Synthesis of the Fe-6.5% wt. Si Alloy by Mechanical Alloying

Abstract

Abstract. Fe-Si alloy with a large Si content of 6.5 wt. % is obtained in nanocrystalline state by mechanical alloying of elemental iron and silicon powders. The mechanical alloying process was carried out using a high energy ball mill in argon atmosphere. Samples were collected after 0.5, 1, 2, 4, 6 and 8 hours of ball milling. The X-ray diffraction (XRD) studies indicate that after 4 hours of milling the Fe-Si alloy is formed. The powder magnetisation decreases upon increasing the milling time up to 4 hours as a consequence of the Fe-Si alloy formation. Upon heating, the DSC studies show the Fe 3 Si compound formation in the samples milled for milling times lower than 6 hours. Also, the Curie temperature of the alloy was evidenced.

High temperature corrosion of Fe‐6 wt% Si steel in various atmospheres

“…[3] Several methods for preparation material with a high Si content have been developed, such as a special thermochemical routing, [4] hot dipping process followed by diffusion annealing, [5] chemical vapor deposition, [6] or mechanical alloying. [7,8] Recently the Fe-Si steel with 6.5 wt% Si has been developed namely for electrical engines applied in electrical vehicles. [9] Studies of the corrosion of Fe-Si alloy have been done in various atmospheres of chemical composition and pressures.…”

“…This lack of ductility has been attributed to structural decomposition into at least two phases known as B2 (Fe‐Si) and DO3 (Fe 3 Si) . Several methods for preparation material with a high Si content have been developed, such as a special thermochemical routing, hot dipping process followed by diffusion annealing, chemical vapor deposition, or mechanical alloying . Recently the Fe‐Si steel with 6.5 wt% Si has been developed namely for electrical engines applied in electrical vehicles…”