The effect of carbon nanotubes on the corrosion and tribological behavior of electroless Ni–P–CNT composite coating

Alishahi, Mostafa; Monirvaghefi, S. M.; Saatchi, A.; Hosseini, Seyed Mehdi

doi:10.1016/j.apsusc.2011.10.067

Cited by 160 publications

(83 citation statements)

References 29 publications

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“…Protective coatings have attracted scientific interest for decades due to their potential to increase resistance to wear and corrosion, which are estimated to account for 3-4% of the world's Gross [16] and CNTs [17] were incorporated into Ni-P coatings to enhance their mechanical and tribological…”

Section: Introductionmentioning

confidence: 99%

“…Optimised Ni-P coatings are well suited for general applications, especially in corrosive environments, but their hardness and wear resistance are still inadequate for more demanding situations. Hence, various reinforcing particles such as SiC [9,10], TiN [11], TiO2 [12], SiO2 [13], WC [14], Al2O3 [15], B4C [16] and CNTs [17] were incorporated into Ni-P coatings to enhance their mechanical and tribological properties. As reported in Table 1, incorporation of reinforcing particles increases the hardness of Ni-P coatings, especially when SiC particles were used.…”

Section: Introductionmentioning

confidence: 99%

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Effect of annealing temperature on microstructure, mechanical and tribological properties of nano-SiC reinforced Ni-P coatings

Wang

Callisti

Greer

et al. 2016

Wear

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Abstract:The tribological properties of Ni-P/SiC nanocomposite coatings annealed at different temperatures (350-500 °C) were investigated in order to determine the optimal temperature needed to enhance their wear resistance as well as to reveal the underlying wear mechanisms. With increasing annealing temperature, the hardness of the annealed coatings gradually decreased from 8.2±0.5 to 7.1±0.6 GPa as a result of the Hall-Petch effect, nevertheless these values obtained were constantly higher than that of the as-plated coating (6.3±0.3 GPa) due to the formation of a hard Ni3P phase.Regarding to tribological properties, the Ni-P/SiC coating annealed at 350 °C presented a poorer wear resistance (6.1×10 -5 mm 3 /Nm) compared to the as-plated coating (3.9×10 -5 mm 3 /Nm) owing to a rougher original contact surface and the subsequent generation of nickel and iron oxides on the wear track. In contrast, coatings annealed at temperatures ranging between 400-500 °C exhibited the improved wear resistance (4.3×10 -5 -7.8×10 -6 mm 3 /Nm) attributable to their smoother surfaces and to the lubrication effect of H3PO4 arising from the tribochemical reaction between Ni3P and the environment. Overall, the Ni-P/SiC coating annealed at 500 °C containing the largest amount of Ni3P exhibited the lowest friction coefficient (0.51) and wear rate (7.8×10 -6 mm 3 /Nm).Keywords: Nickel-phosphorus; SiC; Electroplating; Tribology; Annealing. IntroductionProtective coatings have attracted scientific interest for decades due to their potential to increase resistance to wear and corrosion, which are estimated to account for 3-4% of the world's Gross [16] and CNTs [17] were incorporated into Ni-P coatings to enhance their mechanical and tribologicalproperties. As reported in Table 1, incorporation of reinforcing particles increases the hardness of Ni-P coatings, especially when SiC particles were used. Moreover, studies [18,19] have demonstrated that the incorporation of SiC particles in a Ni-P matrix is the most effective combination of cost and performance in industrial applications.Regarding Ni-P/SiC composite coatings, SiC particles with a size ranging between 0.5-6.0 µm was mostly used [20][21][22][23][24][25], while only a few studies investigated the use of nano-sized SiC particles (40-50 nm) [26][27][28][29][30][31][32]. However, it is worth noting that these studies investigated only the effects of SiC nanoparticles on the microstructures, corrosion resistance [26][27][28][29][30] and wear resistance of the as-plated coatings [31,32]. Therefore, there is still a large gap in the relationship between microstructure, mechanical and tribological properties of Ni-P/(nano)SiC coatings. In particular, the effects of postdeposition heat treatments on the tribological properties is still unexplored.In this study, SiC particles with a nanometric size were incorporated in Ni-P coatings, and the effects of different annealing temperatures on the microstructure, mechanical and tribological properties of the composite coatings was investigated and...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of annealing temperature on microstructure, mechanical and tribological properties of nano-SiC reinforced Ni-P coatings

