Microstructure and Properties of Brush Electroplated Nano-SiC-Al2O3/Ni Composite Coating

2008 ◽  
Vol 373-374 ◽  
pp. 285-288 ◽  
Author(s):  
Hua Yang ◽  
Shi Yun Dong ◽  
Bin Shi Xu
Keyword(s):  
Zeta Potential ◽  
Composite Coating ◽  
Nickel Coating ◽  
Steel Substrate ◽  
Pure Nickel ◽  
Nano Particles ◽  
Strengthening Effect ◽  
Microstructure And Properties ◽  
1045 Steel ◽  
Sic Particle

This paper investigated the effect of nano-SiC particle on microstructure and properties of brush electroplated nano-Al2O3/Ni composite coating. Three kinds of coatings, such as pure nickel coating, nano-Al2O3/Ni composite coating and nano-SiC-Al2O3/Ni composite coating, were fabricated on 1045 steel substrate. Before deposited, Zeta potential of nano-particles in the solution was examined. The results show Zeta potential of the nanoparticles in the nano-Al2O3/Ni electrolyte is negative, but that of the nanoparticles in nano-SiC-Al2O3/Ni electrolyte is positive when the pH value of electrolyte is about 7.5. Energy dispersive spectroscopy (EDS) results show Al element content in the nano-Al2O3/Ni coating is 5.65%, while the content of Al and Si elements in nano-SiC-Al2O3/Ni coating is 5.63% and 4.86% respectively. It confirms that nano-SiC particle co-deposited in the composite coating while nano-Al2O3 particle content keeps constant. The microhardness of nano-SiC-Al2O3/Ni coating exhibits the highest, while the pure nickel coating is the lowest. And surface morphology of nano-SiC-Al2O3/Ni coating is the most smooth and compact among the three coatings. The wear test results reveal that wear resistance of nano-SiC-Al2O3/Ni coating is 1.7 times of that of nano-Al2O3/Ni coating, and 2.3 times of that of pure nickel coating. The above results show the nano-SiC particle services a strengthening effect on the combination performance of nano-SiC-Al2O3/Ni coating.

Microstructure and Properties of TiC/Ni Composite Coating Prepared with Laser Clad on Q235 Steel Substrate

Applied laser ◽  
2014 ◽  
Vol 34 (3) ◽  
pp. 199-203
Author(s):  
李养良 Li Yangliang ◽  
潘东 Pan Dong ◽  
宋杰光 Song Jieguang ◽  
仪登亮 Yi Dengliang
Keyword(s):  
Composite Coating ◽  
Steel Substrate ◽  
Q235 Steel ◽  
Microstructure And Properties

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.

Microstructure and Properties of TiC/Ni Composite Coating Prepared with Laser Clad on Q235 Steel Substrate

Applied laser ◽  
2014 ◽  
Vol 34 (3) ◽  
pp. 199-203
Author(s):  
李养良 Li Yangliang ◽  
潘东 Pan Dong ◽  
宋杰光 Song Jieguang ◽  
仪登亮 Yi Dengliang
Keyword(s):  
Composite Coating ◽  
Steel Substrate ◽  
Q235 Steel ◽  
Microstructure And Properties

scholarly journals Electroless Deposition of Ni-P/SiO2 Composite Coating

2016 ◽  
Vol 64 (5) ◽  
pp. 1459-1464 ◽  
Author(s):  
Martin Buchtík ◽  
Petr Kosár ◽  
Jaromír Wasserbauer ◽  
Martin Zmrzlý
Keyword(s):  
Electron Microscope ◽  
Composite Coating ◽  
Electroless Deposition ◽  
Nickel Coating ◽  
Steel Substrate ◽  
Deposition Process ◽  
Second Step ◽  
Nucleation Center ◽  
Eds Analysis ◽  
Scanning Electron

Electroless deposit Ni–P/SiO2 composite coating was performed on the steel substrate, DIN EN 10130. The preparation of nickel coating included two main steps. In the first step, the fraction of SiO2 particles sized the tens of nanometres was obtained by sedimentation. In the second step, the composite coating was plated on the steel substrate. The actual deposition process contains the deposition of plain Ni-P interlayer which served as the nucleation center for the deposition of Ni-P/SiO2 composite coating with co-deposited SiO2 particles. The morphology of deposited composite coating was studied by scanning electron microscope (SEM). Amount of individual elements in deposited coatings was determinated by EDS analysis. The microhardness of deposited composite coating was subsequently compared with microhardness value of the plain Ni–P coating.

scholarly journals Microstructure and Mechanical Properties Investigation of Ni35A-TiC Composite Coating Deposited on AISI 1045 Steel by Laser Cladding

2021 ◽  
Author(s):  
Hao Zhang ◽  
Guofu Lian ◽  
Qiang Cao ◽  
Yingjun Pan ◽  
Yang Zhang
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Laser Cladding ◽  
Coefficient Of Friction ◽  
Laser Energy ◽  
Steel Substrate ◽  
Micro Hardness ◽  
Aisi 1045 Steel ◽  
Aisi 1045 ◽  
1045 Steel

Abstract In this research, the TiC-Ni35A composite coating was fabricated on the AISI 1045 steel substrate by laser cladding process. The cross-sectional morphology, microstructure, micro-hardness, and wear resistance of coatings obtained under different laser energy densities (E) and TiC powder ratios (PR) were analyzed. According to the results, all the coating had a reliable metallurgical bonding with the AISI 1045 steel substrate. The X-ray diffraction (XRD) analysis revealed that the coating phases were Ni and TiC. The average microhardness of the Ni35A-80wt.% TiC coating reached up to 75.12 HRC. The minimum coefficient of friction of the composite coating was only about 30% of the AISI 1045 substrate. The wear form was mainly adhesive wear when altering the TiC powder ratios, while the wear form also contained abrasion wear under different energy densities. The ability of decomposition and re-nucleation of TiC was significantly improved with the increase of laser energy densities and the decrease of TiC powder ratios. The micro-hardness, wear resistance, and coefficient of friction of the composite coating were improved because of the TiC strengthening phase particles. Compared with the AISI 1045 steel substrate, the micro-hardness and wear resistance of the composite coating was increased by 5.29 times and 6.26 times, respectively.

