Abstract
A cup-shaped compact with a wall thickness of 3 mm and wall height of 20 mm was formed from iron powder admixed with zinc stearate and micro wax powder or solid paraffin wax. The green compact obtained, compared with that formed by adding only zinc stearate, showed little internal density difference, and consequently had high density. The micro wax and powder-coated paraffin wax are believed to reduce the friction between the powder and raise the densty of the cup wall when added. This indicates that the powder flows from the bottom of the cup to the cup wall in the compaction process. The radial crushing strength of the cup wall admixing with 0.5 mass% zinc stearate and 1 mass% paraffin wax amounted to 28 MPa.
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