| 摘要 |
PROBLEM TO BE SOLVED: To provide a Cu-Pd alloy excellent in hydrogen permeability and strength at high temperature and high pressure.SOLUTION: There is provided a hydrogen permeable copper alloy represented by the composition formula:PdCuX, where X:at least one kind of Al, Ga and In, a:43 to 49 at%, b:100-a-c, c:0.02 to 2 at% and of which crystal diameter of 70% or more, preferably 90% or more of a &bgr; phase becomes 2 μm or less after treating at 300°C for 20 hours. X is Al and c is 0.2 to 2 at% in the composition formula. There are also provided a hydrogen permeation membrane made from the copper alloy and having a thickness of 1 to 200 μm, and a steam reformer using the hydrogen permeation membrane for a hydrogen separation. |
