Nickel Deposition on Pre-Electroless Plated Ni-P-B Coating on Quartz Optical Fiber in a Lanthanide Oxide-Added Watt Electroplating Bath

Lanthanide oxide was added into the common Watt bath to make a thick nickel on the Ni-P-B coating on the quartz optical fiber surface by response surface method. The experiment showed the optimum concentrations of NiSO4•6H2O, CH3（CH2）11OSO3Na and La2O3 as well as current density were separately 220g/L, 0.08g/L, 0.9g/L and 1.0 A/m2 under which the deposition rate reached 24.2μm/h. The established model had an agreement with the experimental values and can be used to predict the deposition rate within the experimental range. The experiment also showed that the deposition rate, structure and other physical properties of the Ni coating prepared with addition of La2O3(0.9g/L) were greatly improved compared with the sample prepared without addition of La2O3 under same conditions.

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Preparation and Thermodynamics of Nickel-Phosphor Deposition on Surface of Quartz Optical Fiber by Electroless Plating

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.322.432 ◽

2011 ◽

Vol 322 ◽

pp. 432-435

Author(s):

Bo Quan Jiang ◽

Zheng Qiang Xiao

Keyword(s):

Electron Microscope ◽

Optical Fiber ◽

Ph Value ◽

Fiber Surface ◽

Electroless Nickel ◽

Optimal Conditions ◽

Single Factor ◽

Quartz Optical Fiber ◽

Scanning Electron ◽

Strength Of Adhesion

The electroless nickel-phosphor deposition on quartz optical fiber surface was carried out by single factor test. The optimum NiSO4·6H2O, NaH2PO2·H2O , C3H6O2 and H3BO3 concentrations, pH value and temperature were determined to be: 0.1331 mol/L, 0.3019 mol/L, C3H6O20.3761 mol/L, H3BO3 0.4520 mol/L, 4.5 and 84°C, respectively. Scanning electron microscope, stereomicroscope and thermal shock rest were applied to measure the morphology and strength of adhesion of the deposited Ni-P coating. The result showed that a desired Ni-P coating with good smoothness and adhesion was prepared under the optimal conditions. The thermodynamic models were established and proven by the current study.

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Optimization, Characterization and Kinetic Model of Electroless Ni-P Deposition on Quartz Optical Fiber Surface

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.322.428 ◽

2011 ◽

Vol 322 ◽

pp. 428-431 ◽

Cited By ~ 1

Author(s):

Bo Quan Jiang ◽

Zheng Qiang Xiao

Keyword(s):

Kinetic Model ◽

Optical Fiber ◽

Orthogonal Experiment ◽

Nickel Sulfate ◽

Fiber Surface ◽

Sodium Hypophosphite ◽

Thermal Shock Test ◽

Operation Conditions ◽

Quartz Optical Fiber ◽

Energy Spectrometer

Electroless plating was used to deposit Ni-P films on quartz optical fiber surface. The optimal bath compositions and operation conditions were determined by orthogonal experiment: nickel sulfate 0.133 mol/L, sodium hypophosphite 0.30 mol/L, propionic acid 0.268 mol/L, boric acid 0.452 mol/L, pH 5.0 and temperature 84°C. Stereomicroscope, scanning electron microscope, X-ray diffractometer, energy spectrometer and thermal shock test were used to characterize the morphologies, structures, compositions and adhesion of the Ni-P films. The results showed that a Ni-P film with good smoothness and adhesion as well as low resistivity was fabricated. The kinetic model was established and proven by the experiments.

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Experimental and Numerical Analysis of the Nickel Deposition and Diffusion Using Plasma in a Confined Anode-Cathode Configuration

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.283-286.183 ◽

2009 ◽

Vol 283-286 ◽

pp. 183-189 ◽

Cited By ~ 1

Author(s):

Rodrigo Perito Cardoso ◽

A.M. Maliska ◽

C.R. Maliska

Keyword(s):

Deposition Process ◽

Interstitial Free ◽

Cathode Voltage ◽

Nickel Deposition ◽

Plasma Sintering ◽

Pulsed Dc ◽

Proposed Model ◽

Constant Rate ◽

Experimental Values ◽

Volume Method

This work presents a theoretical and experimental study of nickel deposition on iron samples at relatively high pressure using a pulsed DC glow discharge. The deposition process was conducted in conditions similar to that used for plasma sintering, using the confined anode-cathode configuration. The cathode was made from nickel commercially pure and the samples were made from interstitial free steel and sintered pure iron. The samples were characterized by mass weight gain, scanning electron microscopy and energy-dispersive X-ray microanalysis. The deposition process was mathematically modeled and the model was numerically solved using a conservative finite-volume method. The experiments demonstrated that the deposition occurs at a constant rate, with the mass flux changing linearly with the cathode voltage in the range of parameters considered. The results obtained from the diffusion model applied to the sample presented good agreement with the experimental values. Concerning the gas phase, the proposed model helped us to clarify some phenomenological aspects of the process. However, further studies, principally in the area of electrical discharges, are needed to permit a complete comprehension of this process.

