Full-density, net-shape powder consolidation using dynamic magnetic pulse pressures

The full-density consolidation of powders into net-shape parts yields high green strength, low shrinkage, short sinter times, superior mechanical prop erties, and low manufacturing costs. The conventional low-cost, single-pres s, single-sinter process typically densifies powders at less than 65 percen t green density. This article describes the Magnepress(TM) process, a powde r-processing technique wherein pulsed magnetic-pressures consolidate powder s into full-density parts without admixed lubricants or binders. The Magnep ress technique is especially suitable for producing net-shape products with radial symmetry (e.g., rods, cylindrical parts with internal features, tub ular shapes, and high aspect-ratio specimens).