US4650519A
Expired / Lapsed
US
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Nickel aluminide compositions
Assignee: General Electric Co
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Filing: 1985-10-03
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Granted: 1987-03-17
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Expires: 2005-10-03
Abstract
Abstract A metal body having high tensile strength and ductility at temperatures over 1000° F. is provided. The body is prepared by hot isostatic pressing of powder formed by atomization of a melt of an alloy. The alloy composition is according to the formula (Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y wherein x is at least 0.05, and wherein y is 0.10 to 2.0, and wherein z is 0.23 to 0.25. The consolidated body is suitable for machining to final dimensions. To relieve stresses developed from the machining the body may be annealed for a couple of hours at temperatures between 800° C. and 1200° C.
Inventors
- 👤 Keh-Minn Chang
- 👤 Shyh-Chin Huang
- 👤 Alan I. Taub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:53
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/04; C22C1/0433; B; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B22F3/15; B22F9/00; B22F9/002; B22F9/008; C22C19/00; C22C19/007
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
111 words
A method of producing an article of a tri-nickel aluminide base alloy of improved strength and ductility which comprises, forming a melt of a boron doped tri-nickel aluminide of the following composition (Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y wherein x is at least 0.05, and wherein y is 0.10 to 2.0, and wherein z is 0.23 to 0.25, rapidly solidifying the melt by gas atomization of the melt to fine particles, consolidating the particles so produced by hot isostatic pressing for a time and at a temperature above 1000° C., and a pressure above 15 ksi to form a dense article, and annealing the formed article at a temperature above about 800° C.
Claim 2
Independent Claim
111 words
A method of producing an article of a tri-nickel aluminide base alloy of improved strength and ductility which comprises, forming a melt of a boron doped tri-nickel aluminide of the following composition (Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y wherein x is at least 0.05, and wherein y is 0.10 to 2.0, and wherein z is 0.23 to 0.25, rapidly solidifying the melt by gas atomization of the melt to fine particles, consolidating the particles so produced by hot isostatic pressing for a time and at a temperature above 1000° C., and a pressure above 15 ksi to form a dense article, and annealing the formed article at a temperature above about 800° C.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein x is between 0.05 and 0.3.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein x is between 0.05 and 0.2.
Claim 5
Dependent Claim
10 words
The method of claim 1 wherein x is about 0.10.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein the consolidated particles are -100 mesh.
Claim 7
Dependent Claim
15 words
The method of claim 1 wherein the consolidating temperature is between 1000° and 1200° C.
Claim 8
Dependent Claim
13 words
The method of claim 1 wherein the consolidating temperature is about 1150° C.
Claim 9
Dependent Claim
16 words
The method of claim 1 wherein the annealing temperature is between 800° C. and 1200° C.
Claim 10
Dependent Claim
13 words
The method of claim 1 wherein the annealing temperature is about 1000° C.
Claim 11
Dependent Claim
14 words
The method of claim 1 wherein the boron content is about 1.0 atom percent.
Claim 12
Dependent Claim
93 words
An article having high tensile strength and elongation properties at temperatures of over 1000° F. which comprises a body of particles consolidated to a coherent structure, said particles having a L1 2 crystalline structure, said particles having a boron doped tri-nickel aluminide base composition according to the formula (Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y wherein x is at least 0.05, and wherein y is 0.10 to 2.0, and wherein z is 0.23 to 0.25 and said body having tensile strength greater than about 200 ksi and an elongation greater than about 30% at room temperature.
Claim 13
Dependent Claim
93 words
An article having high tensile strength and elongation properties at temperatures of over 1000° F. which comprises a body of particles consolidated to a coherent structure, said particles having a L1 2 crystalline structure, said particles having a boron doped tri-nickel aluminide base composition according to the formula (Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y wherein x is at least 0.05, and wherein y is 0.10 to 2.0, and wherein z is 0.23 to 0.25 and said body having tensile strength greater than about 200 ksi and an elongation greater than about 30% at room temperature.
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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) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |