Abstract: An adhesion promoter layer for joining a high-temperature protection layer to a substrate includes a first layer of a first adhesion promoter material, provided for application to the substrate, and a second layer, arranged on the first layer and including a second adhesion promoter material having additionally introduced oxide dispersions, which is provided for joining a high-temperature protection layer.

Abstract: Storage material, for storing electrical energy by reduction or oxidation of an active component, comprises the active component in at least a reduced and/or oxidized form and a reactive framework structure that is capable of chemically integrating at least one form of the active component in the form of a mixed oxide or an alloy into the reactive framework structure during the charging or discharging process. In the case of an oxidic framework structure, said integration can occur by formation of at least one stable mixed oxide of the active component and an oxide from the framework structure. In the case of the metallic framework structure, said integration can occur by forming an alloy of active component and at least one metal of the framework structure.

Abstract: A storage material for storing electrical energy by reduction or oxidation of an active component, wherein the storage material, in addition to the active component, additionally has a reactive framework structure in at least a reduced and/or oxidized form, which is capable of chemically integrating at least one form of the active component in the form of a mixed oxide or an alloy into the framework structure during the charging or discharging process. This integration can occur in the case of an oxidic framework structure, in particular, in the formation of at least one stable mixed oxide of the active component and an oxide from the framework structure. In the ease of the metallic framework structure, the integration occurs by forming an alloy of active components and at least one metal of the framework structure. The capability of the framework structure to integrate the active component is dependent on the general conditions of temperature and oxygen partial pressure.

Abstract: An interconnector is made of ferritic chromium steel, on which a cupriferous layer is disposed. This layer prevents interdiffusion between the chromium steel and additional components with which the interconnector has direct contact. According to the state of the art, such diffusion occurs particularly if these additional components contain nickel. In addition, the interconnector may comprise a chromium-containing oxide layer as a barrier against interdiffusion. For this purpose, the interconnector steel can also be preoxidized before applying the cupriferous layer. The interconnector has a significantly longer service life than interconnectors according to the state of the art, and it has improved electrical conductivity because the electrical contact surface thereof is free of oxides and has high transverse conductivity.

Abstract: A component for high-temperature use comprises a metallic base material and a non-ferromagnetic protective layer arranged thereon, which is able to form a protective oxide layer on the component surface at temperatures between 600° C. and 1100° C. A sensor material is introduced into the protective layer, wherein, in the stated temperature range, the local magnetism, notably ferromagnetism or ferrimagnetism, at the site of the sensor material is dependent on the local concentration and/or composition of the material of the protective layer in the immediate vicinity of the sensor material and/or on the cumulative temperature-time curve at the site of the sensor material. The component can be examined non-destructively, from the outside, for the local magnetism in the protective layer, which is typically between 100 ?m and 500 ?m thick.

Abstract: Alloys containing aluminium are characterised by an outstanding oxidation resistance at high temperatures, that is based on, inter alia, the formation of a thick and slow-growing aluminium oxide layer on material surfaces. If the formation of the aluminium oxide layer reduces the aluminium content of the alloy so far that a critical aluminium concentration is not reached, no other protective aluminium oxide layer can be formed. This leads disadvantageously to a very rapid breakaway oxidation, and the destruction of the component. This effect is stronger at temperatures above 800° C. due to the fact that, often at this point, metastable Al2O3 modifications, especially ?- or ?-Al2O3, are formed instead of ?-Al2O3 that is generally formed at high temperatures. The above-mentioned oxide modifications are disadvantageously characterised by significantly higher growth rates.

Abstract: A component with a substrate and a protective layer is provided. The protective layer consists of an intermediate NiCoCrAlY layer zone on or near the substrate and an outer layer zone arranged on the intermediate NiCoCrAlY layer zone, wherein the outer layer zone has the structure of the phase ?-NiAl and comprises in a weight percentage: 17%-23% Al, 6%-11% Co, and Ni balance.

Abstract: The invention relates to a component having a substrate and a protective layer, which consists of an intermediate NiCoCrAlY layer zone on or near the substrate and an outer layer zone which is arranged on the intermediate NiCoCrAlY layer zone, which is characterized in that the intermediate NiCoCrAlY layer zone comprises of (in wt %): 11-13% Co, 20-23% Cr, 10.2-11.5% Al, 0.3-0.5 Y, 1.0-2.5% Re and Ni balance.

