Abstract
A method of measuring the interparticle friction of metal powders under conditions of applied vibrational energy has been devised. With zero vibrational energy, the friction, expressed as an angle or as a coefficient, can be correlated with the basic characteristics of a powder, provided that the conditions of settling are standardized to provide consistent density values. The effect of the variation of settled density is shown.
By the application of rectilinear sinusoidal vibrational energy to the powders, it can be shown how the variation and combinations of frequency and displacement effectively reduce interparticle friction, thus enhancing flow and settling of metal powders into dies offering difficult contours and restrictive sections.
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