Tribological performance of PEEK based hybrid composites reinforced with short carbon fibers and nano-silica

In this study, the tribological performances of poly-ether-ether-keton (PEEK) hybrid composites reinforced with short carbon fibers (SCF) (20vol%) and surface modified nano-SiO2 particles (1, 1.5 and 2wt%) were examined. Composites were fabricated by melt-mixing process at 400°C. The polymer was in...

Full description

Saved in:
Bibliographic Details
Published in:Wear 2013-06, Vol.303 (1-2), p.397-404
Main Authors: Molazemhosseini, A., Tourani, H., Khavandi, A., Eftekhari Yekta, B.
Format: Article
Language:English
Subjects:
Applied sciences
Carbon fibers
Exact sciences and technology
Friction
Hardness
Hybrid composites
Mechanical properties
Nanocomposites
Nanomaterials
Nanostructure
Particulate composites
Physical properties
Polyetheretherketones
Polymer industry, paints, wood
Polymer-matrix composite
Properties and testing
Scanning electron microscopy
Sliding wear
Technology of polymers
Three-body abrasion
Tribology
Wear testing
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this study, the tribological performances of poly-ether-ether-keton (PEEK) hybrid composites reinforced with short carbon fibers (SCF) (20vol%) and surface modified nano-SiO2 particles (1, 1.5 and 2wt%) were examined. Composites were fabricated by melt-mixing process at 400°C. The polymer was in granulated shape, the original length of fibers was 6mm and the size of nano-SiO2 particles was 13nm. Micro-hardness tests were performed and presented a significant increase in hardness of the composites due to the presence of SCFs and nano-SiO2 particles. The effects of nano-SiO2 content on tribological properties of PEEK/SCF/nano-SiO2 composites were investigated. Tribological tests were carried out in 2, 3.75, 6.25 and 10MPa normal pressures using pin-on-disk configuration. All of the tests were performed at room temperature in dry sliding condition at sliding velocity of 0.25m/s. In order to investigate the wear mechanisms involved in different tribological conditions, worn surfaces were examined using scanning electron microscopy (SEM). Under all applied pressures, incorporation of nano-SiO2 particles remarkably reduced the friction coefficients. Also increasing the nanoparticles content led to decrease in friction coefficients in nearly all conditions. However, in terms of the enhancement in wear resistance of the composites, there was a strong dependence on the applied pressure. •Tribological performance of PEEK/SCF/nano-SiO2 investigated using pin-on-disc method.•Incorporation of 2wt% nanoparticles significantly reduced the friction coefficients under all normal pressures.•Under contact pressure lower than 3.75MPa, nanoparticles agglomerates act as third body abrasive materials.•Wear mechanisms were investigated by SEM.
ISSN:0043-1648
1873-2577
DOI:10.1016/j.wear.2013.03.019