STRENGTH CHARACTERIZATION OF POWDER AGGREGATES.
BATTELLE MEMORIAL INST COLUMBUS OHIO COLUMBUS LABS
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In materials made by powder processing, the strength of the aggregates in the powder is important with regard to processing parameters, microstructural development and properties. A technique for determining this important powder characteristic is proposed. The technique is based on interpretation of pressure-density data. Pressure-density data were obtained for two commercial reactive alumina powders, for aluminum, copper, and graphite powders, and for a series of alumina powders prepared by calcining a dry-milled reactive alumina powder at selected temperatures. The data yielded several linear regions when plotted as logarithm of pressure versus relative density. The mechanism believed to control compaction in each linear region is identified, and a technique for determining the strength of aggregates in powders from pressure-density data is proposed. Author
- Ceramics, Refractories and Glass
- Properties of Metals and Alloys