CHARACTERISTICS OF Al-Fe SINTERS MADE BY THE POWDER METALLURGY ROUTE

Magdalena Majchrowska, Konrad Lasek, Maja Nowak, Paweł Pałka, Bartosz Sułkowski

Abstract


The Al/Fe material was prepared by the powder metallurgy route with an additional intermediate stage which was a centrifuge of powder mixture. The application of the centrifuge stage was applied to obtain circular phase distribution of Al-rich phases in a sintered material. Iron powder with a particle size under 100 μm and aluminum powder with a particle size of about 25 μm, were used as starting materials. To determine the effect of centrifuging time on the distribution of Fe-Al particles, scanning electron microscopy (SEM, EDS) and XRD techniques were used. Microstructure observations show the influence of the centrifuging time on the distribution of Fe particles. It was observed that a longer centrifuging time caused changes in the ratio concentration of elements and allowed the growth of the intermetallic phase at the interface between solid Al and Fe particles.

Keywords


Al/Fe sinters; powder metallurgy; interface; intermetallic compounds; microstructure

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References


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https://www.hoganas.com/en/business-areas/sintered-components/products/pure-iron-powders/ [25.10.2018]




DOI: https://doi.org/10.7494/mafe.2018.44.4.195

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