Abstract: The invention relates to a component having a substrate and a protective layer, which consists of an intermediate NiCoCrAlY layer zone on or near the substrate and an outer layer zone which is arranged on the intermediate NiCoCrAlY layer zone, which is characterized in that the intermediate NiCoCrAlY layer zone comprises of (in wt %): 24-26% Co, 16-18% Cr, 9.5-11% Al, 0.3-0.5 Y, 1-1.8% Re and Ni balance.

Abstract: An interconnector is made of ferritic chromium steel, on which a cupriferous layer is disposed. This layer prevents interdiffusion between the chromium steel and additional components with which the interconnector has direct contact. According to the state of the art, such diffusion occurs particularly if these additional components contain nickel. In addition, the interconnector may comprise a chromium-containing oxide layer as a barrier against interdiffusion. For this purpose, the interconnector steel can also be preoxidized before applying the cupriferous layer. The interconnector has a significantly longer service life than interconnectors according to the state of the art, and it has improved electrical conductivity because the electrical contact surface thereof is free of oxides and has high transverse conductivity.

Abstract: Provided is a ferritic steel that is particularly creep-resistant at temperatures from 600 to 1000° C. The ferritic steel comprising precipitations of an intermetallic phase of the Fe2(M, Si)-type or Fe7(M, Si)s-type, wherein M is a metal, particularly niobium, molybdenum, tungsten and/or tantalum. The precipitations being formed at high temperatures. The alloy can additionally comprise chromium. The steel can be used, among other things, for the bipolar plate in a stack of high-temperature fuel cells.

Abstract: Alloys containing aluminium are characterised by an outstanding oxidation resistance at high temperatures, that is based on, inter alia, the formation of a thick and slow-growing aluminium oxide layer on material surfaces. If the formation of the aluminium oxide layer reduces the aluminium content of the alloy so far that a critical aluminium concentration is not reached, no other protective aluminium oxide layer can be formed. This leads disadvantageously to a very rapid breakaway oxidation, and the destruction of the component. This effect is stronger at temperatures above 800° C. due to the fact that, often at this point, metastable Al203 modifications, especially ?- or ?-Al203, are formed instead of ?-Al203 that is generally formed at high temperatures. The above-mentioned oxide modifications are disadvantageously characterised by significantly higher growth rates.

Abstract: A method is disclosed for producing a protective coating on a chromium oxide-forming substrate, which comprises the steps of: (a) applying on the chromium-oxide-forming substrate having at least one alloying addition selected from the group consisting of manganese, magnesium, and vanadium, a coating consisting essentially of at least one spinel-forming element selected from the group consisting of cobalt, nickel, copper and vanadium, (b) forming a chromium oxide layer at the substrate/applied coating interface, and (c) at a temperature of 500° C. to 1000° C. causing the diffusion of the at least one alloying addition through the chromium oxide layer and forming a compound thereof with the at least one spinel-forming element diffusing from the applied coating and forming between the chromium oxide layer on the substrate and the applied coating, a uniform, compact, adherent chromium-free gas-tight spinel layer.

Abstract: An oxidation resistant component is disclosed comprising a substrate and a protective layer.

Abstract: MCrAl layers according to prior art often display chipping of the thermally grown aluminum oxide layer (TGO) as a result of thermally induced stresses, which significantly reduces the oxidation behavior or the bonding behavior of ceramic heat insulating layers. An inventive MCrAl layer is designed in such a way that the TGO created thereon is microporous and thus allows expansion. The microporosity of the TGO is ensured by adding elements into the MCrAl layer in a targeted manner.

Abstract: An alloy on the basis of .gamma.-TiAl with an addition of the elements Re and Pd, which have a low oxygen affinity and/or one of elements X consisting of Ag, Cu, and Au, which are capable of forming compounds of the type AlX.sub.4 with aluminum and, if present, are present in the amounts of 2.5-20 At- % Re, 5-20 At- % Cu, or 5-20 At- % Ag, such an alloy having excellent oxidation resistance in combination with low density and high strength.

Abstract: A titanium aluminide component is disclosed based on intermetallic phases of the system titanium-aluminum and having an aluminum content between 42 at. Percent and 53 at. Percent. The titanium aluminide component has on its surface a lamellar, eutectoid Ti.sub.3 Al/TiAl structure. Also disclosed is a process for preparing the titanium aluminide component.