Title (en)

RAPID COMPACTION OF RARE EARTH-TRANSITION METAL ALLOYS IN A FLUID-FILLED DIE

Publication

EP 0331286 A3 19891102 (EN)

Application

EP 89300871 A 19890130

Priority

US 16355888 A 19880303

Abstract (en)

[origin: EP0331286A2] A novel method is provided for making large, fully densified rare earth-transition metal magnets. The method involves rapid compaction of very finely crystalline rare earth-transition metal alloy particles (2) retained in a die (12), using pressure applied to a substantially incompressible fluid medium (6) surrounding said particles (2).

IPC 1-7

B22F 3/14; H01F 1/04

IPC 8 full level

B22F 3/08 (2006.01); B22F 3/12 (2006.01); B22F 3/14 (2006.01); B22F 3/15 (2006.01); C22C 33/02 (2006.01); H01F 1/055 (2006.01); H01F 1/057 (2006.01); H01F 1/08 (2006.01); H01F 41/02 (2006.01)

CPC (source: EP)

B22F 3/1208 (2013.01); B22F 3/14 (2013.01); B22F 3/15 (2013.01); B30B 11/002 (2013.01); H01F 1/0556 (2013.01); H01F 1/0576 (2013.01); H01F 41/0266 (2013.01)

Citation (search report)

• [Y] EP 0094164 A1 19831116 - KELSEY HAYES CO [US]
• [YD] EP 0133758 A2 19850306 - GEN MOTORS CORP [US]
• [A] EP 0203311 A1 19861203 - KERNFORSCHUNGSZ KARLSRUHE [DE]
• [A] US 4612161 A 19860916 - CLINE CARL F [US]
• [A] GB 2165862 A 19860423 - HITACHI SHIPBUILDING ENG CO
• [A] EP 0196448 A1 19861008 - NIPPON DENSO CO [JP]
• [A] PATENT ABSTRACTS OF JAPAN, Vol. 9, No. 228 (C-303)[1951], 13th September 1985; & JP-A-60 089 533 (NAMIKI SEIMITSU HOUSEKI K.K.) (20-05-1985)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0331286 A2 19890906; EP 0331286 A3 19891102; JP H01287204 A 19891117

DOCDB simple family (application)

EP 89300871 A 19890130; JP 5020189 A 19890303