Tungsten Carbide Cobalt Powder ( WCCo, 28um, 99.9% )

Tungsten Carbide Cobalt Powder

Tungsten carbide has a high melting point at 2,870 ° C (5,200 ° F), a boiling point of 6,000 ° C (10,830 ° F) when it is under a pressure equivalent to 1 standard atmosphere (100 kPa), a conductivity thermal power of 110 W • m – 1 • K – 1 and a thermal expansion coefficient of 5.5 μm • m – 1 • K – 1. The tungsten carbide is extremely hard, with a radius of about 9 on the scale of Mohs and with a number of Vickers of about 2600. It has a Young module of about 530-700 GPa, a volume module of 630-655 GPa and a cutting module of 274 GPa. It has a maximum tensile strength of 344 MPa, a maximum compressive strength of about 2.7 GPa and a Poisson ratio of 0.31

The velocity of a longitudinal wave (the speed of sound) through a thin tungsten carbide bar is 6220 m / s.

The low electrical resistivity of tungsten carbide of about 0.2 μΩ • m is comparable to that of some metals (eg Vanadium 0.2 μΩ • m).

The WC is easily moistened with molten nickel and cobalt. The phase diagram analysis of the W-C-Co system shows that WC and Co form a pseudo-binary eutectic. The phase diagram also shows that there are so-called η-carbides with composition (W, Co)

The C that can be formed and the fragility of these phases means that the control of the carbon content in the cemented carbides WC-Co is important.