Nickel-Graphite Powder [-170+325]

Understanding Nickel-Graphite Thermal Spray Powder

Nickel-graphite is a composite powder where fine graphite particles are encapsulated or blended with a nickel matrix. During thermal spraying, the nickel melts and forms the coating binder while the graphite remains partially intact, providing a low-friction, self-lubricating phase. This makes the coating ideal for abradable seals in gas turbines, turbochargers, and compressors where a rotating component must rub against a stationary housing without causing damage.

The -170+325 mesh cut (approximately 45 to 90 microns) is a common specification for thermal spray. It balances flowability for consistent powder feeding with a particle size fine enough to produce smooth, dense coatings. Tighter or alternative cuts may be available on enquiry.

Typical Thermal Spray Processes

This powder is generally suitable for the following spray processes. Final suitability depends on your specific gun model, parameters, and coating requirements:

• HVOF (High Velocity Oxygen Fuel): Produces dense, well-bonded coatings with low oxide content. Often preferred for high-performance abradable seals.
• Plasma Spray: Offers flexibility in coating thickness and composition. Suitable for larger components and field applications.
• Flame Spray: A cost-effective option for less demanding abradable or clearance-control coatings where extreme bond strength is not critical.

Industrial Applications

Nickel-graphite coatings are primarily used where controlled wear and low friction are required at the interface between rotating and stationary parts. Common application areas include:

• Abradable Seals: Gas turbine shrouds, compressor casings, and turbocharger housings where the coating sacrifices itself to maintain tight clearances.
• Clearance Control: Labyrinth seals and blade tip clearance management in rotating machinery.
• Anti-Fretting: Surfaces subject to low-amplitude oscillating motion where galling or fretting is a concern.

Selection and Handling Tips

When specifying nickel-graphite powder, consider the following:

• Mesh Verification: Confirm that -170+325 meets your gun manufacturer's recommended particle size range. Some systems perform better with narrower cuts.
• Process Compatibility: Not all nickel-graphite grades are optimized for every spray process. Share your gun model and parameters for a compatibility check.
• Storage: Store powder in sealed containers in a dry environment. Graphite can absorb moisture, which may affect flow and coating quality.
• Pre-Spray Drying: If moisture uptake is suspected, a low-temperature drying step before spraying may improve feeding consistency.

About SPA2Z — Your Source for Nickel-Graphite Powder

SPA2Z supports industrial buyers and maintenance teams in sourcing thermal spray powders that match their equipment and application requirements. We understand that coating performance depends on consistent powder quality, correct particle sizing, and process compatibility.

When you enquire about Nickel-Graphite Powder [-170+325] from SPA2Z, you can expect practical, no-nonsense support. We help you verify mesh suitability for your spray gun, confirm available pack sizes, and provide the information you need to make a procurement decision. Whether you are coating turbine components, rebuilding compressor seals, or maintaining rotating equipment, we are here to supply the powder and the technical clarity you need.

Contact us today to request a powder grade quote or discuss your thermal spray application.