Grand Prize Gas-Atomized Chemical Reservoir Ods Ferritic Stainless Steels

TitleGrand Prize Gas-Atomized Chemical Reservoir Ods Ferritic Stainless Steels
Publication TypeJournal Article
Year of Publication2010
AuthorsRieken JR, Anderson IE, Kramer MJ
Journal TitleInternational Journal of Powder Metallurgy
Date Published11
ISBN Number0888-7462
Accession NumberISI:000285430100004

Gas-atomization reaction synthesis was used to surface oxidize ferritic stainless steel powders resulting in an ultrathin (<100 nm) metastable chromium-enriched oxide shell. Subsequently, the shell was dissociated and served as an oxygen reservoir for the formation of uniformly dispersed nanoscale Y-(Ti, Hf) oxide precipitates during heat treatment of the as-consolidated powders.Powders in the as-atomized and heat-treated conditions were characterized and compared using several electron microscopy techniques. Scanning (SEM), auger (AES), and transmission (TEM) electron microscopy were used in conjunction with energy dispersive spectroscopy (EDS) and X-ray powder diffraction (XRD) to effectively characterize the oxide layers and the size, shape, location, and chemical composition of the precipitates formed during heat treatment. The goal of these analyses was to determine the composition of the oxide shell and to confirm the exchange of oxygen from the shell to a distribution of finely spaced and highly stable nanoscale oxide particles. Selected examples of the use of these techniques are shown.

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Alternate JournalInt J Powder Metall