THE INVESTIGATION OF POROUS MEDIA PREPARED FROM SPHERICAL METAL POWDER PARTICLES(Ⅱ)

摘要

The processing of spherical stainless steel powder particles by compact¬ing and sintering methods is described. Room temperature air permeability and tensile strength and stress rupture data at 1100°F are reported.nPorous specimens were prepared from six particle size fractions to den-sities ranging from 75％ to 90％of the density of the solid material and the thicknesses ranging from 0.040 inch to 0.200 inch by various combinations of compacting and coining pressures. Sintering time, temperature, and at¬mosphere were held constant. Methods of separating spherical particles from an aggregate of particle shapes are discussed.nThe permeability data are presented in the form of a D'Arcy coefficient of permeability and also as a relationship between the pressure differential across the compact and the volumetric rate of ail flow through the compact.