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Reaction Bonded Silicon Carbide

Reaction bonded silicon carbide is a grade of silicon carbide. The graph bars on the material properties cards below compare reaction bonded 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

2780 MPa 400 x 103 psi

Elastic (Young's, Tensile) Modulus

370 GPa 54 x 106 psi

Flexural Strength

410 MPa 60 x 103 psi

Fracture Toughness

4.0 MPa-m1/2 3.6 x 103 psi-in1/2

Knoop Hardness


Poisson's Ratio


Tensile Strength: Ultimate (UTS)

310 MPa 45 x 103 psi

Thermal Properties

Maximum Temperature: Mechanical

1160 °C 2120 °F

Maximum Thermal Shock

400 °C 750 °F

Specific Heat Capacity

1180 J/kg-K 0.28 BTU/lb-°F

Thermal Conductivity

140 W/m-K 78 BTU/h-ft-°F

Thermal Expansion

4.3 µm/m-K

Vicat Softening Temperature

400 °C 750 °F

Other Material Properties


3.0 g/cm3 190 lb/ft3

Electrical Resistivity Order of Magnitude

0.94 10x Ω-m

Common Calculations

Stiffness to Weight: Axial

69 points

Stiffness to Weight: Bending

80 points

Strength to Weight: Axial

28 points

Strength to Weight: Bending

34 points

Thermal Diffusivity

38 mm2/s

Thermal Shock Resistance

14 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