EP 3507039 A1 20190710 - RECYCLING METHOD FOR PRODUCING MAGNETIC ISOTROPIC POWDERS
Title (en)
RECYCLING METHOD FOR PRODUCING MAGNETIC ISOTROPIC POWDERS
Title (de)
RECYCLINGVERFAHREN ZUR HERSTELLUNG ISOTROPER, MAGNETISCHER PULVER
Title (fr)
PROCÉDÉ DE RECYCLAGE POUR LA FABRICATION DE POUDRE ISOTROPE MAGNÉTIQUE
Publication
Application
Priority
- DE 102016216353 A 20160830
- EP 2017071547 W 20170828
Abstract (en)
[origin: WO2018041776A1] The invention relates to a recycling method for producing magnetic isotropic powders, having the following steps: a) providing a magnetic alloy which comprises a1) at least one rare-earth metal, a2) at least one transition metal, and a3) boron; b) hydrogenating the alloy from step a) in a hydrogen-containing atmosphere at temperatures ranging from 0 to 600 °C and at a hydrogen partial pressure ranging from 10,000 to 15,000,000 Pa, thereby forming monocrystalline particles; c) disproportioning the particles from step b) in a hydrogen-containing atmosphere at temperatures ranging from more than 600 to 1,000 °C at a hydrogen partial pressure ranging from 30,000 to 1,000,000 Pa; and d) desorbing and subsequently recombining the hydrogen, thereby forming isotropic powder particles; wherein the alloy provided in step a) is partly or completely scrap magnetic material. The invention additionally relates to the powders which can be produced using said method and to the use thereof.
IPC 8 full level
B22F 5/00 (2006.01); B22F 8/00 (2006.01); B22F 9/00 (2006.01); B22F 9/02 (2006.01); C22B 9/05 (2006.01); C22B 9/14 (2006.01); C22B 59/00 (2006.01); C22C 38/00 (2006.01); H01F 1/057 (2006.01)
CPC (source: EP US)
B22F 5/00 (2013.01 - EP); B22F 8/00 (2013.01 - EP US); B22F 9/023 (2013.01 - EP); C22B 59/00 (2013.01 - EP); C22C 38/002 (2013.01 - EP); C22C 38/005 (2013.01 - EP); C22C 38/06 (2013.01 - EP); C22C 38/10 (2013.01 - EP); C22C 38/14 (2013.01 - EP); C22C 38/16 (2013.01 - EP); H01F 1/0573 (2013.01 - EP); H01F 1/0578 (2013.01 - EP); B22F 2009/001 (2013.01 - EP); B22F 2998/10 (2013.01 - EP); C22C 2202/02 (2013.01 - EP); Y02P 10/20 (2015.11 - EP); Y02W 30/50 (2015.05 - EP)
Citation (search report)
See references of WO 2018041776A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DE 102016216353 A1 20180301; EP 3507039 A1 20190710; WO 2018041776 A1 20180308
DOCDB simple family (application)
DE 102016216353 A 20160830; EP 17764346 A 20170828; EP 2017071547 W 20170828