Dust core, method of manufacturing said dust core, and inductance element and rotary electric machine including said dust core

摘要

It is an objective of the invention to provide a dust core made of an Fe-based amorphous metal powder having excellent magnetic properties, in which the dust core has a higher-than-conventional density, excellent magnetic properties and a high mechanical strength. There is provided a dust core including a mixture powder compacted, the mixture powder including: an Fe-based amorphous metal powder having a crystallization temperature Tx (unit: K), the Fe-based amorphous metal powder being plastically deformed, the plastically deformed metal Fe-based amorphous metal powder having a filling factor in the dust core higher than 80% and not higher than 99%; and a resin binder having a melting point Tm (unit: K), in which the Tx and Tm satisfy a relationship of “Tm/Tx≧0.70”.

主权项

1. A dust core, comprising a mixture powder compacted, the mixture powder including:
an Fe-based amorphous metal powder having a crystallization temperature Tx (unit: K), the Fe-based amorphous metal powder being plastically deformed, the plastically deformed Fe-based amorphous metal powder having a filling factor in the dust core higher than 80% and not higher than 99%; and a resin binder having a melting point Tm (unit: K), wherein the Tx and Tm satisfy a relationship of “Tm/Tx≧0.70”.