EP 0663961 A1 19950726 - MAGNETOSTRICTIVE POWDER COMPOSITE AND METHODS FOR THE MANUFACTURE THEREOF.
Title (en)
MAGNETOSTRICTIVE POWDER COMPOSITE AND METHODS FOR THE MANUFACTURE THEREOF.
Title (de)
MAGNETOSTRIKTIVES PULVERKOMPOSIT UND VERFAHREN ZU DESSEN HERSTELLUNG.
Title (fr)
COMPLEXE DE POUDRE MAGNETOSTRICTIVE ET PROCEDES DE FABRICATION.
Publication
Application
Priority
- SE 9200331 W 19920519
- SE 9101535 A 19910522
Abstract (en)
[origin: WO9220829A1] Magnetostrictive powder composite and method for the manufacturing of the magnetostrictive powder composite. The powder composite according to the invention is preferably used as a magnetostrictive element in sound projectors and vibration generators, transducers, actuators and in linear motors. The powder composite consists of magnetostrictive powder grains with chemical composition (RE)xT1-x, where RE represents one or a mixture of several rare earth metals, T represents Fe, Ni, Co or Mn or a mixture of these metals and x represents atomic fraction assuming a value between 0 and 1, whereby the grains are held together by a binder. The powder composite is formed in such a way that it exhibits a homogeneous magnetic flux, has a good strength and can be made with a built-in precompression. It can be equipped with coolant channels and/or with coil loops. The powder composite is produced by pressing together the magnetostrictive powder grains and the binder in order to plastically deform the grains, either completely or partially, which causes the magnetic domains in the grains to align perpendicularly to the applied compression pressure. In an alternative mode of execution according to the invention isostatic pressing is used.
IPC 1-7
IPC 8 full level
B29C 70/58 (2006.01); B29C 70/62 (2006.01); C04B 14/34 (2006.01); C04B 14/36 (2006.01); C22C 1/04 (2006.01); C22C 32/00 (2006.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01); C22C 49/00 (2006.01); H01F 1/03 (2006.01); H01F 1/24 (2006.01); H01F 1/26 (2006.01); H01L 41/20 (2006.01)
CPC (source: EP)
B29C 70/58 (2013.01); B29C 70/62 (2013.01); C04B 14/34 (2013.01); C04B 14/36 (2013.01); C22C 32/0094 (2013.01); C22C 49/00 (2013.01); H01F 1/0306 (2013.01); H01F 1/24 (2013.01); H01F 1/26 (2013.01); H10N 35/85 (2023.02); B22F 2998/00 (2013.01); B29C 2791/004 (2013.01); B29C 2791/008 (2013.01); B29K 2105/12 (2013.01); B29K 2105/16 (2013.01); B29K 2503/06 (2013.01); B29K 2995/0008 (2013.01)
Citation (search report)
See references of WO 9220829A1
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
WO 9220829 A1 19921126; AU 1870692 A 19921230; CA 2102501 A1 19921123; EP 0663961 A1 19950726; JP H06507676 A 19940901; SE 468655 B 19930222; SE 9101535 D0 19910522; SE 9101535 L 19921123
DOCDB simple family (application)
SE 9200331 W 19920519; AU 1870692 A 19920519; CA 2102501 A 19920519; EP 92917301 A 19920519; JP 51016992 A 19920519; SE 9101535 A 19910522