| abstract |
An object of this invention is to provide the aluminum composite material excellent in the adhesiveness of a support body and a support. The aluminum composite material of the present invention is an aluminum composite material having an aluminum substrate including an oxide film having an oxide film on at least a part of the surface of the aluminum substrate, and a supporting material supported on the surface of the aluminum substrate including an oxide film, wherein the average film thickness of the oxide film is The surface of the oxide film side of an aluminum base material whose surface of the oxide film side of 1 nm or more and less than 100 nm contains a concave-convex structure having an average opening diameter of more than 5 μm and 100 μm or less, a concave-convex structure comprising a concave portion of an average opening diameter of more than 0.5 μm and 5 μm or less, and an average opening diameter It is an aluminum composite material which has at least 1 uneven structure chosen from the group which consists of an uneven structure containing the recessed part which is more than 0.01 micrometer and 0.5 micrometer or less. |