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SUPERSiC Material Properties

Property SUPERSiC SUPERSiC-3C SUPERSiC-3CX SUPERSiC-Si  SUPERSiC-Si-3C  SUPERSiC-Si-8C  SUPERSiC-SP
Apparent Density, g/cm3  (lb/in3)
3.13
(0.113)
3.15
(0.114)
3.15
(0.114)
 3.01
(0.109)
 3.03
(0.110)
 3.03
(0.110)
 3.04
(0.110)
Bulk Density,
g/cm3   (lb/in3)
2.53
(0.092)
2.55
(0.092)
2.55
(0.092)
 2.93 
(0.106)
 2.95 
(0.107)
 2.95 
(0.107)
 3.00 
(0.109)
Total Porosity, Pt  20%
201%
201%
 4%
 41%
 41%
 5%
Open Porosity, Pop
19%
02%
02%
 1%
 02%
02%
 1%
Total Impurity Level  <10 ppm
<10 ppm
<10 ppm
 <10 ppm
 <10 ppm
 <10 ppm
 <10 ppm
Flexural Strength,
MPa (psi)
155 (22,400) 155 (22,400)
155 (22,400)
 192 (27,900)
 192 (27,900)
 192 (27,900)
 220 (31,900)
Tensile Strength MPa (psi) Tension 129 (18,700) 129 (18,700)
129 (18,700)
124 (17,940)  124 (17,940) 
124 (17,940)   162 (23,510)  
Elastic Modulus,  
GPa (106 psi)
217 (31) 217 (31)
217 (31)
 331 (48)  331 (48)
 331 (48)
 373 (54)
Specific Stiffness, E/rb kN.m/g 85 85 85  115 115   115  124
Poisson’s Ratio,  0.17 0.17 0.17  0.17
 0.17
 0.17
 0.17
Dynamic Shear Modulus, GPa (10psi) 97 (14) 97 (14)
97 (14)
 138 (20)  138 (20)
 138 (20)
 159 (23)
Fracture Toughness, MPa.m0.5 2.4 2.4
2.4
 3.8
 3.8
 3.8
 N/A
Hardness, kg/mm2 1992 N/A N/A
 1643
 N/A
 N/A
 N/A
Thermal Diffusivity,  mm2/s 100 100 100 115 115 115 111
Thermal Conductivity W/m-K (Btu-ft/hr/ft2°F) 170 (98) 170 (98)
170 (98)
 220 (127)  220 (127)
 220 (127)
 224 (129)
Instantaneous CTE,
10-6/K (10-6/°F)
2.4 (1.3) 2.4 (1.3)
2.4 (1.3)
 2.4 (1.3)
 2.4 (1.3)
 2.4 (1.3)
 2.4 (1.3)

Porosity is sealed under the dense coating, porosity is not exposed to the process


Porosity sealed off by CVD SiC coating