COMPACTION AND PROPERTIES OF HIGHLY POROUS POWDER PARTS PRODUCED WITH VARIOUS PORE FORMERS
Mots-clés :
highly porous sintered materials, pore-former, densification, green strength, transverse rupture strengthRésumé
The powder metallurgy route for manufacturing highly porous iron based materials was considered. To increase the porosity, the powders of ammonium, bicarbonate sodium chloride and sodium bicarbonate were mixed with an iron powder. The mixtures of the basic iron powder and pore-forming materials were compacted and sintered. The pore-formers were removed during or after the sintering process, leaving additional pores. The influence of the mixture composition on the compaction, the sintering, the green strength and the transverse rupture strength of the sintered parts were studied. The crucial role of the pore-former removal route was emphasized.
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