ANISOTROPIC RARE-FARTH PERMANENT MAGNETIC MATERIAL AND MANUFACTURE THEREOF

• Main Authors: OHASHI TAKESHI, NOMURA TADAO
• Format: Patent
• Language: English
• Published: 19.12.2000
• Edition: 7
• Subjects: ALLOYS; ARTIFICIAL STONE; BASIC ELECTRIC ELEMENTS; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; INDUCTANCES; LIME, MAGNESIA; MAGNETS; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; NANOTECHNOLOGY; PERFORMING OPERATIONS; REFRACTORIES; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SLAG; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSFORMERS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; TREATMENT OF NATURAL STONE

PROBLEM TO BE SOLVED: To obtain an anisotropic rare-earth permanent magnet and an anisotropic rare-earth permanent magnetic material, having a texture such that hard magnetic phases and soft magnetic phases are scattered finely and the axes of easy magnetization of the hard magnetic phases are oriented. SOLUTION: In a method or manufacturing an anisotropic rare-earth permanent magnet material, having such as internal texture where hard magnetic phases and soft magnetic phases are scattered finely, a quenched tin belt of an alloy material having a composition that can yield hard magnetic phases, soft magnetic phases, and nonmagnetic phases having a lower melting point than the magnetic phases have when heat-treated is crystallized by heating the belt to a temperature higher than the melding point of the nonmagnetic phase or temperature at which eutectic crystals occur between the nonmagnetic phase and the other phases in a magnetic field of 3T or higher.