Abstract
The constant increase in power and heat flux densities encountered in electronic devices fuels a rising demand for lightweight heat sink materials with suitable thermal properties. In this study, discontinuous pitch-based carbon fiber reinforced aluminum matrix (Al-CF) composites with aluminum–silicon alloy (Al–Si) were fabricated through hot pressing. The small amount of Al–Si contributed to enhance the sintering process in order to achieve fully dense Al–CF composites. A thermal conductivity and CTE of 258 W/(m K) and 7.0 × 10−6/K in the in-plane direction of the carbon fibers were obtained for a (Al95 vol% + Al–Si5 vol%)-CF50 vol% composite. Carbon fiber provides the reducing of CTE while the conservation of thermal conductivity and weight of Al. The achieved CTEs satisfy the standard requirements for a heat sink material, which furthermore possess a specific thermal conductivity of 109 W cm3/(m K g). This simple process allows the low-cost fabrication of Al–CF composite, which is applicable for a lightweight heat sink material.
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Kurita, H., Feuillet, E., Guillemet, T. et al. Simple Fabrication and Characterization of Discontinuous Carbon Fiber Reinforced Aluminum Matrix Composite for Lightweight Heat Sink Applications. Acta Metall. Sin. (Engl. Lett.) 27, 714–722 (2014). https://doi.org/10.1007/s40195-014-0106-7
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DOI: https://doi.org/10.1007/s40195-014-0106-7