LAUSR

A powder of Fe83.3Si4B8P4Cu0.7 composition with D50 of 4.2 μm was prepared by the modified water atomization system named “HPWA/YK”. The obtained powder had a mostly amorphous single phase. The powder was classified to several particle sizes and the difference of enthalpy between the as-quenched state and an after-primary-crystallization state was measured by DSC. As a result, it was found that the HPWA/YK system has better cooling capability than the conventional water atomizing method and the spinning water atomizing method. In conclusion, we consider that the HPWA/YK system contributes to mass production of nanocrystalline soft magnetic powders with high saturation magnetic flux density which require enormously rapid quenching.A powder of Fe83.3Si4B8P4Cu0.7 composition with D50 of 4.2 μm was prepared by the modified water atomization system named “HPWA/YK”. The obtained powder had a mostly amorphous single phase. The powder was classified to several particle sizes and the difference of enthalpy between the as-quenched state and an after-primary-crystallization state was measured by DSC. As a result, it was found that the HPWA/YK system has better cooling capability than the conventional water atomizing method and the spinning water atomizing method. In conclusion, we consider that the HPWA/YK system contributes to mass production of nanocrystalline soft magnetic powders with high saturation magnetic flux density which require enormously rapid quenching.