Fiber interface coatings are critical to any fiber-reinforced ceramic matrix composite system. Ultramet has unique capabilities to deposit proven interface coatings of oxides, nitrides, and carbides by ultraviolet-activated chemical vapor deposition either in single or multiple layers.
In a powerful variant of chemical vapor deposition, ultraviolet light rather than a conventional heat source promotes the chemical reaction in ultraviolet-activated chemical vapor deposition (UVCVD). In addition to fiber interface coatings, UVCVD is used to fabricate environmental and thermal barrier coatings.
UVCVD is identical to CVD except that precursor gas reactants are activated to a more reactive state by exposure to ultraviolet light rather than a conventional heat source.
Oxide and nitride interface coatings for carbon/silicon carbide/alumina fibers, fabrics, and woven preforms
| Oxide interface coatings for carbon/silicon carbide/alumina fibers, fabrics, and woven preforms | |
|---|---|
| Oxide coatings | Nonoxide coatings |
| Zirconia (ZrO2) Yttria-stablized zirconia (YSZ) Titania (TiO2) Alumina (AI2O3) Hafnia (HfO2) Yttria (Y203) Silica (SiO2) Tantala(Ta2O5) | Pure metals: rhenium, tungsten Carbon Carbides: Silicon Carbide (SiC) Nitrides Zirconium Nitride (ZrN) Hafnium Nitride (HfN) Boron Nitride (BN) Silicon-doped BN (Si-BN) |