[T13] Non Ferrous Materials

[15P-T13-06] Aluminum-Graphite Composites Fabricated by Spark Plasma Sintering: Thermal Conductivity, Microstructure, Mechanical Property

*B. Park^{1, 2}, M. Yang^{1, 2}, Y. Park^{1, 2}, H. Park¹ (1.Korea Institute of Industrial Technology, Korea, 2.Chonnam National University, Korea)

キーワード：Aluminum, Graphite, metal-carbon composites, spark plasma sintering, high thermal conductivity

In an effort to secure superior thermal conductivity compared to conventional metal heat-dissipating materials such as copper and aluminum, aluminum-graphite (Al-Gr) composites were prepared and then mechanical and thermal properties depending on graphite contents were closely investigated. The graphite contents were changed from 20 to 50 vol.% in order to sinter aluminum-graphite composites having different graphite content ratios. The Al-Gr composite powders mechanically synthesized by mixer milling were sintered under the following process conditions; sintering temperature of 480^oC, sintering pressure of 40 MPa, and duration of 2 minutes at the temperature of 480^oC. The relative density of the sintered body gradually decreased as the graphite content increased and showed the highest value of 94% when the Al-Gr content ratio was 8:2. Furthermore, thermal conductivity as a function of the graphite content, which is the most important indicator of this study, was systematically investigated.