Sintering of bimodal micrometre/nanometre iron powder compacts - A master sintering curve approach

Though press and sinter powder metallurgy (PM) steel offers cost-effective solutions for structural applications, there is a constant drive improvement in their density. Addition of nanopowder to the conventional micrometre-sized metal explored improve In this study, effect addition varying amounts has been studied. Carbonyl iron (<5 ?m) water atomized (<45 were used as base which (<100 nm) was added. Dilatometric sintering studies under pure hydrogen atmosphere carried out analyze densification behavior. The results revealed that bimodal mixture containing 25% exhibited highest green density both carbonyl ASC 300 compacts. Master curve compacts developed based on dilatometer data. apparent activation energy decreased with an increase content. This reflected values work sintering. • Nanopowder/micropowder made using method. 25 wt% compact had micropowder variants. Degree increased increasing Two-peak behavior attributed nanopowder. curves