The diffusion of elements out of additive particles into the iron matrix is affected by several factors including sintering conditions, compaction density and particle morphology. This study examines how the sintering conditions of a powder metallurgy compact lead to the optimization of microstructural homogeneity. Scanning electron microscopy (SEM) along with energy dispersive x-ray spectroscopy (EDXS) were used to image and map the alloy diffusion front within samples sintered at different temperatures. There is evidence that a temperature barrier must be overcome to activate the diffusion of additive particles into the iron matrix. The results of this study will provide an improved model of sintering conditions on alloy diffusion, which will enable more efficient and lower-cost manufacturing of ferrous PM materials.
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