Preparation and Properties of Electroless Ni-P-β-SiC Composition Coating

2014 ◽  
Vol 809-810 ◽  
pp. 621-626
Author(s):  
Xiao Meng Zhang ◽  
Li Bin Niu ◽  
Xiao Cui Wei ◽  
Xiao Gang Wang ◽  
Xiao Hu Hua
Keyword(s):  
Composite Coating ◽  
Deposition Rate ◽  
Optimum Process ◽  
Process Conditions ◽  
X Ray Diffraction ◽  
Coating Deposition ◽  
Chemical Plating ◽  
Plating Method ◽  
Electroless Ni ◽  
Sic Particle

Through orthogonal test of Ni-P chemical plating process optimization to determine the optimum process recipe, the Ni-P-β-SiC composite coating were prepared by chemical plating method. The deposition rate, microhardness, composition and organization of Ni-P-β-SiC composite coating are observed and analyzed by scanning electron microscopy (SEM), vivtorinox microhardness tester, X ray diffraction (XRD) and energy spectrum analysis (EDS). The influences of β-SiC particle concentration in bath on the solution of composite coating deposition rate and microhardness. The results show that the influence of composite coating deposition rate and microhardness are NiSO4•6H2O, NaH2PO2•H2O, C3H6O3, and PH. The optimum process conditions: NiSO4•6H2O 25 g/L, NaH2PO2•H2O 27 g/L, C3H6O327 ml/L, PH 5.2. It was found that the Ni-P-β-SiC composite coating with 5g/Lβ-SiC particles exhibited a maximum deposition rate and microhardness, the deposition rate of composite coating is 12.32μm/h, microhardness is 567.93HV0.05.

Application of Box–Behnken design for modeling of lead adsorption onto unmodified and NaCl-modified zeolite NaA obtained from biosilica

2016 ◽  
Vol 75 (2) ◽  
pp. 358-365 ◽  
Author(s):  
Pinar Terzioğlu ◽  
Sevil Yücel ◽  
Mehmet Öztürk
Keyword(s):  
Optimum Process ◽  
Process Conditions ◽  
X Ray Diffraction ◽  
Hydrothermal Conditions ◽  
Lead Adsorption ◽  
Box Behnken Design ◽  
Lack Of Fit ◽  
Adsorption Capacities ◽  
Zeolite Naa ◽  
Wheat Husk

The main objective of the present study was to optimize lead adsorption onto zeolite NaA. For this purpose, to synthesize zeolite NaA under hydrothermal conditions, local wheat husk was precleaned with chemical treatment using hydrochloric acid solution. The unmodified (ZU) and NaCl-modified (ZN) zeolites were characterized by Brunauer–Emmett–Teller, scanning electron microscopy coupled with energy dispersive spectroscopy and X-ray diffraction. The optimization of adsorption process was examined using Box–Behnken Experimental Design in response surface methodology by Design Expert Version 7.0.0 (Stat-Ease, USA). The effects of initial lead (II) concentration, temperature, and time were selected as independent variables. Lack of fit test indicates that the quadratic regression model was significant with the high coefficients of determination values for both adsorbents. Optimum process conditions for lead (II) adsorption onto ZU and ZN were found to be 64.40°C and 64.80°C, respectively, and 90.80 min, and 350 mg L−1 initial lead(II) concentration for both adsorbents. Under these conditions, maximum adsorption capacities of ZU and ZN for lead (II) were 293.38 mg g−1 and 321.85 mg g−1, respectively.

Synthesis and Properties of Electroless Ni-P-W/Nano-Al2O3 Composite Coatings Deposited on Sintered NdFeB Permanent Magnet

2011 ◽  
Vol 306-307 ◽  
pp. 901-906 ◽  
Author(s):  
Huan Ming Chen ◽  
Ya Hong Gao ◽  
Qiong Lv ◽  
Dong Yang ◽  
Xin Xin Lin
Keyword(s):  
Corrosion Resistance ◽  
Permanent Magnet ◽  
Composite Coatings ◽  
Alloy Coating ◽  
X Ray Diffraction ◽  
Ndfeb Magnet ◽  
X Ray ◽  
Plating Method ◽  
Ndfeb Permanent Magnet ◽  
Electroless Ni

