US4609528A
Expired / Lapsed
US
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Tri-nickel aluminide compositions ductile at hot-short temperatures
Assignee: General Electric Co
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Filing: 1985-10-03
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Granted: 1986-09-02
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Expires: 2005-10-03
Abstract
Abstract A method is taught for rendering a boron-doped tri-nickel aluminide resistant to mechanical failure while at intermediate temperatures of 600 DEG C. to 800 DEG C. due to a hot-short phenomena. The method involves incorporating between 0.05 and 0.30 of cobalt in the composition according to the expression (Ni1-x-zCoxAlz)100-yBy. The concentration of aluminum, z, is between 0.23 and 0.25 and the concentration of boron, y, is between 0.2 and 1.50 atomic percent. The composition is formed into a melt and the melt is rapidly solidified by atomization and consolidated. The consolidation may be simultaneous with the rapid solidification, as in spray forming, or sequential by atomization to a powder and consolidation of the powder by HIPping. The consolidated body is cold worked to increase the resistance of the body to failure at intermediate temperatures and may be annealed following the cold working.
Inventors
- 👤 Keh-Minn Chang
- 👤 Shyh-Chin Huang
- 👤 Alan I. Taub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:19
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; B; B22; B22F; B22F3/00; B22F3/12; B22F3/16; C22C1/00; C22C1/04; C22C1/0433
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
17 words
The method of improving the intermediate temperature properties of a boron doped tri-nickel aluminide composition which comprises
Claim 2
Independent Claim
17 words
The method of improving the intermediate temperature properties of a boron doped tri-nickel aluminide composition which comprises
Claim 3
Dependent Claim
58 words
forming a cobalt alloy of the aluminide according to the following expression: (Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y wherein x is between 0.05 and 0.30 z is between 0.23 and 0.25 y is between 0.2 and 1.50 and forming a melt of the alloy, rapidly solidifying the alloy from the melt, consolidating the alloy and cold working the consolidated alloy.
Claim 4
Dependent Claim
58 words
forming a cobalt alloy of the aluminide according to the following expression: (Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y wherein x is between 0.05 and 0.30 z is between 0.23 and 0.25 y is between 0.2 and 1.50 and forming a melt of the alloy, rapidly solidifying the alloy from the melt, consolidating the alloy and cold working the consolidated alloy.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein the alloy is annealed following the cold working.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein the cobalt ratio, x, is between 0.05 and 0.20.
Claim 7
Dependent Claim
13 words
The method of claim 1 wherein the cobalt ratio, x, is about 10.
Claim 8
Dependent Claim
15 words
The method of claim 1 wherein the aluminum ratio, z, is between 0.23 and 0.245.
Claim 9
Dependent Claim
13 words
The method of claim 1 wherein the aluminum ratio, z, is about 0.24.
Claim 10
Dependent Claim
15 words
The method of claim 1 wherein the boron concentration, y, is between 0.2 and 1.0.
Claim 11
Independent Claim
14 words
The method of clain 1 wherein the boron concentration is between 0.5 and 1.0.
Claim 12
Independent Claim
14 words
The method of clain 1 wherein the boron concentration is between 0.5 and 1.0.
Claim 13
Independent Claim
79 words
The method of improving the intermediate temperature properties of a boron doped tri-nickel aluminide which comprises forming a cobalt alloy of the aluminide according to the following expression: (Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y wherein x is between 0.05 and 0.30 z is between 0.23 and 0.25 y is between 0.2 and 1.50 forming a melt of the alloy, atomizing the melt onto a shaped, cooled, collecting surface to form a body and cold working the body of the tri-nickel aluminide.
Claim 14
Independent Claim
79 words
The method of improving the intermediate temperature properties of a boron doped tri-nickel aluminide which comprises forming a cobalt alloy of the aluminide according to the following expression: (Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y wherein x is between 0.05 and 0.30 z is between 0.23 and 0.25 y is between 0.2 and 1.50 forming a melt of the alloy, atomizing the melt onto a shaped, cooled, collecting surface to form a body and cold working the body of the tri-nickel aluminide.
Claim 15
Dependent Claim
17 words
The method of claim 9 in which the cold worked body is annealed following the cold working.
Claim 16
Dependent Claim
21 words
The method of claim 9 in which the cold worked body is annealed at about 1000° C. for about 2 hours.
Claim 17
Independent Claim
84 words
The method of improving the intermediate temperature properties of a boron doped tri-nickel aluminide which comprises forming a cobalt alloy of the aluminide according to the following expression: (Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y wherein x is between 0.05 and 0.30 z is between 0.23 and 0.25 y is between 0.2 and 1.50 forming a melt of the alloy, atomizing the melt to a powder, collecting the powder and HIPping the collected powder to form a body and cold working the body of the tri-nickel aluminide.
Claim 18
Independent Claim
84 words
The method of improving the intermediate temperature properties of a boron doped tri-nickel aluminide which comprises forming a cobalt alloy of the aluminide according to the following expression: (Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y wherein x is between 0.05 and 0.30 z is between 0.23 and 0.25 y is between 0.2 and 1.50 forming a melt of the alloy, atomizing the melt to a powder, collecting the powder and HIPping the collected powder to form a body and cold working the body of the tri-nickel aluminide.
Claim 19
Dependent Claim
17 words
The method of claim 12 in which the cold worked body is annealed following the cold working.
Claim 20
Dependent Claim
21 words
The method of claim 12 in which the cold worked body is annealed at about 1000° C. for about 2 hours.
Claim 21
Independent Claim
80 words
The method of improving the intermediate temperature properties of a boron doped tri-nickel aluminide which comprises forming a cobalt alloy of the aluminide according to the following expression: (Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y wherein x is between 0.05 and 0.30 z is between 0.23 and 0.25 y is between 0.2 and 1.50 forming a melt of the alloy, atomizing the melt into a powder, plasma spraying the powder to form a body and cold working the body of the tri-nickel aluminide.
Claim 22
Independent Claim
80 words
The method of improving the intermediate temperature properties of a boron doped tri-nickel aluminide which comprises forming a cobalt alloy of the aluminide according to the following expression: (Ni.sub.1-x-z Co.sub.x Al.sub.z).sub.100-y B.sub.y wherein x is between 0.05 and 0.30 z is between 0.23 and 0.25 y is between 0.2 and 1.50 forming a melt of the alloy, atomizing the melt into a powder, plasma spraying the powder to form a body and cold working the body of the tri-nickel aluminide.
Claim 23
Dependent Claim
17 words
The method of claim 15 in which the cold worked body is annealed following the cold working.
Claim 24
Dependent Claim
21 words
The method of claim 15 in which the cold worked body is annealed at about 1000° C. for about 2 hours.
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