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1. WO2011032432 - RARE EARTH PERMANENT MAGNETIC MATERIAL AND PREPARATION METHOD THEREOF

Publication Number WO/2011/032432
Publication Date 24.03.2011
International Application No. PCT/CN2010/075594
International Filing Date 30.07.2010
IPC
H01F 1/053 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
032of hard-magnetic materials
04metals or alloys
047Alloys characterised by their composition
053containing rare earth metals
CPC
B22F 2998/10
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
2998Supplementary information concerning processes or compositions relating to powder metallurgy
10Processes characterised by the sequence of their steps
B22F 2999/00
BPERFORMING OPERATIONS; TRANSPORTING
22CASTING; POWDER METALLURGY
FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER
2999Aspects linked to processes or compositions used in powder metallurgy
C22C 38/005
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
005containing rare earths, i.e. Sc, Y, Lanthanides
C22C 38/06
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
06containing aluminium
C22C 38/10
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
10containing cobalt
C22C 38/12
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
12containing tungsten, tantalum, molybdenum, vanadium, or niobium
Applicants
  • BYD COMPANY LIMITED [CN]/[CN] (AllExceptUS)
  • GONG, Qing [CN]/[CN] (UsOnly)
  • DENG, Xiaoxia [CN]/[CN] (UsOnly)
  • DU, Xin [CN]/[CN] (UsOnly)
Inventors
  • GONG, Qing
  • DENG, Xiaoxia
  • DU, Xin
Agents
  • TSINGYIHUA INTELLECTUAL PROPERTY LLC
Priority Data
200910190316.015.09.2009CN
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) RARE EARTH PERMANENT MAGNETIC MATERIAL AND PREPARATION METHOD THEREOF
(FR) MATÉRIAU À BASE DE LANTHANIDE À AIMANTATION PERMANENTE ET SON PROCÉDÉ DE PRÉPARATION
Abstract
(EN)
A rare earth permanent magnetic material is provided, which is represented by the general formula of Ra-x-yHoxDyyFe1-a-b-c-dCodMcBb, wherein x, y, a, b, c and d are weight percentages of corresponding elements, in which 28%≤ a ≤34%, 0.95%≤ b ≤1.3%, 0≤ c ≤1.5%, 1%≤ d ≤10%, 15%≤ x ≤20% and 3%≤ y ≤8%; wherein R is a rare earth element, which is selected from the group consisting of Nd, Pr, La, Ce, Gd, Tb and combinations thereof; and wherein M is selected from the group consisting of Al, Cu, Ti, V, Cr, Zr, Hf, Nb, Sn, Mo, Ga, Si and combinations thereof. A method for preparing the rare earth permanent magnetic material is also provided.
(FR)
L'invention concerne un matériau à base de lanthanide à aimantation permanente, celui-ci étant représenté par la formule générale Ra-x-yHoxDyyFe1-a-b-c-dCodMcBb, où x, y, a, b, c et d sont les pourcentages en poids des éléments correspondants, avec 28 % ≤ a ≤ 34 %, 0,95 % ≤ b ≤ 1,3 %, 0 ≤ c ≤ 1,5 %, 1 % ≤ d ≤ 10 %, 15 % ≤ x ≤ 20 % et 3 % ≤ y ≤ 8 % ; R est un lanthanide choisi dans le groupe constitué par Nd, Pr, La, Ce, Gd, Tb et leurs combinaisons ; et M est choisi dans le groupe constitué par Al, Cu, Ti, V, Cr, Zr, Hf, Nb, Sn, Mo, Ga, Si et leurs combinaisons. L'invention concerne également un procédé de préparation du matériau à base de lanthanide à aimantation permanente.
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