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http://bura.brunel.ac.uk/handle/2438/16634
Title: | Processing, structure and thermal conductivity correlation in carbon fibre reinforced aluminium metal matrix composites |
Authors: | Miranda, AT Bolzoni, L Barekar, N Huang, Y Shin, J Ko, SH McKay, BJ |
Issue Date: | 15-Oct-2018 |
Publisher: | Elsevier |
Citation: | Materials and Design, 2018, 156 pp. 329 - 339 |
Abstract: | Al matrix composites reinforced with Cu-coated pitch-based carbon fibres (Al/Cu-CFs) were fabricated, using a novel combination of rheocasting and equal channel angular extrusion (ECAE) techniques, in order to exploit the thermal conductivity (K) of the material. Rheocasting allowed the introduction and dispersion of Cu-CFs within the Al3Mg matrix. The subsequent ECAE processing reduced the porosity of the composites from 3 to 0.03% and induced a high degree of fibre alignment within the matrix, although considerable damage to the fibres occurred during this processing step. After 6 ECAE passes, in which the billet orientation remained constant, the composite with the highest degree of fibre alignment show a thermal conductivity (K) improvement of ~20% with respect to the rheocast composite. The improvement is due to porosity reduction, improved fibre alignment and forced intimate contact of clean CF surfaces with the matrix. |
URI: | http://bura.brunel.ac.uk/handle/2438/16634 |
DOI: | http://dx.doi.org/10.1016/j.matdes.2018.06.059 |
ISSN: | 0264-1275 http://dx.doi.org/10.1016/j.matdes.2018.06.059 1873-4197 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Research Papers |
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