CROFER 22 APU PDF

Kakinos Together with the other alloying elements titanium and manganese, the lanthan ensures that a protective coating of chromium manganese oxide forms on the surface of the interconnector plates as soon as the fuel cell becomes active. Central Press Office for Journalists. As well as making the electrical connection they also supply the cells with fuel gas and air via gas passages. During subsequent hot rolling it is important that the temperature window is observed precisely. Chromium also limits the thermal expansion of 2 alloy, giving it a similar coefficient of expansion to the surrounding ceramic xpu.

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Kakinos Together with the other alloying elements titanium and manganese, the lanthan ensures that a protective coating of chromium manganese oxide forms on the surface of the interconnector plates as soon as the fuel cell becomes active.

Central Press Office for Journalists. As well as making the electrical connection they also supply the cells with fuel gas and air via gas passages. During subsequent hot rolling it is important that the temperature window is observed precisely.

Chromium also limits the thermal expansion of 2 alloy, giving it a similar coefficient of expansion to the surrounding ceramic xpu. The SOFC is a fuel cell variant which works at temperatures up to degrees.

Home Cgofer Press releases. The aim is to use an SOFC plant as a supplement for battery and dynamo. The starting materials for energy conversion can be hydrogen, natural gas or reformed gasoline. Crofer 22 APU: new material for fuel cells — thyssenkrupp AG Crofer 22 APU, an iron-chromium alloy, for the first time fulfils the previously conflicting requirements of good high-temperature stability, high electrical conductivity and low coefficient of expansion.

Critical to this is croter 0. In the melting furnace, where several tons of the alloy are produced in one charge, minimum amounts of alloying elements have to be added in precise quantities. This so-called chromium-manganese spinel prevents chromium evaporation and at the same time assures the necessary electrical conductivity of the interconnector plates. Normally, metallic materials achieve their long-term stability at such temperatures by means of high chromium content.

Each cell contains an anode, cathode and ceramic zirconium dioxide as the electrolyte to start the power generation process. The main reason is the high operating temperature of the fuel cells. Products and solutions, While the ceramic materials used previously for the interconnector plates do not have the problem of chromium evaporation, they are unsuitable for economic volume production due to the complex production requirements involved for example in milling the passages for the gas supply.

The manufacture of Crofer 22 APU requires extreme precision at every stage of the production process. The most important components of the SOFC stack are the interconnector plates between the cells.

It can be formed without problems, given ribs or other surface structures and machined using conventional production methods and equipment. However, at temperatures of degrees, the chromium is released and destroys the electrolyte. Most 10 Related.

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A methodology of evaluating the joint strength at room temperature RT and oC was developed by testing two types of sandwich-like specimens under shear and tensile loading. The effects of joining temperature, pre-oxidization of metallic interconnect, number of initial spreading side, aging treatment, and composition of metallic interconnect on the joint strength at RT and oC were studied. The measured shear strength of the specimens joined at oC was greater than that of those joined at oC. Apparently, an increase of joining temperature could improve the joining performance due to a better wetting behavior of glass ceramic. A pre-oxidization treatment at oC for 2 h did not generate a beneficial effect on the shear and tensile joint strength for all the given testing conditions. The joint strength of specimens with a double-layer of glass-ceramic sealant was greater than that of single-layer ones due to a better wetting behavior of the GC-9 glass-ceramic sealant in contact with the metal slice during joining.

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Crofer 22 APU is characterized by:? UNS applied for W. Mechanical properties Product 0. Fabrication and heat treament Crofer 22 APU can readily be hot and cold worked and machined. Heating Workpieces must be clean and free from all kinds of contaminants before and during any heat treatment.

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Crofer 22 APU: new material for fuel cells

Neshicage The manufacture of Apy 22 APU requires extreme precision at every stage of the production process. In terms of fabrication, however, Crofer 22 APU is just as easy to handle as a standard stainless steel. Central Press Office for Journalists. Company Products Investors Newsroom.

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