초록 ▼

A process for the production of sandwich structures made of fiber-reinforced ceramics, the base substance of the ceramic matrix consisting of a Si-organic polymer and a ceramic or metallic powder. A cross-linking of the Si-organic polymer takes place under increased pressure and at an increased temp

A process for the production of sandwich structures made of fiber-reinforced ceramics, the base substance of the ceramic matrix consisting of a Si-organic polymer and a ceramic or metallic powder. A cross-linking of the Si-organic polymer takes place under increased pressure and at an increased temperature. After the joining of the facings and the honeycomb core, the sandwich structure is pyrolysed to form a ceramic material.

대표청구항 ▼

A process for the production of a sandwich structure with facings and a honeycomb core made of fiber-reinforced ceramics comprising the steps of: impregnating inorganic fibers or wovens with a slip comprising at least a Si-organic polymer and a ceramic or metallic powder; molding facings; molding a

A process for the production of a sandwich structure with facings and a honeycomb core made of fiber-reinforced ceramics comprising the steps of: impregnating inorganic fibers or wovens with a slip comprising at least a Si-organic polymer and a ceramic or metallic powder; molding facings; molding a honeycomb core by placing or winding the impregnated woven or fibers on respective mold cores; partially cross-linking said at least a Si-organic polymer to form a preceramic matrix, by pressure and temperature treatment of said facings and said honeycomb core; removing said mold cores from said honeycomb core; joining said facings and said honeycomb core to form said sandwich structure by complete cross-linking of said Si-organic polymer of said preceramic matrix by means of pressure and temperature treatment; no-pressure pyrolysis for conversion of said preceramic matrix into a ceramic material.