Question

What is the temperature range in which Carbon/Carbon is made in the Chemical Vapor Infiltration process?

Answer 1

Temparature range is around 1050 ^o C

The field of application of Chemical Vapor Infiltration (CVI) is more particularly that of manufacturing parts of composite material having fiber reinforcement and a carbon matrix. The fibers are carbon or graphite fibers or fibers of a refractory material, e.g. a ceramic, optionally coated in carbon or graphite.

Chemical vapor infiltration is used to form a deposit of pyrolytic carbon on the fibers of the substrate, throughout the volume thereof, so as to bond the fibers together and fill in the pores initially in the substrate.

To perform chemical vapor infiltration, the fiber substrate is placed in an enclosure. A gas constituting a precursor of carbon is admitted into the enclosure. Under determined conditions of temperature and pressure, the gas diffuses into the substrate and forms the deposit of pyrolytic carbon on the fibers.