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US4162918A
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Rare earth metal doped directionally solidified eutectic alloy and superalloy materials
Assignee: General Electric Co
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Filing: 1977-11-02
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Granted: 1979-07-31
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Expires: 1997-11-02
Abstract
Abstract Less than 3 weight percent of a rare earth metal is employed in doping a directionally solidified eutectic alloy or a superalloy material to minimize the formation of a metal-ceramic reaction layer during casting and solidification thereof.
Inventors
- 👤 Irvin C. Huseby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:09
CPC Classifications
C; C30; C30B; C30B21/00; C30B21/02; B; B22; B22D; B22D23/00; B22D23/06; B22D23/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
59 words
A directionally solidifiable eutectic alloy casting material NiTaC-13 having a high resistance to metal-mold interface reaction during casting including less than 3 weight percent of a rare earth metal as a dopant material in its material composition, the rare earth metal is one whose metal cation is in the ceramic material comprising the mold and/or core in contact therewith.
Claim 2
Dependent Claim
59 words
A directionally solidifiable eutectic alloy casting material NiTaC-13 having a high resistance to metal-mold interface reaction during casting including less than 3 weight percent of a rare earth metal as a dopant material in its material composition, the rare earth metal is one whose metal cation is in the ceramic material comprising the mold and/or core in contact therewith.
Claim 3
Dependent Claim
27 words
The casting material of claim 1 wherein the rare earth metal is one selected from the group consisting of Y, Sm, Nd, Gd, Dy, Er and Yb.
Claim 4
Dependent Claim
27 words
The casting material of claim 1 wherein less than 1 weight percent of the rare earth metal is present in the material composition as a dopant material.
Claim 5
Dependent Claim
27 words
The casting material of claim 3 wherein the rare earth metal is one selected from the group consisting of Y, Sm, Nd, Gd, Dy, Er and Yb.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-30 | 1983-01-29 | 1983-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-30 | 1987-01-29 | 1987-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-30 | 1991-01-29 | 1991-07-31 | $7700.00 | Window Closed / Lapsed |