Abstract: A composite membrane is provided having a flexible metallic substrate for separation of hydrogen from gas mixtures, which achieves a separation ratio of hydrogen to nitrogen of greater than about 4,000 at operating temperatures higher than 300° C. The composite membrane has a layer system arranged on at least one surface of the substrate, the layer system having a rigid, non-self-supporting, nonmetallic inorganic diffusion barrier layer adjacent the substrate, and at least one hydrogen-permeable, nonporous, metallic membrane on the side of the barrier facing away from the substrate. A method for production of such a composite membrane is also provided in which the diffusion barrier layer adjoining the membrane layer is formed by PVD, CVD, sol-gel process, or sintering-on powder particles, and the membrane layer is electrodeposited on the diffusion barrier layer.

Abstract: A composite membrane is provided having a flexible metallic substrate for separation of hydrogen from gas mixtures, which achieves a separation ratio of hydrogen to nitrogen of greater than about 4,000 at operating temperatures higher than 300° C. The composite membrane has a layer system arranged on at least one surface of the substrate, the layer system having a rigid, non-self-supporting, nonmetallic inorganic diffusion barrier layer adjacent the substrate, and at least one hydrogen-permeable, nonporous, metallic membrane on the side of the barrier facing away from the substrate. A method for production of such a composite membrane is also provided in which the diffusion barrier layer adjoining the membrane layer is formed by PVD, CVD, sol-gel process, or sintering-on powder particles, and the membrane layer is electrodeposited on the diffusion barrier layer.

Abstract: The invention relates to a metal component for discharge lamps, having a support of niobium or tantalum or of alloys based on niobium and/or tantalum, as well as a discharge lamp. The present invention is addressed to the problem of increasing the resistance to oxidation and corrosion of metal components having a support of niobium or tantalum or of alloys based on niobium and/or tantalum which are disposed in or on discharge lamps. The problem is solved according to the invention in that the support has a coating of one or more single layers which is formed of at least one noble metal and/or from a noble metal alloy.

Abstract: A support structure is provided for holding open lumina, the support structure having a stainless steel substrate and a platinum layer forming the surface of the structure. The structure has at least one gold layer arranged between the substrate and the platinum layer. The platinum layer is preferably applied with a pulsed current with current reversal, in order to avoid or reduce brittleness occurring by absorption of hydrogen during galvanic deposition of platinum. Such a support structure (stent) substantially withstands the high mechanical stresses, particularly bending and torsional forces that occur during application, without the formation of significant tears in the platinum layer.