MAGNETIC ALLOY POWDER AND ITS PRODUCTION METHOD

MAGNETIC ALLOY POWDER AND ITS PRODUCTION METHOD

PROBLEM TO BE SOLVED: To obtain homogeneous La (Fe-Si)13ordinary temperature magnetic refrigeration alloy powder free of α-Fe without solution heat treatment. SOLUTION: Fe-Si system alloy powder and a mixture including lanthanum oxide and alkaline earth metal are held for ≥2 hours at 950 to 1,200°C...

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Bibliographische Detailangaben
1. Verfasser: TANIGAWA SHIGEO
Format: Patent
Sprache:eng
Schlagworte:
ALLOYS
BASIC ELECTRIC ELEMENTS
CASTING
CHEMISTRY
ELECTRICITY
FERROUS OR NON-FERROUS ALLOYS
INDUCTANCES
MAGNETS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
PERFORMING OPERATIONS
POWDER METALLURGY
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To obtain homogeneous La (Fe-Si)13ordinary temperature magnetic refrigeration alloy powder free of α-Fe without solution heat treatment. SOLUTION: Fe-Si system alloy powder and a mixture including lanthanum oxide and alkaline earth metal are held for ≥2 hours at 950 to 1,200°C in an inert gaseous atmosphere or in vacuum and is thereafter cooled down to ≤200°C and the reaction product resulted therefrom is washed and dried. The magnetic alloy which is ≤500 μm in maximum grain size, is paramagnetic at ordinary temperature (23°C), and is ≤5 Am2/kg in saturation magnetization is obtained. COPYRIGHT: (C)2007,JPO&INPIT