Effect of flake powder metallurgy on thermal conductivity of graphite flakes reinforced aluminum matrix composites

The optimization of metal–matrix composite material is linked firstly with the intrinsic properties of the matrix and the reinforcement used and secondly with the reinforcement–matrix interfacial zone and the distribution/orientation of the reinforcement inside the metal–matrix. Flake powder metallu...

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Bibliographic Details
Published in:Journal of materials science 2018-06, Vol.53 (11), p.8180-8192
Main Authors: Chamroune, Nabil, Mereib, Diaa, Delange, Florence, Caillault, Nathalie, Lu, Yongfeng, Grosseau-Poussard, Jean-Luc, Silvain, Jean-François
Format: Article
Language:English
Subjects:
Aluminum
Aluminum base alloys
Aluminum flakes
Aluminum matrix composites
Casting
Characterization and Evaluation of Materials
Chemical Sciences
Chemistry and Materials Science
Classical Mechanics
Composite materials
Composites
Condensed Matter
Crystallography and Scattering Methods
Graphite
Heat conductivity
Heat transfer
Hot pressing
Incompatibility
Material chemistry
Materials Science
Metal powders
Morphology
Optimization
Physics
Polymer Sciences
Powder metallurgy
Powdered metal products
Reinforcement
Solid Mechanics
Spherical powders
Structural damage
Thermal conductivity
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Summary:The optimization of metal–matrix composite material is linked firstly with the intrinsic properties of the matrix and the reinforcement used and secondly with the reinforcement–matrix interfacial zone and the distribution/orientation of the reinforcement inside the metal–matrix. Flake powder metallurgy was used to fabricate graphite flake reinforced aluminum matrix (Al/GF) composites fabricated by vacuum hot pressing. Two types of aluminum powders morphology were used: spherical (Al S ) and flake (Al F ) powders. A higher thermal conductivity in the in-plane direction of the graphite flakes was obtained for Al/GF composite materials fabricated with aluminum flake powder. In addition to a better orientation of the GF in the flake aluminum matrix, a 3D puckered surface and plane surface are formed at the Al/GF interface in, respectively, Al S /GF and Al F /GF composite materials. Due to the morphology incompatibility between the graphite flakes and the spherical powder, the damaged inner structure of GF contributes to a limited enhancement of thermal conductivity in Al S /GF composite materials.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-018-2139-1