| abstract |
An object of the present invention is to provide an aluminum composite material having excellent adhesiveness between a support and a supported substance. The aluminum composite material of an embodiment of the present invention is an aluminum composite material having an oxide film-including aluminum base material having an oxide film on at least a part of a surface of an aluminum base material and a supported substance supported on the surface of the oxide film-including aluminum base material, in which an average film thickness of the oxide film is 1 nm or more and less than 100 nm, and the oxide film-side surface of the aluminum base material has at least one roughened structure selected from the group consisting of a roughened structure including concave portions having an average opening diameter of more than 5 μm and 100 μm or less, a roughened structure including concave portions having an average opening diameter of more than 0.5 μm and 5 μm or less, and an uneven structure including concave portions having an average opening diameter of more than 0.01 μm and 0.5 μm or less. |