The Ni-P-W/nano-Al2O3composite coatings were deposited on the surface of sintered NdFeB permanent magnet by electroless plating method. The morphology and the phases of Ni-P-W/nano-Al2O3composite coatings were investigated using scanning electron microscopy and X-ray diffraction respectively. The hardness and the corrosion resistance of the composite coatings were also tested. The results indicated that the composite coatings morphology appears closely nodules morphology, and the microhardness increases with increasing incorporation of Al2O3ratio. Compared with NdFeB magnet and Ni-P-W alloy coatings, the corrosion resistance of the composite coatings was superior to that of the NdFeB magnet and the alloy coating obviously.

Characteristics of Electroless Nickel-Phosphorus-Potassium Titanate Whisker Composite Coating

2012 ◽  
Vol 472-475 ◽  
pp. 70-73
Author(s):  
Ya Xu Jin ◽  
Yu Ming Tian ◽  
Qiu Shu Li
Keyword(s):  
Heat Treatment ◽  
Composite Coating ◽  
Composite Coatings ◽  
Electroless Nickel ◽  
Medium Carbon Steel ◽  
Treatment Temperature ◽  
X Ray Diffraction ◽  
Potassium Titanate ◽  
Steel Substrates ◽  
Electroless Ni

Electroless nickel plating with potassium titanate whisker was co-deposited on medium carbon steel substrates. The microstructure of the composite coatings was investigated. The effect of aging temperature on the microstructure of the composite coatings was studied using X-ray diffraction. The results indicate that the composite coatings will turn into crystal state with increasing heat treatment temperature. Experimental results also show that a maximum hardness is achieved for the composite coating after heat treatment at 400°C for 1 hour. The corrosion resistance and tribological properties of the composite coatings are not inferior to those of electroless Ni-P coating.

Characterization of Fe2O3-CaO-SiO2 Glass Ceramics Prepared by Sol-Gel

2014 ◽  
Vol 624 ◽  
pp. 114-118 ◽  
Author(s):  
Yao Yao Wang ◽  
Bin Li ◽  
Yong Ya Wang
Keyword(s):  
Sol Gel ◽  
Glass Ceramics ◽  
Optimum Process ◽  
Process Conditions ◽  
X Ray Diffraction ◽  
Crystallization Activation Energy ◽  
Treatment Technology ◽  
X Ray ◽  
Heat Treatment Technology

Ferromagnetic glass ceramics with magnetism and biological activity could be used for magnetic induction hyperthermia. In this study Fe2O3-CaO-SiO2glass-ceramics were prepared by sol-gel method. The sample was characterized by X-ray diffraction (XRD) and differential thermal analysis (DTA). The results showed that the major phases of the sample are wollastonite and magnetite and the crystallization activation energy of sample is 189.3KJ/mol, which would provide a theoretical basis for the establishment of the optimum process conditions of heat treatment technology.

scholarly journals Microstructure Study and Morphology of Ni / Nano Al2O3 Composite Coating Synthesied by Electroless Plating

2021 ◽  
Vol 14 (3) ◽  
pp. 1-7
Author(s):  
Hala M. Kadhim
Keyword(s):  
Composite Coating ◽  
Phase Structure ◽  
Composite Coatings ◽  
Chemical Properties ◽  
Diffraction Method ◽  
Nanocomposite Coating ◽  
Process Conditions ◽  
Al2o3 Nanoparticles ◽  
X Ray Diffraction ◽  
Al2o3 Composite

The electroless deposition method was used to prepare Ni-based nanocomposite coatings, this approach represents an alternate way of having coatings on the different substrates. Most of the previous literatures on this subject and work deals with a study the effect of the process conditions and, Bath composition on the microstructure at the macroscale of Ni-Al2O3 composite coatings. Though, effect on the step structure of the composition of the bath and microstructure are little, the present work aims to study the effect of hard ceramic Al2O3 nanoparticles at different concentrations (0.0, 0.5, 1.0, 2, 4) g/L, on the phase structure, microstructure and morphology of Al2O3 nanocomposite coating, in order to enhance the mechanical, plysical and chemical properties of nanocomposite coating. In this paper, An X-Ray diffraction method, spectroscopy (EDS), energy dispersive, and scanning electron microscope (SEM) were studied in the phase structure, chemical composition and morphological nanocomposition coatings. In the present paper, is evident from EDS study that the composite coating consists of Ni and nanoparticles of Al2O3. The micrograph study of the EDS showed that A flat and smooth surface is present in the deposited nanocomposite coating. Uniform distribution of nanoparticles of alumina within Ni-Matrix. And the XRD study showed the crystalline structure of the Ni- Al2O3 nanocomposite coating.

