ACM (advanced composite materials)has been used in aircraft fuel tanks. Heat-conducting performances of carbon fiber epoxy composite T300 3K are studied through the following experiments: contact constant-temperature heating experiment and thermal conductivity test experiment. Contact constant-temperature heating experiments are firstly taken on 2 mm and 4mm thick T300 3K carbon fiber epoxy composites at the temperature of 150 ℃, 200 ℃, 250 ℃, 300 ℃and 350 ℃. Then, the thermal conductivities of T300 3K are tested at different temperatures under the presupposition experimental conditions. Those results are compared with the thermal conductivities of 5A02 aluminum alloy material at different temperatures. Research results show that the thermal conductivities of T300 3K is much smaller than that of 5A02 aluminum alloy. In vertical direction to the fiber,the thermal conductivity of T300 3K keeps in 10-2 magnitude. And it becomes larger with the increase of temperature. As aircraft fuel tank panel material,T300 3K is easy to occur in the case of local overheating, causing material damage, and resulting in the decrease of its strength, although the thermal insulation performance of T3003K is stronger than 5A02 aluminum alloy.
