SUB-MICRON PARTICLES OF RARE EARTH AND TRANSITION METALS AND ALLOYS, INCLUDING RARE EARTH MAGNET MATERIALS

• Main Authors: PROSPERI, Davide, BEVAN, Alex, Ivor, TUDOR, Catalina, O, ZAKOTNIK, Miha, FURLAN, Gojmir
• Format: Patent
• Language: English; French
• Published: 22.02.2018
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; 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

The present disclosure is directed to methods of preparing substantially spherical metallic alloyed particles, having micron and sub-micron (i.e., nanometer)-scaled dimensions, and the powders so prepared, as well as articles derived from these powders. In particular embodiments, these metallic alloyed particles, comprising rare earth metals, can be prepared in sizes as small 80 nm in diameter with size variances as low as 2-5%. La présente invention concerne des procédés de préparation de particules alliées métalliques, sensiblement sphériques, de dimensions de l'ordre du micron et inférieures au micron (c'est-à-dire de l'ordre du nanomètre), les poudres ainsi préparées, ainsi que des articles obtenus avec ces poudres. Dans des modes de réalisation particuliers, de telles particules alliées métalliques, comprenant des métaux des terres rares, peuvent être fabriquées à des tailles aussi petites que 80 nm de diamètre, avec des variations de taille d'à peine 2 à 5 %.