Study on the Microstructure Evolution of Fe‐6.5wt.%Si Powders Fabricated by High Pressure Gas Atomization

Corrosion behaviour of Fe–6·5 wt-%Si atomised powders

“…With the decrease in droplet diameter, the specific surface area of the droplet increases sharply and leads to the higher cooling rates. The average grain size and the grain number of the powders both decrease with the decrease in the powder size 9. Segregation of the element Si in larger powder sizes is more severe due to lower cooling rate and larger grain size.…”

“…The average grain size and the grain number of the powders both decrease with the decrease in the powder size. 9 Segregation of the element Si in larger powder sizes is more severe due to lower cooling rate and larger grain size. Pits usually nucleate in the positions where there exist the microscopic defects, impurities and enrichment or depletion of alloy elements.…”