Titanium

Titanium

Titanium powder is a fundamental material in the production of titanium components via additive manufacturing (3D printing), powder metallurgy, and other advanced manufacturing processes. Its properties are critical to the performance and quality of the final product. Key parameters that define titanium powder’s characteristics include:

Particle Size Distribution: Measured in micrometers (μm), the size range and distribution of particles affect flowability, packing density, and the homogeneity of the final product. A narrow particle size distribution is often preferred for consistent properties.
Chemical Composition: The purity of titanium, typically expressed as the percentage of Ti, and the presence of impurities (O, N, H, C, Fe, Al, etc.) are crucial. High-purity titanium powder (≥99.5% Ti) is often required for aerospace and biomedical applications.
Spherical vs. Irregular Shape: Spherical particles offer better flowability and packing density, which can enhance the density and mechanical properties of sintered or printed parts. Irregular-shaped particles might be more suitable for certain specialized applications.
Specific Surface Area (SSA): This influences the reactivity of the powder, which is important in processes like sintering or reactive sintering with other powders.
Density: Both tap density and bulk density are measured to understand the powder’s compaction behavior and its effect on the final product’s density and strength.
Flowability: A measure of how easily the powder flows, which is influenced by particle size, shape, and surface roughness. Good flowability is essential for even distribution in additive manufacturing and consistent filling of molds.
Oxygen Content: Critical for many titanium applications, low oxygen levels are desirable to prevent embrittlement and to maintain high-temperature properties.
Hazardous Properties: Titanium powder is potentially pyrophoric, meaning it can ignite spontaneously in air. Proper handling and storage measures are crucial to prevent accidents.
Particle Morphology: The morphology of the powder particles, including surface roughness and porosity, can affect the mechanical interlocking and bonding during sintering or printing.
Contamination Control: Ensuring minimal contamination from external sources during handling and processing is vital for maintaining powder quality and preventing defects in the final product.
Melting Point: Though not a variable parameter, the high melting point of titanium (approximately 1668°C) sets the baseline for processing temperatures and sintering requirements.