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US 7,922,812 B2Granted
Method for growing single crystals of metals
AssigneeIntellectual Ventures Holding 40 LLC
InventorsJames R. Ciulik, Eric M. Taleff
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Abstract
A method for growing large single crystals of metals is disclosed. A polycrystalline form of a metal specimen is initially heated in a non-oxidizing environment. A minimum plastic strain is then applied to the heated metal specimen to initiate the growth of a selected grain within the heated metal specimen. Additional plastic strain is subsequently applied to the heated metal specimen to propagate the growth of the selected grain to become a large single crystal.
Claims16
A method for growing a single-crystal metal, the method comprising:
- heating a polycrystalline metal specimen in a non-oxidizing environment;
- applying a first plastic strain to the heated polycrystalline metal specimen to initiate growth of a grain of the heated polycrystalline metal specimen by displacing distal ends of the heated polycrystalline metal specimen;
- and
- applying a second plastic strain to the heated polycrystalline metal specimen to propagate growth of the grain to form a single-crystal metal by displacing a first distal end of the heated polycrystalline metal specimen at a faster rate than a second distal end of the heated polycrystalline metal specimen.
1 more element
Dependencies are inferred from the claim text.