Hexoloy® SA SiC is a pressureless, sintered form of alpha silicon carbide, with a density greater than 98 percent theoretical. It has a very fine grain structure (4 - 10 microns) for excellent wear resistance and contains no free silicon, which makes it highly chemically resistant in both oxidizing and reducing environments,
Photomicrograph of Hexoloy® SA Silicon Carbide's typical appearance of pores when magnified.
Property | Units | Typical Values |
---|---|---|
Composition* | - | SiC |
Grain Size | µm | 4 - 10 |
Density | g / cm3 | 3.10 |
Hardness (Knoop)** | kg / mm2 | 2800 |
Flexural Strength 4pt @ RT*** | MPa x103 lb / in2 |
380 55 |
Flexural Strength 3 pt @ RT*** | MPa x103 lb / in2 |
550 80 |
Compressive Strength @ RT | MPa x103 lb / in2 |
3900 560 |
Modulus of Elasticity @ RT | GPa x106 lb / in2 |
410 59 |
Weibull Modulus (2 parameter) | 8 | |
Poisson Ratio | 0.14 | |
Fracture Toughness @ RT Double Torsion & SENB |
MPa x m1/2 x103 lb / in2 x in1/2 |
4.60 4.20 |
Coefficient of Thermal Expansion RT to 700°C |
x10-6 mm / mmK x10-6 in / in °F |
4.02 2.20 |
Maximum Service Temp. Air |
°C °F |
1900 3450 |
Mean Specific Heat @ RT | J / gmK | 0.67 |
Thermal Conductivity @ RT @ 200° C @ 400° C |
W / mK Btu / ft h °F W / m°K Btu / ft h °F w / m°K Btu / ft h°F |
125.6 72.6 102.6 59.3 77.5 44.8 |
Permeability @ RT to 1000°C | Impervious to gases over 31 MPa | |
Electrical Resistivity @ RT**** @ 1000°C |
ohm-cm ohm-cm |
102 - 1011 0.01 - 0.2 |
Emissivity | 0.9 | |
* Composition code: Si = free silicon metal; C = free graphite; SiC = silicon carbide
** Knoop 0.1 kg load *** Test bar size: 3 x 4 x 45 mm (0.118" x 0.157" x 1.772") **** Dependent upon dopants in Hexoloy Sa SiC which will decrease electrical resistivity |