coating presents better wear resistance in comparison with that of Ni-P coating. The Ni-P-B4C composite coating with heat treated at 400 °C exhibits high micro-hardness and good wear resistance, which the highest hardness is 1200 HV, the minimum wear weight loss is 0.12 mg and the lowest friction coefficient is 0.2054.

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.

Tribological Properties of Al2O3 Particles Reinforced Ni-P Composite Coating

2017 ◽  
Vol 739 ◽  
pp. 148-151
Author(s):  
Chih I Hsu ◽  
Kung Hsu Hou ◽  
Ming Der Ger
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Composite Coatings ◽  
Deposition Process ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Heat Treated ◽  
Composite Deposits ◽  
Electroless Ni ◽  
Improve Wear Resistance

In this study, hardness and wear resistance of electroless Ni–P and Ni–P/Al2O3 composite coating have been investigated. These composite coatings are applied on iron substrate by electroless deposition process and then they were heat treated at 400°C for 1h. Surface and cross-section morphology of composite deposits have been investigated by scanning electron microscopy (SEM) and microstructural changes were evaluated by X-ray diffraction (XRD) analysis. The results showed that the Al2O3 particles co-deposited in Ni–P matrix led to an increase in the hardness and improve wear resistance, especially when the heat treated at 400°C will have the maximum hardness and wear resistance.

Characteristics of Laser Cladded Nickel-Based Chromic Carbide Composite Coatings

2017 ◽  
Vol 893 ◽  
pp. 340-344
Author(s):  
Sheng Dai ◽  
Dun Wen Zuo ◽  
Xian Rui Zhao ◽  
Jin Fang Wang
Keyword(s):  
Wear Resistance ◽  
Carbon Steel ◽  
Composite Coating ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Surface Hardness ◽  
Micro Hardness ◽  
Wear Properties ◽  
Hardness Tester ◽  
Metallurgical Bonding

To improve the surface hardness and wear resistance of metal parts. Ni-based chromic carbidecomposite coating was prepared on the carbon steel (0.45 mass% C) substrates by laser cladding. Microstructure and wear properties of composite coatings were investigated by SEM, EDS, XRD, Vickers micro-hardness tester and wear machine. The results show that good metallurgical bonding between the Ni-based chromic carbidecomposite coating and carbon steel substrate. Micro-hardness of Ni-based Cr3C2 composite coating along the layer depth presents an evident stepladder distribution. The average micro-hardness of the laser clad coating is about 950 HV. The result of wear experiment shows that Ni-based Cr3C2 composite coating processes good wear resistance.

The Wear Behavior of Electroless Ni-P/SiC Composite Coating

2011 ◽  
Vol 239-242 ◽  
pp. 954-957 ◽  
Author(s):  
Gui Rong Yang ◽  
Wen Ming Song ◽  
Xian Ming Sun ◽  
Ying Ma ◽  
Jin Jun Lu ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Bonding Strength ◽  
Wear Behavior ◽  
Composite Coatings ◽  
Chemical Deposition ◽  
Deposition Technique ◽  
Micro Structure ◽  
Electroless Ni ◽  
Gradient Change

The Ni-P/SiC composite coating was prepared by chemical deposition technique. The micro-structure and wear behavior of electroless Ni-P/SiC composite coating was investigated. The results show that the composite coating was dense and no any defects at the interface between substrate and electroless composite coating. Its thickness could reach 40 μm. Wear resistance was increased with the increasing content of SiC particles for single composite coating when the SiC concentration was less than 6g/L, then decreased with the increased SiC concentration. The wear resistance of gradient composite coating was improved above 16% comparing with the single composite coating. The wear resistance of T1gradient coating was best for all electroless Ni-P/SiC composite coatings because the bonding strength was improved owing to the gradient change of SiC content.

A study on the wear resistance of electroless Ni–P/Diamond composite coatings

Wear ◽  
2000 ◽  
Vol 239 (1) ◽  
pp. 111-116 ◽  
Author(s):  
V.V.N Reddy ◽  
B Ramamoorthy ◽  
P.Kesavan Nair
Keyword(s):  
Wear Resistance ◽  
Composite Coatings ◽  
Diamond Composite ◽  
Electroless Ni

Mechanical properties and wear-corrosion resistance of a new compound extrusion process for magnesium alloy AZ61

2020 ◽  
Vol 62 (4) ◽  
pp. 395-399
Author(s):  
Jiehui Liu ◽  
Hongjun Hu ◽  
Yang Liu ◽  
Dingfei Zhang ◽  
Zhongwen Ou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Magnesium Alloy ◽  
Equal Channel Angular Extrusion ◽  
Extrusion Process ◽  
Corrosion And Wear ◽  
Nacl Solution ◽  
Corrosion Properties ◽  
Manufacturing Method ◽  
Az61 Magnesium Alloy

Abstract Compound extrusion (CE) is a newly developed plastic deformation technique which combines direct extrusion (DE) with a two-pass equal channel angular extrusion (ECAE). This paper focuses on the strength, ductility and anti-corrosion properties of an NaCl solution at certain concentrations and the wear-resistance of dry sliding AZ61 magnesium alloy prepared by CE and DE. It is found that the strength and elongation of the AZ61 alloy prepared by CE are enhanced because of grain refinement. Furthermore, AZ61 magnesium alloy made by CE displays higher corrosion and wear resistance than that prepared by DE. Experimental results prove that CE is a prospective manufacturing method for improving the mechanical properties, anti-corrosion and anti-wear of AZ61 magnesium alloy.

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.

Study on the Wear Resistance of Micro-Nanostructured WC Composite Coating Sintered by Induced Heating

2007 ◽  
Vol 280-283 ◽  
pp. 1489-1492
Author(s):  
Zhen Ting Wang ◽  
Hua Hui Chen
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Solid Solutions ◽  
Composite Coatings ◽  
Micro Hardness ◽  
Q235 Steel ◽  
Metallurgical Bonding ◽  
Sintering Method

Micro-nanostructured WC composite coatings were successfully fabricated by induced heating sintering method on the surface of Q235 steel .The microstructure, micro-hardness and the wear resistance of the composite coatings were studied .The results show that the microstructure of induced heat layer is mainly composed of Ni-based solid solutions and WC particles. And there exists excellent metallurgical bonding between coating and substrate. The wear resistance of micro-nanostructured WC Composite Coatings is increased by 1.5 times on an average as compared with that of micron.

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