# Pressure Sintered (Hot Pressed) Boron Carbide

Hot pressed boron carbide is boron carbide in the hot isostatic pressed (HIP) condition. The graph bars on the material properties cards below compare hot pressed boron 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

2200 *MPa* 320 *x 10 ^{3} psi*

Elastic (Young's, Tensile) Modulus

460 *GPa* 67 *x 10 ^{6} psi*

Flexural Strength

410 *MPa* 59 *x 10 ^{3} psi*

Fracture Toughness

2.5 *MPa-m ^{1/2}* 2.3

*x 10*

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

3200

Poisson's Ratio

0.17

Tensile Strength: Ultimate (UTS)

350 *MPa* 51 *x 10 ^{3} psi*

## Thermal Properties

Maximum Temperature: Mechanical

2000 *°C* 3630 *°F*

Specific Heat Capacity

950 *J/kg-K* 0.23 *BTU/lb-°F*

Thermal Conductivity

90 *W/m-K* 52 *BTU/h-ft-°F*

Thermal Expansion

5.6 *µm/m-K*

## Other Material Properties

Density

2.5 *g/cm ^{3}* 160

*lb/ft*

^{3}Dielectric Constant (Relative Permittivity) At 1 MHz

6.4

Electrical Resistivity Order of Magnitude

0 *10 ^{x} Ω-m*

## Common Calculations

Stiffness to Weight: Axial

100 *points*

Stiffness to Weight: Bending

100 *points*

Strength to Weight: Axial

39 *points*

Strength to Weight: Bending

44 *points*

Thermal Diffusivity

38 *mm ^{2}/s*

Thermal Shock Resistance

9.7 *points*

## Followup Questions

## Further Reading

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

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