Wang

Callisti

Greer

et al. 2016

Wear

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“…In addition, impurities such as silica and amorphous carbon should be removed. Mostly, an acidic solution is recommended for the pretreatment of CNTs/MWCNTs, and it eliminates these impurities [6][7][8][9][10][11][12]. In addition, it helps to introduce carboxyl, aldehyde, and other oxygen-containing functional groups on the surface of the CNTs/MWCNTs [7,8].…”

Section: Challenges and Issues On Particle Incorporation In El Ni-p Nmentioning

confidence: 98%

“…Ball milling is suggested as an option to decrease the length of the CNTs/MWCNTs. Ball milling using hardened steel balls (~12 mm ∅) as the milling medium, with a weight ratio of the steel balls to CNTs/MWCNTs as 50:1, at 200-500 rpm for 10-20 h makes the CNTs/MWCNTs shorter and straighter [7,10,12]. The TEM images of MWNTs after acid treatment and subsequent ball milling are shown in Fig.…”

Section: Challenges and Issues On Particle Incorporation In El Ni-p Nmentioning

confidence: 99%

Electroless Nanocomposite Coatings: Synthesis, Characteristics, and Applications

T.S.N.¹,

Seshadri²,

Park³

et al. 2015

Handbook of Nanoelectrochemistry

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This chapter presents an overview of electroless (EL) Ni-P nanocomposite coatings, focusing on their preparation, challenges, and issues on particle incorporation in the metal matrix in terms of dispersibility of nanoparticles in the plating bath, interaction between the nanoparticles and the EL Ni-P matrix during deposition, influence of incorporation of nanoparticles on the characteristics of EL Ni-P nanocomposite coatings, and applications of EL Ni-P nanocomposite coatings.

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“…In order to improve the wear resistance performance of nickel based composite coatings, it is necessary to find new and better reinforcements. It was proved that carbon materials, such as, graphite powder [9,10], CNTs [11,12] and especially graphene [13][14][15], are excellent strengthening materials for many composites and composite coatings.…”

Section: Introductionmentioning

confidence: 99%

Wear and Friction Property of Laser Sintered Graphene Nickel Composite Coating

Hu¹,

Shao²,

Chen³

et al. 2017

Proceedings of the 2017 2nd International Conference on Automation, Mechanical Control and Computational Engineering (AMCCE 201

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Abstract. Graphene sheets and nickel powder were dispersed into Polyvinyl Alcohol (PVA) solution by magnetic stirring, and then pre-coating the mixed solution on the polished AISI4140 substrate. And after laser sintering, graphene nickel composite coating was successfully fabricated. Microstructures and composition of the composite coating before and after wear and friction experiments was studied by using Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM), Energy Dispersive Spectrometer (EDS) and Raman spectroscopy. Raman spectrum, SEM and TEM results proved that graphene sheets were dispersed in the composite coating. Nano indentation test results showed that graphene nickel composite coating had been greatly strengthened, and for pure nickel coating, the average friction coefficient was 0.35, while for the 10% graphene nickel coating, it was reduced to 0.13.

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The effect of carbon nanotubes on the corrosion and tribological behavior of electroless Ni–P–CNT composite coating

Cited by 160 publications

References 29 publications

Effect of annealing temperature on microstructure, mechanical and tribological properties of nano-SiC reinforced Ni-P coatings

Effect of annealing temperature on microstructure, mechanical and tribological properties of nano-SiC reinforced Ni-P coatings

Electroless Nanocomposite Coatings: Synthesis, Characteristics, and Applications

Wear and Friction Property of Laser Sintered Graphene Nickel Composite Coating

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