▎ 摘　　要

NOVELTY - Direct preparation of graphene/metal or alloy composite material comprises e.g. removing the oxide layer of the metal or alloy surface, specifically by placing metal or alloy in the constant temperature heating area of the chemical vapor deposition (CVD) reaction furnace quartz tube and vacuumizing to below 1Pa, inletting protective gas into the quartz tube repeatedly to wash for 5-3 times to ensure no air in the quartz tube, then opening the CVD reaction furnace, raising the temperature to the set temperature, then filling protective gas and a reducing gas into the quartz tube. USE - The method is useful for direct preparation of graphene/metal or alloy composite material (claimed). ADVANTAGE - The method overcomes the defect of the common graphene synthesis, separation, transfer and target material problem caused by the technique, realizes the quick preparation of composite material, has simple technical flow, is economical, eliminates the separation transfer process damage to the graphene quality, and reduces the process risk. DETAILED DESCRIPTION - Direct preparation of graphene/metal or alloy composite material comprises (i) removing the oxide layer of the metal or alloy surface, specifically by placing metal or alloy in the constant temperature heating area of the chemical vapor deposition (CVD) reaction furnace quartz tube and vacuumizing to below 1Pa, inletting protective gas into the quartz tube repeatedly to wash for 5-3 times to ensure no air in the quartz tube, then opening the CVD reaction furnace, raising the temperature to the set temperature, then filling protective gas and a reducing gas into the quartz tube, keeping the pressure in the quartz tube at 1-1000 Pa, removing the oxide layer of the metal or alloy surface, and (ii) in CVD reaction furnace, raising the temperature to reaction temperature, keeping the pressure in the quartz tube at 1-1000 Pa, simultaneously inletting protective gas and gas carbon source to react, the reaction temperature is more than 80 degrees C lower than the melting point of the metal or alloy, and (iii) closing the CVD reaction furnace, controlling the cooling rate of the CVD reaction furnace can control the growth of graphene, obtaining graphene/metal or alloy composite material.