Gas Atomized Nickel Powder
Overview
Gas atomized nickel powder is produced by melting nickel and disintegrating the molten stream with high-pressure inert gas (typically argon or nitrogen), forming spherical particles with controlled size distribution. This manufacturing method yields powders with superior flow characteristics compared to electrolytic or carbonyl nickel powders. The spherical morphology and high purity make it particularly suitable for additive manufacturing processes like selective laser melting (SLM) and binder jetting. The gas atomization process allows precise control over particle size distribution, typically ranging from 5 to 150 microns depending on application requirements.
Physical and Chemical Properties
Gas atomized nickel powder exhibits typical metallic properties including high electrical and thermal conductivity. The spherical particles demonstrate excellent packing density (up to 65% theoretical density in loose form) and flow rates below 25s/50g (Hall flowmeter). Key quality parameters include particle size distribution (commonly D50 of 15-45μm for AM applications), apparent density (4.0-4.8 g/cm³), and tap density (4.5-5.2 g/cm³). Surface area typically ranges between 0.1-0.5 m²/g depending on particle size. The powder maintains good oxidation resistance due to naturally forming passive oxide layer.
Main Applications
In additive manufacturing, nickel powder serves as base material for superalloy components in aerospace and energy sectors. The spherical particles ensure consistent layer deposition and minimal porosity in printed parts. Other significant applications include thermal spray coatings for corrosion protection, metal injection molding (MIM) feedstock for complex geometries, and brazing pastes for high-temperature joining. The powder is also used in catalyst production and as additive in specialty alloys where controlled nickel content is required.
Safety and Storage
As combustible metal powder, nickel requires strict handling protocols. Storage areas should maintain relative humidity below 40% and use inert gas blanketing for sensitive applications. NFPA 484 standards apply for dust explosion prevention. PPE including NIOSH-approved respirators (N95 or better), safety goggles, and anti-static clothing is mandatory during handling. Spills should be cleaned with non-sparking tools under inert atmosphere. Shelf life typically exceeds 2 years when stored in sealed containers with desiccants.
B2B Procurement Guide
Industrial buyers should specify: 1) Particle size distribution (PSD) with D10/D50/D90 values, 2) Chemical composition including trace elements, 3) Flow rate and apparent density, 4) Packaging options (typically 10-25kg sealed cans or drums). Quality certifications like ISO 9001 and material test reports (MTR) with batch traceability are essential. For AM applications, verify powder reuse characteristics through supplier-provided data on oxidation behavior after multiple processing cycles. Consider regional suppliers for reduced logistics costs given hazardous material shipping restrictions.
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