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US 5,312,584 AGranted
Moldless/coreless single crystal castings of nickel-aluminide
AssigneeGeneral Motors Corporation
InventorsDonald J. Frasier, Ralph E. Peeler, John H. Lane, Heidi Mueller-Largent
Life of this patent
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Abstract
Disclosed is a method of making moldless/coreless single crystal castings of NiAl(.beta.') alloys. Drops of molten NiAl(.beta.') alloy is deposited on a starter seed block of single crystal alloy and casting structures are epitaxially grown to predetermined configurations and shapes by repeatedly dropping and solidifying molten NiAl(.beta.') materials.
Claims5
A method comprising:
- (a) providing a NiAl(.beta.') target;
- (b) positioning a seed block of a single crystal alloy beneath said target;
- (c) causing a selective portion of said target to melt so that a drip of molten NiAl(.beta.') is deposited on said block;
- (d) causing said drip of molten NiAl(.beta.') to slowly solidify so as to have a single crystal orientation.
- (e) repeating steps (c)-(d) to cast a first layer of a single crystal NiAl(.beta.') on the block,
- (f) causing a selective portion of said target to melt so that a drip of molten NiAl(.beta.') is deposited on a previously formed layer of single crystal NiAl(.beta.') and causing the drip of molten NiAl(.beta.') to slowly solidity so as to have a single crystal orientation, and
- (g) repeating step (f) to build successive layer of single crystal NiAl(.beta.') and to produce a product having a single crystal orientation of NiAl(.beta.') throughout and of of predetermined configuration and shape.
4 more elements
Dependencies are inferred from the claim text.