Method of forming ceramic particles in-situ in metal
AssigneeAluminum Company of America
InventorsMen Glenn Chu, Siba P. Ray
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Abstract
A novel method for producing a ceramic phase particle dispersoid in metal and a novel product composed thereof. The method includes (a) providing a molten composition consisting essentially of molten aluminum alloy containing molten metal selected from the group consisting of Zr, V and combinations thereof, (b) providing a chloride salt containing fine carbon particles; and (c) reacting the chloride salt containing fine carbon particles in the molten aluminum metal with the molten metal to form a uniform distribution of finely sized carbide particles formed and dispersed in-situ in an aluminum alloy matrix.
Claims17
A method of forming finely sized carbide phase particles formed in situ in a molten metal or molten metal alloy, comprising:
- (a) providing a molten composition consisting essentially of molten aluminum alloy and molten metal selected from the group consisting of Zr, V and combinations thereof;
- (b) providing a chloride salt containing fine carbon particles;
- and
- (c) reacting said chloride salt containing fine carbon particles in said molten aluminum metal with said molten metal to form a uniform distribution of finely sized carbide particles formed and dispersed in-situ in an aluminum alloy matrix.
A method of forming finely sized carbide phase particles formed in situ in a molten aluminum metal or aluminum metal alloy comprising:
- (a) providing a molten composition consisting essentially of molten aluminum alloy and molten metal selected form the group consisting of Zr, V and combinations thereof;
- (b) providing a chloride salt containing carbon particles, wherein said salt comprises NaCl and KCl in a weight/weight ratio within the range of about 0.8-1.2 and of MgCl.sub.2 and CaCl.sub.2 in amounts comprising up to about 5-10% by weight of the salt mixture;
- and
- (c) reacting said chloride salt containing carbon particles in said molten aluminum alloy by vigorously stirring said aluminum alloy and said chloride salt containing carbon particles to form a mixture of said molten metal in contact with a portion of said carbon particles at an elevated temperature above the liquidus of the aluminum alloy to form a unagglomerated distribution of finely sized ceramic phase particles having an average particle diameter of less than about 0.3 microns formed and dispersed in-situ in an aluminum metal matrix.
A method of forming finely sized carbide phase particles formed in situ in a molten aluminum metal or aluminum metal alloy comprising:
- (a) providing a molten composition comprising a matrix liquid of aluminum or aluminum alloy metal and at least one carbide-forming element selected from the group consisting of Ti, Sc, Hf, Nb, Zr, Mo, and V;
- (b) providing a chloride salt containing carbon particles, wherein said salt comprises NaCl and KCl in a weight/weight ratio within the range of about 0.8-1.2 and of MgCl.sub.2 and CaCl.sub.2 in amounts comprising up to about 5-10% by weight of the salt mixture;
- and
- (c) reacting said chloride salt containing carbon particles in said molten aluminum alloy by vigorously stirring said aluminum alloy and said chloride salt containing carbon particles to form a mixture of said molten metal liquid in contact with a portion of said carbon particles at an elevated temperature above the liquidus of the aluminum alloy to form a unagglomerated distribution of finely sized ceramic phase particles having an average particle diameter of less than about 0.3 microns formed and dispersed in-situ in an aluminum metal matrix.
Dependencies are inferred from the claim text.