EP 0134403 B1 19871216 - METHOD OF PREPARING A LITHIUM-ALUMINIUM COMPOUND BY POWDER METALLURGY, AND ITS USE
Title (en)
METHOD OF PREPARING A LITHIUM-ALUMINIUM COMPOUND BY POWDER METALLURGY, AND ITS USE
Publication
Application
Priority
DE 3330597 A 19830825
Abstract (en)
[origin: EP0134403A1] 1. A powder-metallurgical process for the production of an alloying addition, consisting of a pure beta-phase Al-Li compound, containing between 44 to 55 atom-%, or 17 or 25 weight-%, with the corresponding content of aluminium between 56 to 45 atom-% or 83 to 75 weight-%, using the following steps : a) Weighing and mixing of the elementary lithium and aluminium in powder form in a weight ratio of 1:5 to 1:3 under a protective atmosphere (argon or helium) ; b) charging the powder mixture into a heatable extruding die, degassing the mixture by applying a vacuum at temperature below the melting point of lithium ; c) extruding the mixture ; d) performing the reacting sintering of the extrudate in vacuum or under a protective atmosphere, characterized in that by heating the extrudate in the extrusion die without pressure at a heating rate of 5 to 50 degrees C/min to a temperature from approx. 450 degrees C to closely below the peritectic temperature of 520 degrees C at the maximum.
IPC 1-7
IPC 8 full level
CPC (source: EP)
C22C 1/03 (2013.01); C22C 1/0416 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0134403 A1 19850320; EP 0134403 B1 19871216; AT E31429 T1 19880115; DE 3330597 A1 19850314; DE 3330597 C2 19860724; DE 3468128 D1 19880128
DOCDB simple family (application)
EP 84105154 A 19840507; AT 84105154 T 19840507; DE 3330597 A 19830825; DE 3468128 T 19840507