Powder characterization includes flow rate measurements, particle size distribution by laser diffraction and sieve analysis, apparent density, tapped density and chemical composition”
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Powder characterization includes flow rate measurements, particle size distribution by laser diffraction and sieve analysis, apparent density, tapped density and chemical composition. Powder characterization identifies properties to help promote a successful powder-process combination in both raw and final products.
Whatever your metal powder analysis needs, the WMT&R Analytical Chemistry team has a solution. Backed by robust methods, quality systems and industry accreditations, we look forward to supporting your goals with quality and speed.
Powder sieve analysis separates a powdered metal sample based on particle size. ASTM B214 provides dry sieve analysis of metal powders, from 45-850µm. ASTM B214 is a method of performing particle size distribution that implements a standard procedure to ensure accurate and replicable results. Particle size distribution - also called gradation - is commonly determined for the powered metals and additive manufacturing industries. The gradation of a powder used in manufacturing will affect the mechanical properties of the final product. The gradation is also an easy way to gauge the quality and consistency of powder.
The test is conducted using a mechanized sieve shaker and mesh sieves with known opening sizes. After testing is complete, the mass of powder left in each sieve is weighed. The results are presented as a mass percent due to the fact that the samples taken for particle size distribution are representative.
These test methods are for determining the flow rate of free-flowing metal powders and non-free flowing metal powders that will flow unaided through either the Hall Flowmeter Funnel per ASTM B213 or the Carney Funnel per ASTM B964. The Carney Funnel is designed for those non-free flowing powders that do not flow freely through the Hall Flowmeter Funnel. A weighed mass of metal powder is timed as it flows through the orifice of either the Hall Flowmeter funnel or the Carney funnel. The ability of a powder to flow is a major function of the interparticle friction of the powder which influence production rates and uniformity of compacted parts made from these powders. The flow rate of the powder is analyzed and reported as either (FRH) or (FRC).
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