Elringklinger Ag

Deutsche Forschungs- Und Versuchsanstalt Fur Luft- Und Raumfahrt E.v.

Deutsches Zentrum Fur Luft-und Raumfahrt E.v.

Rudolf Henne

Hans-Rainer Zerfass

Rolf Prummer

Johannes Arnold

A method is provided for producing an electrically insulating sealing arrangement for a fuel cell stack which comprises a plurality of fuel cell units that succeed one another along a stack direction by means of which the housings of the fuel cell units are connectable to one another in such a way that an adequate electrically insulating effect and adequate mechanical rigidity are ensured even at the high operating temperature. The method involves producing a ceramic metal layer and at least partially converting the metal of the ceramic metal layer into an electrically non conductive compound so as to produce a non conductive boundary layer.

Method of producing a sealing arrangement for a fuel cell stack and a sealing arrangement for a fuel cell stack

A compound material for temperatures up to about 1250.degree. C. or 1350.degree. C., respectively, and a method for producing the same, are disclosed, including a pair of joined layers one of which is a corrosion- and high-temperature-resistant alloy, the other layer consisting of a refractory material with high strength at high temperatures. The layer having the weaker mechanical strength at high temperatures is thinner than the other layer, the ratio of layer thickness preferably being between 1:5 and 1:2. A further alloy layer may be provided on the opposite side of the refractory layer, thereby to define a three-layer laminate. A thin layer of diffusion barrier material, such as platinum or palladium, may be provided between the refractory and alloy layers. The method for producing the laminate includes the step of detonating an explosive layer to exposively clad the alloy layer on to the refractory layer.

Growing community of inventors

Böblingen, Germany

Rudolf Henne