# 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 10 ^{3} psi*

Elastic (Young's, Tensile) Modulus

370 *GPa* 54 *x 10 ^{6} psi*

Flexural Strength

410 *MPa* 60 *x 10 ^{3} psi*

Fracture Toughness

4.0 *MPa-m ^{1/2}* 3.6

*x 10*

^{3}psi-in^{1/2}Knoop Hardness

2500

Poisson's Ratio

0.19

Tensile Strength: Ultimate (UTS)

310 *MPa* 45 *x 10 ^{3} 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

Density

3.0 *g/cm ^{3}* 190

*lb/ft*

^{3}Electrical Resistivity Order of Magnitude

0.94 *10 ^{x} 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 *mm ^{2}/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