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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: 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.
ISSN: 0264-1275
Appears in Collections:Dept of Mechanical Aerospace and Civil Engineering Embargoed Research Papers

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