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AssigneesFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V., Schunk Kohlenstofftechnik GmbH
InventorsStefan SIEGEL, Roland WEISS, Andreas LAUER, Gotthard NAUDITT
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The invention relates to a method for the manufacture of a ceramic component of desired final geometry using at least a cellulose-containing semi-finished moulded part, which is pyrolysed in non-oxidizing gas atmosphere. In order to manufacture complex components, it is suggested that at least two semi-finished moulded parts are firmly joined either in raw form or after at least partial carbonisation. The joined moulded parts are subsequently machined to achieve the desired final geometry or a geometry corresponding to the desired final geometry plus the machining allowance. Then, the carbon parts are available after carbonisation of the moulded parts in non-oxidizing atmosphere. Alternatively, these can be converted into a CMC composite material in a non-oxidizing gas atmosphere by a metal infiltration process with simultaneous reactive joining of at least two moulded parts.
Method for the manufacture of a ceramic component or a carbon component of desired final geometry using at least a cellulose-containing semi-finished moulded part, which is pyrolysed in non-oxidizing gas atmosphere, characterized by the fact that at least two semi-finished moulded parts are firmly bonded either in rough form or after at least partial carbonisation that the joined moulded parts help achieving the desired final geometry or an appropriate geometry machined to the final geometry plus machining allowance and available as carbon component after carbonisation in non-oxidizing gas atmosphere or are converted by a following metal infiltration process with simultaneous reactive joining of at least two moulded parts into a CMC-composite material.
Methods for the manufacture of a ceramic composite material and composite components based on it, in which prefabricated semi-finished products of resin-bound plant fibres are used as raw material, the unfinished forms manufactured from it joined with wood adhesives or released at temperatures>800° C. are carbonised, by possible additional sticking-/joining processes or impregnating processes in the carbon state and after a full carbonisation at temperatures>1000° C. by machining in the carbon condition considering necessary grinding tolerances for the ceramic finish process to final geometry and then are available as carbon products or are converted into a CMC-composite material by a subsequent metal infiltration process under air exclusion with simultaneous reactive joining of the modular structured ceramic component.
Dependencies are inferred from the claim text.