A novel electroless plating of Ni–P–TiO2 nano-composite coatings

Chen, Weiwei; Gao, Wei; He, Yedong

doi:10.1016/j.surfcoat.2010.01.032

Cited by 178 publications

(62 citation statements)

References 19 publications

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“…[16][17][18][19][20][21][22][23][24] 8.68 ml of tetrabutylorthotitanate [Ti (OBu) 4 ] was dissolved into the mixture solution of 35 mL ethanol and 2.82 mL diethanolamine (DEA). After magnetic stirring for 2 h, it was hydrolyzed by adding a mixture of 0.45 mL deionized water and 4.5 mL ethanol dropwise under magnetic stirring.…”

Section: Methodsmentioning

confidence: 99%

Au-Ni-TiO₂Nano-Composite Coatings Prepared by Sol-Enhanced Method

Wang

Wei

et al. 2014

J. Electrochem. Soc.

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Gold coatings are widely used in many fields for their shining color, excellent corrosion resistance, and electrical conductivity. However, they are not mechanically strong with low wear resistance. In this paper, we have prepared nano-composite Au-Ni-TiO 2 coatings by our newly developed sol-enhanced electroplating method. In order to obtain the optimal mechanical properties, a systematic study of Au-Ni-x TiO 2 coatings with different sol concentrations (x is the sol doping concentration from 0 to 25 mmol/L) has been conducted. It was found that nano-particles (3-12 nm) of TiO 2 were highly dispersed in the coating matrix. The mechanical properties of sol-enhanced nano-composite coating were significantly increased. The nano-hardness of the coatings was improved from 2.55 ± 0.13 GPa to 3.20 ± 0.15 GPa. Consequently, the scratch resistance and wear resistance of the sol-enhanced coating were also improved significantly. Meanwhile, the electrical resistivity of the sol-enhanced coatings keeps a same level as the pure Au-Ni coatings. Gold (Au) and gold alloy have been widely used in various applications for their unique properties such as beautiful/shining color, high chemical stability, good ductility, excellent conductivity, and good weldability.1-5 Au, Au alloy and Au based composite coatings have been synthesized by various technologies, such as E-Beam Evaporation, Magnetron Sputtering, Sol-gel deposition, Chemical Vapour Deposition (CVD), Electrochemical Over-potential Deposition (OPD), and Electroplating.6-9 Among these fabrication methods, electroplating method is a simple way to fabricate gold coatings because of its energy effectiveness, time efficiency, without using vacuum technology and the controllability of coating thickness and grain size. 10In order to improve the hardness of pure Au, alloy elements such as Co and Ni were co-deposited with Au, which is known as hard Au. Hard Au can be used on decoration surface and electrical components where shining color, chemical inertness and good wear resistance are combined. As expected, however, the electrical conductivity decreased with increasing mechanical strength. 11,12For the requirements mentioned above, the mechanical properties such as wear resistance and hardness of coatings are the most important factors which dominate the durability and service life of coated parts. In the past decades, many attempts were devoted to improve the mechanical properties of Au coatings. One of the popular methods is using hard particles to form composite coatings. [13][14][15] It is widely accepted that the highly dispersive nano-particles in composites can realize good strengthening effect. In order to achieve good dispersion of nano-particles, the electrolyte has be to maintained by special techniques, such as vigorous agitation, air injection, and/or adding surfactants. However, it is difficult to achieve good suspension because of the small particle size and large surface energy, which caused agglomeration of the nano-particles. The surface appearance of Au based ...

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Section: Methodsmentioning

confidence: 99%

Au-Ni-TiO₂Nano-Composite Coatings Prepared by Sol-Enhanced Method

Wang

Wei

et al. 2014

J. Electrochem. Soc.

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“…Chen et al added a transparent layer of TiO 2 to conventional ENP to improve its hardness. The hardness was in turn increased from 710 to 1025 HV 0.2 and the wear resistance level was improved [68]. Liuhui et al reported that TiN nanoparticles can considerably improve the hardness of a Ni-P-TiN nanocomposite coating due to its uniform distribution in the Ni-P matrix [69].…”

