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Open AccessArticle

Carbon Fiber Reinforced Carbon–Al–Cu Composite for Friction Material

School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China
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Author to whom correspondence should be addressed.
Materials 2018, 11(4), 538; https://doi.org/10.3390/ma11040538
Received: 25 January 2018 / Revised: 29 March 2018 / Accepted: 29 March 2018 / Published: 31 March 2018
(This article belongs to the Section Carbon Materials)
A carbon/carbon–Al–Cu composite reinforced with carbon fiber 2.5D-polyacrylonitrile-based preforms was fabricated using the pressureless infiltration technique. The Al–Cu alloy liquids were successfully infiltrated into the C/C composites at high temperature and under vacuum. The mechanical and metallographic properties, scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive spectroscopy (EDS) of the C/C–Al–Cu composites were analyzed. The results showed that the bending property of the C/C–Al–Cu composites was 189 MPa, whereas that of the pure carbon slide material was only 85 MPa. The compressive strength of C/C–Al–Cu was 213 MPa, whereas that of the pure carbon slide material was only 102 MPa. The resistivity of C/C–Al–Cu was only 1.94 μΩm, which was lower than that of the pure carbon slide material (29.5 μΩm). This finding can be attributed to the “network conduction” structure. Excellent wettability was observed between Al and the carbon matrix at high temperature due to the existence of Al4C3. The friction coefficients of the C/C, C/C–Al–Cu, and pure carbon slide composites were 0.152, 0.175, and 0.121, respectively. The wear rate of the C/C–Al–Cu composites reached a minimum value of 2.56 × 10−7 mm3/Nm. The C/C–Al–Cu composite can be appropriately used as railway current collectors for locomotives. View Full-Text
Keywords: microstructure; flexural properties; electrical properties; friction coefficient; aluminum–copper alloy microstructure; flexural properties; electrical properties; friction coefficient; aluminum–copper alloy
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Cui, L.; Luo, R.; Ma, D. Carbon Fiber Reinforced Carbon–Al–Cu Composite for Friction Material. Materials 2018, 11, 538.

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