Graphite powder-based composites in particular are gaining constantly in importance. In the high-temperature applications field, these composites include carbon fiber-reinforced carbon and carbon fiber- reinforced silicon carbide, as well as rigid and flexible felts based on pitch or viscose fiber.

The starting material is first converted into a non­flammable intermediate product. The filament is then promised, ie all elements except carbon are driven off by heat. The carbon content at 1000°C is around 94% by weight and depends on the preceding thermal treatment. In the process step performed above IS00°C and termed flake graphite graphitization, the graphitized carbon layers are given their proper alignment.

Filament-wound components are produced by a similar process, in which the roving is impregnated with resin and wound around a mandrel, instead of being woven into a expandable graphite fabric. By varying the fiber angle, the mechanical and electrical properties of the component can be influenced as desired.

The filament-wound components are then hardened in hardening chambers. The subsequent carbonization, impregnation and graphitization steps are analogous to those used in plate production.