Meaning
High velocity liquid metal processing converts molten titanium into spherical powder through the application of inert gas jets. Titanium atomization functions by breaking a continuous stream of material into fine droplets that solidify during their flight through a controlled cooling chamber. The resulting morphology dictates the flowability and packing density required for additive manufacturing and metal injection molding.
This production method maintains the chemical purity of reactive metals by preventing atmospheric contamination within a vacuum or argon environment.
Particle Morphology
Spherical geometry arises when molten titanium droplets undergo surface tension effects during rapid solidification. These high-density particles exhibit lower porosity than powders derived from mechanical grinding or chemical reduction. Manufacturers select specific gas pressures to influence the diameter distribution and the presence of satellite particles on the surface.
Particle size ranges determine the suitability of the powder for laser powder bed fusion or binder jetting operations.
Thermal Mechanics
Cooling rates control the microstructure of each individual powder grain formed during flight. The latent heat release occurs as the liquid droplets lose energy to the surrounding gas stream. Smaller grains experience faster heat extraction and develop a finer crystalline structure than their larger counterparts.
Precise regulation of the gas flow velocity ensures consistent thermal profiles and prevents unintended oxidation during the transition from liquid to solid phase.
Gas Requirements
Inert gas purity determines the total oxygen and nitrogen content of the final metal powder product. Argon serves as the preferred medium because the atomic weight of this noble gas provides superior momentum transfer for effective droplet fragmentation. Contamination limits within the chamber define the shelf life and mechanical integrity of components printed from the material.
Elevated gas purity reduces interstitial element levels, which yields superior ductility in final titanium parts.
