RARE-EARTH-IRON-BORON ALLOY POWDER FOR SINTERED MAGNET

RARE-EARTH-IRON-BORON ALLOY POWDER FOR SINTERED MAGNET

PURPOSE:To improve sintering property of a pressed powder material and coercive force of sintered magnet by adding a prescribed quantity or below of particles contained with a specific grain size to the material. CONSTITUTION:Electrolytic Fe and Al, metallic Nd, Dy and B (all with the purity of 99.9...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
1. Verfasser: SHIOTANI KATSUHIKO
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
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:PURPOSE:To improve sintering property of a pressed powder material and coercive force of sintered magnet by adding a prescribed quantity or below of particles contained with a specific grain size to the material. CONSTITUTION:Electrolytic Fe and Al, metallic Nd, Dy and B (all with the purity of 99.9wt.%) are weighted. They are melted by a high frequency wave method in vacuum, casted in water-cooled mold. An ingot of Nd29.2Dy3.3B1.1Al0.3 Fe66.1 (weight ratio) is obtained. Coarse crushing of this ingot followed by jet mill crushing of the particles, using compressed nitrogen gas as a carrier provides the powder with the average grain size 2-10mum and containing less than 6wt.% of granule with the grain size more than 20mum.