0081

* ADDED DURING LATTER PART OF STUDY

variations between spray dried particles in addition to the microscopic inhomo-geneity inherent in spray dried powders. The spherical nature of the powders caused them to flow smoothly, but the low particle density lowered the material's mass flow rate. Sintered materials were chemically homogeneous at 200X and tended to have a rough, rounded spherical shape. These powders tend to be relatively porous, although their true densities are higher than those of spray dried powders. These powders flowed fairly well, but the powder porosity lowered the mass flow rates. Fused materials are dense, angular powders with low surface areas. When the

NORMALIZED POPULATION 50' 40'

NORMALIZED POPULATION 50' 40'

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