Metal Matrix Nanocomposites Reinforced with Carbon Nanotubes

Koppad, Praveennath G.; Singh, Vikas Kumar; Ramesh, C.S.; Koppad, Ravikiran G.; Kashyap, K. T.

doi:10.1002/9781118895399.ch9

Cited by 10 publications

(4 citation statements)

References 95 publications

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“…These metal matrix nanocomposites are generally fabricated by liquid metallurgy, powder metallurgy, Electroless plating and Spray techniques like Cold spray, High Velocity Oxyfuel and plasma spray. Out of all techniques, powder metallurgy is most widely used processing technique to fabricate the nanocomposites, in which Al, Cu, Mg, Ni, Ti and Ag are used as matrix materials [11]. Due to friction and wear the transport industry faces many problems like premature failure of components and high maintenance costs.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of copper nanocomposites reinforced with uncoated and nickel coated carbon nanotubes

Koti¹,

George²,

Shakiba³

et al. 2018

FME Transactions

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Carbon nanotubes have emerged as potential reinforcement material for metallic matrices since their discovery in 1991 by Japanese scientist Sumo Iijima. It is observed that carbon nanotubes were comprised of multifunctional properties and were ideal reinforcement material for metallic matrices. In the present work we report the development of carbon nanotubes with multi-walls reinforced commercial purity copper nanocomposites. The carbon nanotubes content was varied from 0.25 to 1.0 wt% in the copper matrix nanocomposites. Here, carbon nanotubes were also nickel coated for improving the interfacial bonding with the copper matrix. In order to obtain the good dispersion of carbon nanotubes in the copper matrix, both materials were subjected to ultrasonication and blending process using ball milling. Further sintered nanocomposites were subjected to upsetting forging process, which involves densification and shape change simultaneously. Microstructure studies were conducted using scanning and transmission electron microscopes to study the dispersion of carbon nanotubes. The effect of carbon nanotubes on the mechanical properties like microhardness and tensile strength of copper matrix nanocomposites is studied in detail.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties of copper nanocomposites reinforced with uncoated and nickel coated carbon nanotubes

Koti¹,

George²,

Shakiba³

et al. 2018

FME Transactions

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“…19 Several studies have been undertaken to investigate the effects of CNTs and SiC on copper composites to improve density, reduce porosity in coatings, and increase their hardness. 20,21 The nickel-based coatings such as Ni 3 Ti and Cr 3 C 2 -25NiCr + Ni 3 Ti achieve better cohesion strength, less than 2% porosity in the coatings and coated samples with higher corrosion resistance than uncoated samples. 22,23 The NiCrBSi/flyash + Cr 2 O 3 , and NiCrBSi/flyash + Mo advanced coatings using the APS technique have higher microhardness and a lower coefficient of friction.…”

Section: Introductionmentioning

confidence: 99%

Hot-corrosion behaviour of CNT reinforced Cr₃C₂-NiCr coatings working under high-temperature sprayed by HVOF method

Kuruba¹,

Gaikwad²,

Shivalingappa³

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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The thermal power plant boiler tubes experience degradation of their surfaces due to oxidation and molten salt corrosion while working at elevated temperatures. The formation of protective coating layers can overcome such surface degradation. In the current research, protective coated layers composed of Cr3C2-25% NiCr/Carbon nanotube coatings are deposited on the ASTM SA-213T12 boiler tube substrate by the High-Velocity Oxy-Fuel (HVOF) thermal method. The coating powder Cr3C2-25%NiCr is reinforced with 3, 5 and 7 wt% of Multi-Wall Carbon Nano-Tube (MWCNT) prior to deposition. The uncoated and coated specimens are evaluated for hot corrosion behaviour in the molten salt environment (Na2SO4 + 60%V2O5) for 50 cycles, constituting 1 h of heating at 600 °C. Thermogravimetric analysis is used to investigate the kinetics of hot corrosion behaviour in both coated and uncoated samples. Coatings are characterized with the help of X-ray diffraction and Scanning Electron Microscope/Energy Dispersive Spectroscopy (SEM/EDS) techniques. Microstructural investigations with the help of SEM/EDS and X-ray diffraction of coated and uncoated samples revealed that 7 wt% of CNT coated samples minimized the voids and pores of the coatings, leading to better interlocking with the substrate surface. Furthermore, it is observed in the studies that the appreciable corrosion resistance of 7 wt% of CNT composite coatings is higher than 3 and 5 wt% of CNT-coated and uncoated samples.