Research on Prepared Technology and Tribological Behaviors of Ni-P-PTFE Composite Coating

2011 ◽  
Vol 233-235 ◽  
pp. 1059-1062
Author(s):  
Chuan Qi Fu ◽  
Zhou Wang ◽  
Xu He
Keyword(s):  
Composite Coating ◽  
Wear Mechanism ◽  
Friction And Wear ◽  
Process Condition ◽  
Optimum Process ◽  
X Ray Diffraction ◽  
Coating Technology ◽  
Ptfe Composite ◽  
Binding Force ◽  
Tribological Behaviors

Ni-P-PTFE composite coating was prepared by electroless plating based on the Ni-P coating technology. The effects of surfactant and PTFE content on the binding force, hardness, friction coefficient, wear rate and content of PTFE particles of the composite coating was investigated. In addition, the tribological behaviors of composite coating were discussed. The surface morphology and microstructures of composite coating were analyzed using scanning electron microscopy (SEM) and X-ray diffraction (XRD), and the wear mechanism of composite coating was analyzed by using the MRH-3 friction and wear tester. The results indicated that the Ni-P-PTFE composite coating prepared under the optimum process condition exhibited excellent friction properties, and the wear mechanism is manifested as adhesion and slight grain-abrasion during the abrasion.

The Effect of SiC Particle Size on the Microstructure and Hardness of SiCp/Cu Composites

2014 ◽  
Vol 997 ◽  
pp. 442-445
Author(s):  
Ming Hu ◽  
Li Li Tang ◽  
Lin Shan ◽  
Yun Long Zhang
Keyword(s):  
Particle Size ◽  
Vickers Hardness ◽  
Copper Matrix ◽  
X Ray Diffraction ◽  
Chemical Plating ◽  
Hardness Tester ◽  
Sic Particles ◽  
Structure Morphology ◽  
Hot Press Sintering ◽  
Sic Particle

The chemical plating technology was applied in order to improve the weaker wettability between the copper and SiC particles for electronic packaging applications. The hot-press sintering technique was executed to fabricate SiCp/Cu composites. The influence of SiC particles size on the phase constitute, micro-structure morphology and vickers hardness were investigated in details by means of X-ray diffraction, scanning electron microscope and vickers hardness tester. The results showed that SiC particle were distributed in copper matrix uniformly and interface was clear. The relative density and vickers hardness of SiCp/Cu composites increased as SiC particle size enhanced.

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.

Electroless Ni-P-Zn Alloy Deposition on Surface of Low Carbon Steel

2011 ◽  
Vol 366 ◽  
pp. 482-485 ◽  
Author(s):  
Yu De Liu ◽  
Bo Quan Jiang ◽  
Zheng Qiang Xiao
Keyword(s):  
Carbon Steel ◽  
Deposition Rate ◽  
Low Carbon Steel ◽  
Process Conditions ◽  
Low Carbon ◽  
Xrd Pattern ◽  
Sem Image ◽  
Carbon Steel Surface ◽  
Resistance Performance ◽  
Electroless Ni

Electroless plating technique was used to deposit Ni-Zn-P alloy on low carbon steel surface. The optimal process conditions for the Ni-Zn-P deposition rate were determined and under which the bath remained stable and the maximum deposition rate reached 14.5×10-5mol/(cm2•h). The optimal technical conditions for the Ni-Zn-P alloy corrosion resistance performance were also determined and under which the ternary alloy obtained the longest corrosion time. The SEM image and XRD pattern showed that the deposited Ni-Zn-P coating exhibited good smoothness, high density, free of defects and was proven to be a mixture of inhomogeneous phase and nickel solid solution at plating state.

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