| Description: Tyrannohex is a fiber assembled ceramic with both toughness like a shell or wood and excellent heat-resistance in air. Very high volume fraction (Vf) of the thin (~ 10m), continuous fiber. Vf= > 90 vol%. Tyrannohex is produced by the use of only Tyranno fiber without other matrix materials using a high-pressure machine. Very high fracture energy. Tyrannohex shows a very high fracture energy (~ 9000J/m^2) which is about 100 times as large as Si3N4 sintered body. Excellent oxidation resistance up to 1500°C in air. Almost initial strength could be maintained up to 1500°C in air. And, the initial strength was also maintained after heat-treatment at 1500°C for 1000 hours in air. (Effective formation of a protective oxide layer on the surface during early heat-treatment.) Very good creep-resistance in air compared with usual SiC/SiC composites. - Difficulty of a crack formation
- Self-healing eject around the interphase
- Densified structure
Information provided by UBE. |