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“…This one-dimensional material is ideal for the development of energy storage, semiconductor electronics, thermal interface materials, desalination, reinforcing phase for metal/polymer/ceramic nanocomposites, and heat sink applications. [19][20][21][22][23] For instance, electrical applications need composite with good conductivity and wearresistant properties. Few works have reported the addition of CNTs to aluminum and copper hybrid composites to improve their electrical conductivity, lowering friction coefficient, and enhancing wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of carbon nanotubes on microhardness and adhesion strength of high-velocity oxy-fuel sprayed NiCr–Cr₃C₂ coatings

Kuruba¹,

Gaikwad²,

Natarajan

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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NiCr–Cr3C2 coatings are widely used for high temperature and tribological applications due to their high hardness, oxidation, and wear resistance properties. In the present investigation, an attempt is made to further enhance the hardness and adhesion strength of NiCr–Cr3C2 coatings by reinforcing them with multi-walled carbon nanotubes. The carbon nanotubes (3–7 wt%) with varying weight percentages were mixed with NiCr–Cr3C2 using a planetary ball rolling mill and sprayed on SA213 T12 (T12 alloy steel tube) using a high-velocity oxy-fuel spraying process. The microstructures of mixed powder, coating cross-section, and fractured coating surface were characterized using a scanning electron microscope while X-ray diffraction was used for phase identification in the fractured coating surface. The coated samples were subjected to microhardness and adhesion strength tests according to ASTM E384 and ASTM D4541-09 standards. Out of all coatings, NiCr–Cr3C2/7% carbon nanotube composite coating showed the lowest porosity of 1.17%, highest microhardness, and adhesion strength of 563.8 HV and 55.8 MPa, respectively. A fracture analysis after a pull-off adhesion test revealed adhesion failure for NiCr–Cr3C2 coating and combined adhesion/cohesion failure for NiCr–Cr3C2/7% carbon nanotube composite coating.

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Metal Matrix Nanocomposites Reinforced with Carbon Nanotubes

Cited by 10 publications

References 95 publications

Mechanical properties of copper nanocomposites reinforced with uncoated and nickel coated carbon nanotubes

Mechanical properties of copper nanocomposites reinforced with uncoated and nickel coated carbon nanotubes

Hot-corrosion behaviour of CNT reinforced Cr₃C₂-NiCr coatings working under high-temperature sprayed by HVOF method

Effect of carbon nanotubes on microhardness and adhesion strength of high-velocity oxy-fuel sprayed NiCr–Cr₃C₂ coatings

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Metal Matrix Nanocomposites Reinforced with Carbon Nanotubes

Cited by 10 publications

References 95 publications

Mechanical properties of copper nanocomposites reinforced with uncoated and nickel coated carbon nanotubes

Mechanical properties of copper nanocomposites reinforced with uncoated and nickel coated carbon nanotubes

Hot-corrosion behaviour of CNT reinforced Cr3C2-NiCr coatings working under high-temperature sprayed by HVOF method

Effect of carbon nanotubes on microhardness and adhesion strength of high-velocity oxy-fuel sprayed NiCr–Cr3C2 coatings

Contact Info

Product

Resources

About

Hot-corrosion behaviour of CNT reinforced Cr₃C₂-NiCr coatings working under high-temperature sprayed by HVOF method

Effect of carbon nanotubes on microhardness and adhesion strength of high-velocity oxy-fuel sprayed NiCr–Cr₃C₂ coatings