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Titanium Diboride (TiB2)

Titanium diboride is a non-oxide engineering ceramic. It has a very high density among non-oxide engineering ceramics. In addition, it has a moderately high fracture toughness and a moderately high heat capacity. The graph bars on the material properties cards below compare titanium diboride to other non-oxide engineering ceramics (top) and the entire database (bottom).

Mechanical Properties

Compressive (Crushing) Strength

3540 MPa 510 x 103 psi

Elastic (Young's, Tensile) Modulus

290 GPa 41 x 106 psi

Flexural Strength

380 MPa 55 x 103 psi

Fracture Toughness

6.5 MPa-m1/2 5920 psi-in1/2

Knoop Hardness

2800

Poisson's Ratio

0.11

Tensile Strength: Ultimate (UTS)

280 MPa 40 x 103 psi

Thermal Properties

Maximum Thermal Shock

110 °C 230 °F

Specific Heat Capacity

870 J/kg-K 0.21 BTU/lb-°F

Thermal Conductivity

58 W/m-K 33 BTU/h-ft-°F

Thermal Expansion

8.0 µm/m-K

Other Material Properties

Density

4.5 g/cm3 280 lb/ft3

Electrical Resistivity Order of Magnitude

-6.5 10x Ω-m

Common Calculations

Stiffness to Weight: Axial

35 points

Stiffness to Weight: Bending

49 points

Strength to Weight: Axial

17 points

Strength to Weight: Bending

21 points

Thermal Diffusivity

15 m2/s

Thermal Shock Resistance

8.7 points

Followup Questions

Further Reading

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015