Accession Number : AD0712817

Title :   STRENGTH CHARACTERIZATION OF POWDER AGGREGATES.

Descriptive Note : Technical rept.,

Corporate Author : BATTELLE MEMORIAL INST COLUMBUS OHIO COLUMBUS LABS

Personal Author(s) : Niesz,D. E. ; Bennett,R. B. ; Snyder,M. J.

Report Date : OCT 1970

Pagination or Media Count : 19

Abstract : 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)

Descriptors :   (*POWDERS, *COMPACTING), (*ALUMINA, COMPRESSIVE PROPERTIES), HOT PRESSING, POROUS MATERIALS, MICROSTRUCTURE, POWDER METALS, ALUMINUM, COPPER, GRAPHITE

Subject Categories : Ceramics, Refractories and Glass
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE