Fabrication of metal-ceramic composites
AssigneeThe United States of America as represented by the Secretary of the Army
InventorsJames W. McCauley, Dennis J. Viechnicki, Frederick Schmid
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Abstract
The unidirectional solidification of a metal-ceramic composite in a system omprising the positioning of a seed crystal in a crucible, adding a portion of premelted ceramic material, a metallic material, and the remainder of the premelted ceramic. The temperature of the ceramic material is raised to about 50.degree.C above its melting point and then slowly decreased with a corresponding increase in the flow of an inert coolant gas through the system thereby unidirectionally solidifying the material to produce a single crystal having the orientation of the seed.
Claims7
A constrained single crystal metal ceramic grown from seed in a crucible and having the orientation of the seed, said crystal having incorporated therein a metallic net, the metallic net having been positioned so that on the unidirectional solidification of the ceramic material, the crystal grew through the metallic net.
Dependencies are inferred from the claim text.