Section: Hardnessmentioning

confidence: 99%

Recent advances in electroless-plated Ni-P and its composites for erosion and corrosion applications: a review

et al. 2018

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The metallic coating of surfaces plays a vital role in the protection of most industrial applications. Coatings can be carried through various routes (e.g., mechanical and electrochemical plating techniques). Electroless nickel coatings present unparalleled properties and a unique combination of corrosion and wear resistance features. Recently, the use and development of electroless nickel-phosphorus (ENP) coatings has attracted broad attention from many industries (e.g., oil and gas) due to their superior corrosion and wear resistance properties. In the present review article, mechanisms of ENP and preparation methods are briefly outlined. The review sheds light on properties of electroless Ni-P coatings and of their nanocomposites with an emphasis on new products and on their future development.

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“…Uniform distribution of composite particles in Ni-P matrix layer plays an important role in improvement of microhardness and wear resistance of the composite coatings. It is possible to improve tribological and mechanical properties using a special technique, solgel technique, in which second phase particles are not agglomerated in the electroless bath [6].…”

Section: Introductionmentioning

confidence: 99%

“…After heat treatment (400 ∘ C), Al 2 O 3 composite coatings exhibited excellent wear resistance compared to Ni-P coatings due to formation of hard Ni 3 P alloy phase [9]. The Ni-P-TiO 2 composite coatings have excellent wear resistance (lower width of wear track) compared to conventional Ni-P coating [6]. The Ni-P-nano-Al 2 O 3 composite coating has higher hardness and excellent wear resistance to adhesive wear compared to Ni-P and Ni-P-Al 2 O 3 (micro) composite coatings [10].…”

Section: Introductionmentioning

confidence: 99%

Improvement in Tribological Performance of Ni-P-TiO₂ Composite Coatings Using Taguchi Technique with Grey Relational Analysis

Gadhari

Sahoo

2015

Indian Journal of Materials Science

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Tribological performance of Ni-P-TiO 2 composite coatings is improved by varying the tribological test parameters such as normal load, wear track diameter, and duration of test aiming at minimum wear and friction of the coating. Taguchi technique with grey relational analysis is employed for optimization of multiresponse problem using 27 orthogonal array (OA). Analysis of variance (ANOVA) is used to find out the significant effect of test parameters and their interactions on friction and wear behavior of the coating. ANOVA results reveal that normal load and time (test duration) have the most significant effect in controlling wear and friction of the coating. Interaction between normal load and wear track diameter has some significant effect. Scanning electron microscopy of worn surface shows abrasive wear to be predominant. The surface morphology, composition, and phase structure analysis are done with the help of scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, and X-ray diffraction (XRD) analysis, respectively.

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A novel electroless plating of Ni–P–TiO2 nano-composite coatings

Cited by 178 publications

References 19 publications

Au-Ni-TiO₂Nano-Composite Coatings Prepared by Sol-Enhanced Method

Au-Ni-TiO₂Nano-Composite Coatings Prepared by Sol-Enhanced Method

Recent advances in electroless-plated Ni-P and its composites for erosion and corrosion applications: a review

Improvement in Tribological Performance of Ni-P-TiO₂ Composite Coatings Using Taguchi Technique with Grey Relational Analysis

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A novel electroless plating of Ni–P–TiO2 nano-composite coatings

Cited by 178 publications

References 19 publications

Au-Ni-TiO2Nano-Composite Coatings Prepared by Sol-Enhanced Method

Au-Ni-TiO2Nano-Composite Coatings Prepared by Sol-Enhanced Method

Recent advances in electroless-plated Ni-P and its composites for erosion and corrosion applications: a review

Improvement in Tribological Performance of Ni-P-TiO2 Composite Coatings Using Taguchi Technique with Grey Relational Analysis

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Product

Resources

About

Au-Ni-TiO₂Nano-Composite Coatings Prepared by Sol-Enhanced Method

Au-Ni-TiO₂Nano-Composite Coatings Prepared by Sol-Enhanced Method

Improvement in Tribological Performance of Ni-P-TiO₂ Composite Coatings Using Taguchi Technique with Grey Relational Analysis