UBE Tyrannohex® Heat Resistant Composite

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UBE Tyrannohex® Heat Resistant Composite (discontinued **)
Categories:	Ceramic; Ceramic Matrix Composite; Other Engineering Material; Composite Fibers
Material Notes:	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.
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Physical Properties	Original Value	Comments

Specific Gravity	2.54 g/cc

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	190 - 210 MPa @Temperature 23.0 - 1500 °C
	450 - 550 MPa @Temperature 23.0 - 1500 °C
Modulus of Elasticity	115 GPa	2D
	125 GPa	UD
Flexural Strength	300 - 400 MPa @Temperature 23.0 - 1500 °C
	700 - 900 MPa @Temperature 23.0 - 1500 °C
Shear Strength	40.0 - 60.0 MPa	2D
	60.0 - 100 MPa	UD
Charpy Impact, Notched	0.900 J/cm²	Fracture energy (Chevron-notch method), J/m^2

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.100 - 0.500 ohm-cm	Specific resistance

Thermal Properties	Original Value	Comments
Thermal Conductivity	3.90 W/m-K	2D
	4.50 W/m-K	UD
Maximum Service Temperature, Air	1500 °C

**
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CUBE252 / 2733

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