scholarly journals Microstructure and Wear Behavior of Laser Cladded Ni45 + High-Carbon Ferrochrome Composite Coatings

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1611
Author(s):  
Jiayang Gu ◽  
Ruifeng Li ◽  
Shungao Chen ◽  
Yuhao Zhang ◽  
Shujin Chen ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Laser Cladding ◽  
Wear Behavior ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Solid Solution Phase ◽  
High Carbon ◽  
Carbon Ferrochrome ◽  
1045 Steel

A composite coating with enhanced mechanical properties including high hardness and excellent wear resistance was produced by laser cladding of mixed Ni45 and high-carbon ferrochrome powders on an ASTM 1045 steel substrate. Different quantities, ranging from 10 to 50 wt.% of high-carbon ferrochrome powder were added to the Ni45 powder to investigate the effect of mixture content on the cladding performance. The microstructure of the coatings were examined using scanning electron microscope, and the wear resistance was compared using a wear tester apparatus among the different cases. The results showed that the microstructure of the coating with 30 wt.% high-carbon ferrochrome content was mainly fine solid solution phase. With the increase of high-carbon ferrochrome content to 40 wt.% and above, cracks appeared on the cladding surface due to a large amount of chromium carbides formed during the process. The microhardness was enhanced remarkably by laser cladding the composite coating on the 1045 substrate, with 2.4 times higher than the hardness of the substrate when 30 wt.% high-carbon ferrochrome content was added. The best wear performance was achieved when the high-carbon ferrochrome content was 30 wt.%, demonstrating the smallest surface roughness and depth of wear marks. With further increased high-carbon ferrochrome content, microcracking and delamination were observed on the worn surfaces.

Fabrication of Ni-Based Composite Coating Reinforced with NbC Particles by Laser Cladding

2011 ◽  
Vol 686 ◽  
pp. 553-560
Author(s):  
Gang Dong ◽  
Biao Yan ◽  
Qi Lin Deng ◽  
Ting Yu ◽  
Yu Xin Wang ◽  
...  
Keyword(s):  
Composite Coating ◽  
Laser Cladding ◽  
Steel Substrate ◽  
Wear Test ◽  
Alloy Coating ◽  
Dry Sliding Wear ◽  
Wear Volume ◽  
Wear Property ◽  
1045 Steel

The in situ synthesized NbC particles reinforced Ni-based alloy composite coating has been successfully prepared on 1045 steel substrate by laser cladding a precursor mixture of Ni-based alloy, graphite and niobium powders. The microstructure, phase composition and wear property of the composite coating are investigated by means of scanning electron microscopy (SEM), X-ray diffraction (XRD) and dry sliding wear test. The experiment results show that the coating is uniform, continuous and free of pores and cracks with excellent bonding between the coating and the substrate. The microstructure of the coating is mainly composed of γ-Ni dendrite, a large amount of interdendritic eutectics of M23(CB)6, N3B with γ-Ni, M23(CB)6type carbides and dispersed NbC particles. The growth mechanism of the NbC particles with cores is nucleation-growth and the un-melted niobium may act as the nucleation core for NbC, Compared to the pure Ni-based alloy coating, the hardness of the composite coating is increased about 36 %, giving a high average hardness of approximate HV0.2750. Moreover, the wear volume and wear rate of the composite coating are decreased about 50 % and 42 %, respectively. This is attributed to the presence of in situ synthesized NbC particles and their well distribution in the coating.

scholarly journals Study on the Effect of Ni Addition on the Microstructure and Properties of NiTi Alloy Coating on AISI 316 L Prepared by Laser Cladding

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4373
Author(s):  
Yuqiang Feng ◽  
Zexu Du ◽  
Zhengfei Hu
Keyword(s):  
Laser Cladding ◽  
Niti Alloy ◽  
Second Phase ◽  
Content Increase ◽  
Strengthening Effect ◽  
Mixed Powder ◽  
Microstructure And Properties ◽  
Cladding Layer ◽  
Ni Addition ◽  
Aisi 316 L

This paper investigated 55 NiTi commercial alloy powder and 55 NiTi with 5% pure Ni mixed powder (55 NiTi + 5 Ni) coatings fabricated by laser cladding to study the effect of extra Ni addition on the microstructure and properties of the coating. The XRD and EDS results show that the major phases in the coatings were NiTi and Ni3Ti. Besides that, a second phase like Ni4Ti3, Fe2Ti, and NiTi2 was also detected, among which, NiTi2 was only found in 55 NiTi coating. The proportion of the phase composition in the coating was calculated via the software Image-Pro Plus. The hardness of the cladding layer reaches 770–830 HV, which was almost four times harder than the substrate, and the hardness of 55 NiTi + 5 Ni coating was around 8% higher than that of 55 NiTi coating. The wear resistance of the 55 NiTi + 5 Ni coating was also better; the wear mass loss decreased by about 13% and with a smaller friction coefficient compared with the 55 NiTi coating. These results are attributed to the solid solution strengthening effect caused by Ni addition and the second phase strengthening effect caused by the content increase of the Ni3Ti phase in the cladding layer.

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