Latest NTST News:
New Hi-Tech Coatings:
Boron Carbide (B4C)
Silicon Carbide (SiC)
Aluminum Nitride (AlN)
Cubic Boron Nitride (c-BN)
Hex Boron Nitride (h-BN)
Silicon Nitride (Si3N4)
Titanium Nitride (TiN)
Download the "New Coatings Brochure" for a short description of the above coatings or download other specific products at the bottom of this home page
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Nevada Thermal Spray Tech.
4842 Judson Avenue, Suite 115
Las Vegas, NV 89115
Thermal spray coatings are
used in over 50 industries
Combustion Processes (Flame, HVOF)
Combustion processes combine air, oxygen, and a fuel gas to generate a high temperature, high velocity plume that is optimum for producing metallic coatings. With the relatively low flame temperature of the processes, the feedstock is melted by convective heat transfer with no superheating or vaporization of the droplets. When the droplets strike the substrate, their temperature peaks as the high kinetic energy of the droplet is transformed into thermal energy and the droplets causing thickness buildup.
The Flame process (e.g. Figures 1&2) utilizes subsonic gas velocities to fabricate coatings. In recent years the major trend in the thermal spray industry has been to increase the working gas/droplet velocity to obtain better coating attributes such as hardness, density, wear resistance, and surface finish. Thus, the high-velocity oxygen fuel (HVOF) process is a recent thermal spray process that employs innovative gun nozzle configurations to generate supersonic gas flows that produce denser, harder, smoother, and stronger coatings (e.g. Figure 3).
Figure 1. Fabrication of an Al coating using the Flame process
Figure 2. Fabrication of an Ni coating using the Flame process
Figure 3. HVOF spraying of an industrial component