Menu (ESC)

Chemical Vapor Deposited (CVD) Silicon Carbide

CVD silicon carbide is a grade of silicon carbide. The graph bars on the material properties cards below compare CVD silicon carbide to other non-oxide engineering ceramics (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Compressive (Crushing) Strength

3900 MPa 570 x 103 psi

Elastic (Young's, Tensile) Modulus

430 GPa 63 x 106 psi

Flexural Strength

470 MPa 68 x 103 psi

Fracture Toughness

3.4 MPa-m1/2 3.1 x 103 psi-in1/2

Knoop Hardness


Poisson's Ratio


Tensile Strength: Ultimate (UTS)

220 MPa 32 x 103 psi

Thermal Properties

Maximum Temperature: Mechanical

1580 °C 2880 °F

Maximum Thermal Shock

660 °C 1220 °F

Specific Heat Capacity

670 J/kg-K 0.16 BTU/lb-°F

Thermal Conductivity

170 W/m-K 97 BTU/h-ft-°F

Thermal Expansion

4.0 µm/m-K

Other Material Properties


3.2 g/cm3 200 lb/ft3

Electrical Resistivity Order of Magnitude

2.0 10x Ω-m

Common Calculations

Stiffness to Weight: Axial

75 points

Stiffness to Weight: Bending

79 points

Strength to Weight: Axial

19 points

Strength to Weight: Bending

25 points

Thermal Diffusivity

79 mm2/s

Thermal Shock Resistance

9.2 points

Followup Questions

Further Reading

Properties of Silicon Carbide, Gary L. Harris (editor), 1995

Silicon Carbine Ceramics: Fundamental and Solid Reaction, Shigeyuki Somiya and Yoshizo Inomata (editors), 1991

Handbook of Refractory Carbides and Nitrides: Properties, Characteristics, Processing and Applications, Hugh O. Pierson, 1996

Ceramics and Composites: Processing Methods, Narottam P. Bansal and Aldo R. Boccaccini (editors), 2012

Springer Handbook of Condensed Matter and Materials Data, W. Martienssen and H. Warlimont (editors), 2005

Sintering of Advanced Materials: Fundamentals and Processes, Zhigang Zak Fang (editor), 2010