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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). 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

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 5.9 x 103 psi-in1/2

Knoop Hardness

2800

Poisson's Ratio

0.11

Tensile Strength: Ultimate (UTS)

280 MPa 40 x 103 psi

Thermal Properties

Maximum Temperature: Mechanical

1270 °C 2320 °F

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

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

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