Abstract
We report a new (Fe-P)-Si based alloy with relatively high induction (1.8-1.9 T), low coercivity (< 80 A/m), high resistivity (∼38 μΩ cm) and low core loss (217 W/kg @ 1 T/1 kHz) comparable to the commercially available M530-50 A5 Si-steel. The attractive magnetic and electrical properties are attributed to i) the two phase microstructure of fine nano precipitates of Fe3P dispersed in α-Fe matrix achieved by a two-step heat-treatment process and ii) Si addition enhancing the resistivity of the α-Fe matrix phase. As the alloy processing is by conventional wrought metallurgy method, it has the potential for large scale production.
Highlights
The attractive magnetic and electrical properties are attributed to i) the two phase microstructure of fine nano precipitates of Fe3P dispersed in α-Fe matrix achieved by a two-step heat-treatment process and ii) Si addition enhancing the resistivity of the α-Fe matrix phase
Soft magnetic materials are extensively used in various electro-technical applications like motors, alternators, transformers, actuators, choke coils, and they are essential in many areas like automotive, defence, telecommunications etc
Si-steel and low carbon steel are widely used in the manufacture of alternators and motors; the former for better performance and the latter for cost effectiveness
Summary
Soft magnetic materials are extensively used in various electro-technical applications like motors, alternators, transformers, actuators, choke coils, and they are essential in many areas like automotive, defence, telecommunications etc. We report a new (Fe-P)-Si based alloy with relatively high induction (1.8-1.9 T), low coercivity (< 80 A/m), high resistivity (∼38 μΩ cm) and low core loss (217 W/kg @ 1 T/1 kHz) comparable to the commercially available M530-50 A5 Si-steel.
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