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SUPERSiC Material Properties

Property Basic SUPERSiC SUPERSiC-Si SUPERSiC-SiC
Apparent Density, ra (g/cm3) 3.13 3.01 3.07
Bulk Density, rb (g/cm3) 2.53 2.93 3.05
Total Porosity, Pt (%) 20 4 4
Open Porosity, Pop (%) 19 0.5 0.5
Total Impurity Level (ppm) <10 <10 <10
Flexural Strength (MPa/ksi) 147/21.3 214/31.1 269/39.0
Tensile Strength (MPa/ksi) Tension 129/18.7 (m=16) N/A N/A
Diametral Compression 110/16.0 121/17.6 138/20.0
Elastic Modulus, E (GPa/msi) 214/31 338/49 379/55
Specific Stiffness, E/rb (kN-m/g) 85 121 123
Poisson’s Ratio, n 0.17 0.17 0.15
Dynamic Shear Modulus, G (GPa/msi) 96/14 138/20 164/24
Fracture Toughness, KIC (MPa×m0.5) 2.3 2.63 2.84
Hardness (kg/mm2) 1992 1643 1900
Thermal Diffusivity, D (10-6 m2/s) 92 115 109
Thermal Conductivity at RT, k (W/m×K) 151 220 218
Instantaneous CTE, aT (10-6/K) 2.4 2.4 2.4