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Research Papers: Micro-Nano Tribology

Tribological, Mechanical, and Microstructural of Multiwalled Carbon Nanotubes/Short Carbon Fiber Epoxy Composites

[+] Author and Article Information
O. J. Gbadeyan, Mohan Turup Pandurangan

Composites Research Group,
Department of Mechanical Engineering,
Durban University of Technology,
Durban 4001, South Africa

Krishnan Kanny

Composites Research Group,
Department of Mechanical Engineering,
Durban University of Technology,
Durban 4001, South Africa
e-mail: kannyk@dut.co.za

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received March 23, 2017; final manuscript received July 12, 2017; published online September 29, 2017. Assoc. Editor: Dae-Eun Kim.

J. Tribol 140(2), 022002 (Sep 29, 2017) (6 pages) Paper No: TRIB-17-1107; doi: 10.1115/1.4037357 History: Received March 23, 2017; Revised July 12, 2017

In the present work, composites were developed with novel combination of particular fillers and fibers for an automotive brake system. The influence of short carbon fiber (SCF) on wear rate, coefficient of friction (CoF), modulus, compressive strength, hardness, and surface morphology of worn surface were examined. This investigation confirmed that 0.1% multiwalled carbon nanotubes (MWCNTs) reduced wear rate, CoF for all combinations of composite with carbon fiber. Results indicate that 0.1% (MWCNTs) and 10% SCF-filled composite had superior properties. This performance may be attributed to the uniform dispersion of fiber and the synergistic effect of SCF and MWCNTs, acting in concert that formed a more stable structure resulting in a high strength, stiffness, tougher, and high-heat absorption. Scanning electron microscopy (SEM) microstructure subsequently performed show change in structural development with a corresponding increase of the incorporation of SCF and MWCNTs, which eventually explained the improved properties of composite.

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Figures

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Fig. 1

In-house built pin-on-disk tribometer

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Fig. 2

Wear rate of epoxy resin, epoxy multiwalled carbon nanotube, epoxy carbon fiber, and epoxy carbon fiber/multiwalled carbon nanotube composites

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Fig. 3

Coefficient of friction of epoxy resin, epoxy carbon fiber, and epoxy carbon fiber/multiwalled carbon nanotube composites

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Fig. 4

Representation of composites reinforced with (a) SCFs and (b) SCF and MWCNTs [18]

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Fig. 5

Compressive modulus of epoxy resin, epoxy carbon fiber, and epoxy carbon fiber/multiwalled carbon nanotube composites

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Fig. 6

Compressive strength of epoxy resin, epoxy carbon fiber, and epoxy carbon fiber/multiwalled carbon nanotube composites

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Fig. 7

Hardness of epoxy resin, epoxy carbon fiber, and epoxy carbon fiber/multiwalled carbon nanotube composites

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Fig. 8

SEM images of composite sample before and after wear investigation; epoxy resin (a), (b) 0.1 CNTs (c) 5 wt. %, (d) 10 wt. %, (e) 15 wt. %, (f) 20 wt. %, (g) 5 wt. % CF + 0.1 wt. % CNTs, (h) 10 wt. % + 0.1 wt. % CNTs, (i) 15 wt. % + 0.1 wt. % CNTs, and (j) 20 wt. % + 0.1 wt. % CNTs composites

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