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Sprayable Superfine
Tungsten Carbide Cobalt –
Infralloy™ Powder S7400 Series

[U.S. Patent Nos. 6,025,034 6,277,448 6,277,774 6,287,714]
Thermal Spray Grade Tungsten carbide cobalt is a ceramic-metal (cermet) composite material used as a wear resistant coating. The alloyed form gives superior hardness. Infralloy™ powder is made from WC nanoparticles alloyed with a cobalt binding matrix phase. Infralloy™ Series S7400 powder is available as agglomerated particles with dimension 5 < F < 45 mm with high flowability for HVOF thermal spray applications.


SEM micrograph typical of Infralloy™ S7412 feedstock powder showing spherical geometry with high flowability.

Properties of Infralloy™ S7400 Series Powders S7412 S7417
WC : Co wt ratio 88 : 12 83 : 17
Alloy content < 1 % < 1 %
powder grain size (ave.) 50 - 500 nm 50 - 500 nm
agglomerated powder size 5 < Φ < 45 μm 5 < Φ < 45 μm
coating hardness (typical) 1100 VHN 900 VHN
1 nanometer (nm) = 10 – 9 meter (m)
Coating Microstructure
Cross sectional SEM view of a typical very dense carbide coating produced by a Metco HVOF gun using Infralloy™ S7412 feedstock powder. Pores (dark spots) occupy only ~ 1% volume.

Suggested Applications

Inframat Infralloy™ S7400 Series powder is a superior coating material providing wear-, erosion-, and corrosion-resistant surfaces where excellent to exceptional fracture toughness is required.
S7400 Series Coating Types Fracture Toughness
S7412 Wear-, Erosion-, Corrosion-Resistant Excellent
S7417 Wear-, Erosion-, Corrosion-Resistant Exceptional

The Thermal Spray Grade material can be applied with DC Arc plasma and HVOF guns. Full spray specifications are available through Technical Applications Bulletins Nos. S7412.01B and S7417.01B.



Inframat® Advanced Materials,
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