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US 5,320,800 AGranted
Nanocrystalline ceramic materials
AssigneesArch Development Corporation, Northwestern University
InventorsRichard W. Siegel, G. William Nieman, Julia R. Weertman
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Abstract
A method for preparing a treated nanocrystalline metallic material. The method of preparation includes providing a starting nanocrystalline metallic material with a grain size less than about 35 nm, compacting the starting nanocrystalline metallic material in an inert atmosphere and annealing the compacted metallic material at a temperature less than about one-half the melting point of the metallic material.
Claims3
A method of preparing a treated nanocrystalline metallic material, comprising the steps of:
- providing a starting nanocrystalline metallic material having a mean grain size less than about 35 nm;
- compacting said starting nanocrystalline metallic material in a selected inert atmosphere, said compacted metallic material having the mean grain size less than about 35 nm;
- and
- annealing said compacted metallic material at a temperature less than about one-half of the melting point of said metallic material.
1 more element
Dependencies are inferred from the claim text.