SA-Tyrannohex

Fig. 21 The cross-section and fracture surface of SA-Tyrannohex. This shows relatively large fracture energy (-2000 J/m2), higher proportional limit (about 120 MPa) and high tensile strength (200 MPa)...

Fig. 22 Bending load-displacement curve of SA-Tyrannohex using chevron notch spacemen at room temperature...

The SA-Tyrannohex has potential for use in heat exchangers due to its relatively high thermal conductivity at temperatures above 1000 °C. Figure 24 shows the thermal conductivity of the SA-Tyrannohex in the direction through the thickness and the fiber direction along with other materials including representative SiC/SiC composite (CVI). 

Fig. 24 Thermal conductivity of SA-Tyrannohex compared with other materials including metals...

A distinct member of the family of oxy carbide fibre materials is Tyrannohex , a composite developed on the basis of bonded Tyranno fibres [72, 73]. The microstructure of this composite is shown in Figure 1. The fibre content reaches values up to 90 vol%. Due to the near absence of a matrix phase, the material retains high strength up to very high temperatures (195 MPa at 1500°C) and it has a very high creep resistance. The new generation Tyrannohex material, fabricated with novel sintered high-performance SA-Tyranno fibre has shown improved thermomechanical properties up to 1600°C [74]. 

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