Process for rapid solidification of intermetallic-second phase composites
AssigneeMartin Marietta Corporation
InventorsStephen L. Kampe, John M. Brupbacher, Leontios Christodoulou, Dennis C. Nagle
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Abstract
This invention relates to a process for making in-situ precipitated second phase in an intermetallic matrix, which composite is rapidly solidified to form a product. The invention also relates to a rapidly solidified product comprising a second phase in both a stable particulate form and a metastable flake form dispersed in an intermetallic matrix.
Claims30
A method for the preparation of intermetallic-second phase composite materials, said method comprising:
- contacting reactive precursors of a second phase material and a solvent matrix material comprising an intermetallic or precursors thereof at a temperature sufficient to initiate the exothermic reaction of said second phase precursors to thereby form the second phase within said solvent matrix material;
- recovering a composite comprising an intermetallic containing matrix having particles of said second phase dispersed therein;
- and subjecting said composite to rapid solidification.
A method for the production of intermetallic-second phase composite materials containing a second phase, said method comprising precipitating at least one second phase material in an intermetallic matrix by contacting reactive second phase forming constituents, in the presence of a substantially non-reactive solvent matrix material in which the second phase forming constituents are more soluble than the second phase, at a temperature at which reaction of the reactive second phase forming constituents occurs, to precipitate the second phase in the solvent matrix material, rapidly quenching the intermetallic-second phase composite material at a rate in the range of approximately 10.sup.4 .degree. C. per second to 10.sup.8 .degree. C. per second, and recovering a rapidly solidified intermetallic-second phase composite material.
Dependencies are inferred from the claim text.