Tantalum Carbide Powders

PTaC-1

PTaC-2

PTaC-3

Ta(Nb)C

99.5

99.0

99.0

Total C

6.20

6.20

6.25

Free C

0.10

0.15

0.20

Nb

0.3

1.0

5.0

Fe

0.06

0.12

0.20

Si

0.015

0.02

0.025

Al

0.01

0.01

0.02

Ti

0.01

0.02

0.02

O

0.15

0.20

0.30

N

0.025

0.05

0.05

Na

0.015

0.02

0.02

Ca

0.015

0.02

0.02

Fsss

Special Rank

1.5(µm)

Class A

3.0(µm)

Class B

6.0(µm)

Application

An additive in cemented carbides

 
Tantalum carbide is dark-to-light brown in color with a metallic luster. Pure crystals without nitride or oxide films are gold in color. Ta2C melts incongruently and is gray with a metallic luster. Ta2C melts at 3400; m.p. TaC has been reported to be as high as 4820
 
TaC burns in air with a bright flash and is only slightly soluble in acids. Its density is 14.53 g/cm3; Mohs hardness is 9+; Brinell hardness is 840; knoop microhardness is 1952 kg/mm2. Microhardness also has been reported as 1800 kg/mm2 (50g load). Modulus of elasticity is 41.5x108psi; tensile strength at room temperature is 2000-4000psi.
 
The mean linear CTE of randomly oriented, polycrystalline TaC is 8.2x10-6/. The specific electrical resistivity of TaC at room temperature is 200µ.cm.