High-purity cold spray copper, O < 0.10%, > 85% IACS as-sprayed conductivity. Spherical and irregular morphologies matched to your system. Electrical, thermal, repair applications.
QUICK ANSWER
Cold spray copper powder is a high-purity, spherical-to-irregular copper powder in a tight 5-45 µm cut, engineered for supersonic cold gas dynamic spraying — a solid-state deposition process where particles bond by kinetic impact at 500-1000 m/s without melting. The result is dense, oxide-free, fully conductive copper coatings used for electrical components, thermal management, electromagnetic shielding, and additive repair of copper parts.
Cold spray is the fastest-growing segment of the spray market, and copper is its flagship material because copper's ductility makes it ideal for solid-state bonding. Unlike thermal spray, nothing melts — so the coating keeps the powder's purity, conductivity, and microstructure, which is exactly what electrical and thermal applications demand. Powder quality is the process bottleneck: oxygen content, particle size distribution, and morphology determine the critical velocity at which particles bond, and therefore deposit efficiency and coating quality.
MATERIAL DATA
Lot-level controls focus on the chemistry, particle characteristics, and process values that influence manufacturing consistency and finished-part performance.
| Element | Content | Performance Role |
|---|---|---|
| Copper (Cu) | > 99.8 wt% | High purity base — conductivity and ductility for solid-state bonding |
| Oxygen (O) | < 0.10 wt% | Critical parameter — oxide films raise critical velocity and reduce deposit efficiency |
| Iron (Fe) | < 0.05 wt% | Impurity limit preserving electrical conductivity |
| Silver (Ag) | < 0.02 wt% | Trace control for conductivity certification |
| Moisture (H2O) | < 0.02 wt% | Dry powder essential for feeder stability and coating quality |
Final limits can be aligned with the agreed purchase specification.
APPLICATIONS
Electrical and thermal management applications lead the market: cold-sprayed copper deposits form busbar coatings, contact surfaces, heat sink bases, and thermal interface layers on aluminum and steel substrates — combining copper's conductivity with the substrate's weight or cost advantages. Electronics cooling is a growth driver: cold spray builds thick copper heat-spreading layers directly onto power module substrates and cold plates without the thermal damage that brazing or welding would cause to assembled electronics.
The second pillar is repair and additive manufacturing: worn or corroded copper components — commutators, slip rings, electrical contacts, mold surfaces — are rebuilt to dimension; and entire near-net copper parts are cold-sprayed as preforms for crucibles, electrodes, and rocket combustion chamber liners where copper's thermal conductivity is mission-critical. In these applications the buyer cares about oxygen content above all else, because oxide-free bonding determines both coating conductivity and deposit-to-substrate bond strength.
THERMAL SPRAY & HARDFACING POWDERS
CUSTOM SUPPLY
We supply cold spray copper in spherical gas-atomized (best flow, high-pressure systems) and irregular electrolytic (lower cost, lower-pressure systems) morphologies, in 5-25 µm and 15-45 µm cuts, with oxygen certification per lot. Custom size distributions for specific gun and nozzle combinations, low-oxygen premium grades (< 500 ppm O) for maximum conductivity, and trial-lot programs with deposit efficiency testing support are standard. Not export-controlled.
We supply cold spray copper in spherical gas-atomized (best flow, high-pressure systems) and irregular electrolytic (lower cost, lower-pressure systems) morphologies, in 5-25 µm and 15-45 µm cuts, with oxygen certification per lot.
Custom size distributions for specific gun and nozzle combinations, low-oxygen premium grades (< 500 ppm O) for maximum conductivity, and trial-lot programs with deposit efficiency testing support are standard.
MATERIAL COMPARISON
| Comparison Point | This Product | Thermal Spray Copper |
|---|---|---|
| Deposition mechanism | Solid-state kinetic bonding — no melting | Melted particle deposition |
| Coating oxide content | Near zero — preserves conductivity | Oxidized — conductivity degraded 20-40% |
| Coating conductivity | > 85% IACS | 50-70% IACS typical |
| Substrate heating | Minimal | Significant |
| Equipment cost | High (pressure systems, He option) | Lower, mature |
| Powder cost sensitivity | High — tight size cut required | Moderate |
TECHNICAL FAQ
Need a different chemistry, particle range, or processing route? Our material team can review the requirement and supply window.
Particles bond in cold spray by severe plastic deformation that must break through surface oxides. Every increment of oxide raises the critical velocity needed for bonding — higher oxygen means lower deposit efficiency, more helium consumption, and weaker coatings. We certify oxygen per lot for this reason.
Spherical gas-atomized powder flows reliably in high-pressure feeders and reaches higher velocities — the standard for production systems. Irregular electrolytic powder is cheaper and bonds at lower velocities, suiting lower-pressure and portable systems. Tell us your equipment and we match the morphology.
Yes — the deposit machines like wrought copper. Use sharp tooling and standard copper machining practice; the fine-grained as-sprayed structure often machines better than cast copper.
Aluminum, steel, titanium, nickel alloys, ceramics, and even composites with appropriate parameters. Aluminum substrates with copper cold spray are the standard lightweight electrical combination.
No. Copper powder for cold spray ships without licensing requirements.
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