A study has been made of the production of a 90/10 tin bronze by powder metallurgy at a density of 7·4 g/cm3, to meet specific mechanical property requirements. Types of powder mixes used were: (a) a mixture of elemental powders; (b) a partially pre-alloyed copper-tin powder; (c) an atomized bronze powder; (d) a mixture of atomized alloy and elemental powders.
A review is given of the flow, filling, pressing, and sintering characteristics of each powder mix and the processing steps necessary to produce a finished article. The factors governing the choice of a type of powder for fabricating a part are discussed.
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