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Fabrication and Research of Electroless Nickel Plating on Carbon Fiber with Palladium-Free Activation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.148-149.410 ◽

2010 ◽

Vol 148-149 ◽

pp. 410-415

Author(s):

Xiao Ping Luo ◽

Ming Gang Zhang ◽

Chun Xiang Lv

Keyword(s):

Tensile Strength ◽

Carbon Fiber ◽

Fiber Surface ◽

Electroless Nickel ◽

Electroless Nickel Plating ◽

Nickel Plating ◽

Adhesive Properties ◽

Nickel Deposition ◽

X Ray ◽

Electroless Ni

A new procedure of surface activation without using palladium salt is proposed for electroless nickel plating (Ni-P) on carbon fiber. The optimal formula and technical conditions for palladium-free activated electroless Ni-P were obtained by orthogonal experiments. The effects of nitric acid processing time on the quality of nickel coating was investigated .The effects of varying concentrations of Ni2 + on the rate of weight gain during the Ni2 + complex adsorption process were also analyzed and the kinetic equation of the process was established. The theoretical values calculated by the equation were proven to be consistent with the experimental verification. The material characteristics of the deposited layers were analyzed by scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDX) and X-ray diffraction (XRD). The tensile strength of the carbon fibers was analyzed by the Weibull method, and this showed that when the thickness of the Ni-P coating reached 0.150μm, the tensile strength reached a maximum value. The experimental results showed that the nickel deposition on the carbon fiber surface obtained by this method, had the same uniformity, compactness and adhesive properties as the one by conventional electroless Ni-P.

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Corrosion Behavior of AA 1100 Anodized in Gallic-Sulfuric Acid Solution

Coatings ◽

10.3390/coatings11040405 ◽

2021 ◽

Vol 11 (4) ◽

pp. 405

Author(s):

Marlon L. Mopon ◽

Jayson S. Garcia ◽

Dexter M. Manguerra ◽

Cyril John C. Narisma

Keyword(s):

Corrosion Resistance ◽

Sulfuric Acid ◽

Acid Solution ◽

Gallic Acid ◽

Acid Concentration ◽

Sulfuric Acid Solution ◽

Current Density ◽

Electrochemical Impedance ◽

Anodized Aluminum ◽

The Common

Sulfuric acid anodization is one of the common methods used to improve corrosion resistance of aluminum alloys. Organic acids can be added to the sulfuric acid electrolyte in order to improve the properties of the anodized aluminum produced. In this study, the use of gallic acid as an additive to the sulfuric acid anodization of AA1100 was explored. The effect of varying anodization current density and gallic acid concentration on the properties of anodized aluminum samples was observed using electrochemical impedance spectroscopy, linear polarization, and scanning electron microscopy. It was observed that the corrosion resistance of samples anodized in gallic-sulfuric acid solution at 10 mA·cm−2 is lower than samples anodized in sulfuric acid. It was also observed that higher anodization current density can lead to lower corrosion resistances for aluminum samples anodized in gallic-sulfuric acid solution. However, samples anodized at 5 mA·cm−2 and at a gallic acid concentration of 5 g·L−1 showed better corrosion performance than the samples anodized in sulfuric acid only. This suggests that the use of low amounts of gallic acid as an additive for sulfuric acid anodization can lead to better corrosion resistances for anodized aluminum.

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Parameter Optimization of High Deposition Rate Laser Cladding Based on the Response Surface Method and Genetic Neural Network Model

Chinese Journal of Lasers ◽

10.3788/cjl202148.0602112 ◽

2021 ◽

Vol 48 (6) ◽

pp. 0602112

Author(s):

庞祎帆 Pang Yifan ◽

傅戈雁 Fu Geyan ◽

王明雨 Wang Mingyu ◽

龚燕琪 Gong Yanqi ◽

余司琪 Yu Siqi ◽

...

Keyword(s):

Neural Network ◽

Response Surface ◽

Response Surface Method ◽

Deposition Rate ◽

Network Model ◽

Parameter Optimization ◽

Neural Network Model ◽

High Deposition Rate ◽

Surface Method ◽

Genetic Neural Network

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Heat Transfer in Chemical Vapor Deposited Optical Fiber Coatings

10.1115/imece2001/htd-24371 ◽

2001 ◽

Author(s):

Patricia O. Iwanik ◽

Wilson K. S. Chiu

Keyword(s):

Heat Transfer ◽

Optical Fiber ◽

Gas Flow ◽

Convection Heat Transfer ◽

Fiber Surface ◽

Chemical Vapor ◽

Temperature Changes ◽

Flow And Heat Transfer ◽

Chemical Vapor Deposited ◽

Fiber Coatings

Abstract A fundamental understanding of how reactor parameters influence the fiber surface temperature is essential to manufacturing high quality optical fiber coatings by chemical vapor deposition (CVD). In an attempt to better understand this process, a finite volume model has been developed to study the gas flow and heat transfer of an optical fiber as it travels through a CVD reactor. This study showed that draw speed significantly affects fiber temperature inside the reactor, with temperature changes up to 45% observed under the conditions studied. Multiple heat transfer modes contribute to this phenomena, with convection heat transfer dominating the process.

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