The quality of metal parts produced by powder-bed additive manufacture is intrinsically bound to the quality of the feedstock material – metal powders. Particle size distribution is a key metric that is used to certify and monitor the quality of metal powders both prior to first use and during powder recycling. Two techniques are typically deployed for this – laser diffraction for the smaller particle size fractions and sieve analysis for the larger particles.
While sieve analysis remains a popular and established sizing technique for larger particles, the addition of a dynamic imaging accessory to your laser diffraction system can allow you to measure the complete size distribution in a single test.
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