Alloys or metallic compositions – Magnesium base – Lanthanide containing
Patent
1991-02-11
1993-08-24
Andrews, Melvyn J.
Alloys or metallic compositions
Magnesium base
Lanthanide containing
420542, 420590, C22C 102
Patent
active
052386465
ABSTRACT:
A method for making a light metal-rare earth metal alloy comprises adding a pellet to a substantially flux-free bath of molten light metal, said pellet including a mixture of rare earth metal-containing compound and one or more light metal powders. On a preferred basis, such mixtures comprise scandium oxide, up to about 10 wt. % aluminum powder and a substantial majority of magnesium powder, all of which are substantially similar in median particle size. This mixture is preferably compacted under a pressure of about 7 kpsi or more, then added to a bath of molten magnesium or molten aluminum to make magnesium-scandium, magnesium-aluminum-scandium, or aluminum-magnesium-scandium alloys therefrom. There is further disclosed a method for making an alloy containing about 7-12 wt. % lithium, about 2-7 wt. % aluminum, about 0.4-2 wt. % scandium, up to about 2 wt. % zinc and up to about 1 wt. % manganese, the balance magnesium and impurities.
REFERENCES:
patent: 3503738 (1970-03-01), Cooper
patent: 5037608 (1991-08-01), Tarcy et al.
patent: 5059390 (1991-10-01), Burleigh et al.
Burleigh T. David
Gavasto Thomas M.
Tarcy Gary P.
Wyss Rebecca K.
Aluminum Company of America
Andrews Melvyn J.
Sullivan Jr. Daniel A.
Topolosky Gary P.
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