US4885216A
Expired / Lapsed
US
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High strength nickel base single crystal alloys
Assignee: Honeywell International Inc
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Filing: 1988-09-22
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Granted: 1989-12-05
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Expires: 2008-09-22
Abstract
Abstract Disclosed are novel nickel base single crystal alloy compositions consisting essentially of, by weight, about 8.0-14.0% chromium, 1.5-6.0% cobalt, 0.5-2.0% molybdenum, 3.0-10% tungsten, 2.5-7.0% titanium, 2.5-7.0% aluminum, 3.0-6.0% tantalum, about 0.005% to about 1.0% each of hafnium and/or silicon, optional minor amounts of yttrium, lanthanum and/or manganese, and the balance nickel. Methods of thermal treatment and coating of the novel alloys to enhance their mechanical properties are also disclosed, as are articles produced by such methods.
Inventors
- 👤 Subhash K. Naik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:32
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/056; C30; C30B; C30B29/00; C30B29/10; C30B29/52; C30B33/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
100 words
A single crystal alloy composition having improved oxidation/corrosion resistance and high strength at elevated temperatures consisting essentially of, by weight, about 8.0% to about 14.0% chromium; about 1.5% to about 6.0% cobalt; about 0.5% to about 2.0% molybdenum; about 3.0% to about 10.0% tungsten; about 2.5% to about 7.0% titanium; about 2.5% to about 7.0% aluminum; about 3.0% to about 6.0% tantalum; about 0.005% to about 1% each, of at least one additive from the group consisting of hafnium and silicon; from 0 to 1% yttrium; from 0 to 1% lanthanum; from 0 to 1.5% manganese, and the balance nickel.
Claim 2
Dependent Claim
100 words
A single crystal alloy composition having improved oxidation/corrosion resistance and high strength at elevated temperatures consisting essentially of, by weight, about 8.0% to about 14.0% chromium; about 1.5% to about 6.0% cobalt; about 0.5% to about 2.0% molybdenum; about 3.0% to about 10.0% tungsten; about 2.5% to about 7.0% titanium; about 2.5% to about 7.0% aluminum; about 3.0% to about 6.0% tantalum; about 0.005% to about 1% each, of at least one additive from the group consisting of hafnium and silicon; from 0 to 1% yttrium; from 0 to 1% lanthanum; from 0 to 1.5% manganese, and the balance nickel.
Claim 3
Dependent Claim
93 words
The composition of claim 1 consisting essentially of, by weight, about 9.0% to about 12.0% chromium; about 2.5% to about 5.0% cobalt; about 0.8% to about 1.5% molybdenum; about 4.0% to about 8.0% tungsten; about 2.5% to about 5.0% titanium; about 3.0% to about 6.0% aluminum; about 4.0% to about 5.0% tantalum; from about 0.005% up to about 0.5% hafnium; from about 0.005% up to about 0.5% silicon; from 0 up to about 0.5% yttrium; from 0 up to about 0.5% manganese; from 0 up to about 0.2% lanthanum; and the balance nickel.
Claim 4
Dependent Claim
32 words
The composition of claim 1 containing at least about 0.005% by weight up to the stated maximum content of at least one additive from the group consisting of yttrium, lathanum and manganese.
Claim 5
Dependent Claim
28 words
The composition of claim 3 comprising from 0 up to about 0.5% yttrium; from 0 up to about 0.5% manganese; and from 0 up to about 0.2% lanthanum.
Claim 6
Dependent Claim
13 words
The composition of claim 1 further comprising about 0.005% to about 1.0% yttrium.
Claim 7
Dependent Claim
13 words
The composition of claim 1 further comprising about 0.005% to about 1.0% lanthanum.
Claim 8
Dependent Claim
13 words
The composition of claim 1 further comprising about 0.005% to about 1.5% manganese.
Claim 9
Dependent Claim
13 words
The composition of claim 1 further comprising about 0.01% to about 0.5% yttrium.
Claim 10
Dependent Claim
13 words
The composition of claim 1 further comprising about 0.01% to about 0.2% lanthanum.
Claim 11
Dependent Claim
12 words
The composition of claim 1 further comprising about 0.01% to 0.5% manganese.
Claim 12
Dependent Claim
21 words
The composition of claim 1 wherein the total amount of yttrium, lanthanum and manganese is from 0.01% up to about 1.0%
Claim 13
Dependent Claim
101 words
A single crystal alloy composition having improved oxidation/corrosion resistance and high strength at elevated temperatures consisting essentially of, by weight, about 8.0% to about 14.0% chromium; about 1.5% to about 6.0% cobalt; about 0.5% to about 2.0% molybdenum; about 3.0% to about 10.0% tungsten; about 2.5% to about 7.0% titanium; about 2.5% to about 7.0% aluminum; about 3.0% to about 6.0% tantalum; about 0.005% to about 1% each, of at least one additive from the group consisting of hafnium and silicon; from 0 to 1% yttrium, from 0 to 1% lanthanum and from 0 to 1.5% manganese; and the balance nickel.
Claim 14
Dependent Claim
101 words
A single crystal alloy composition having improved oxidation/corrosion resistance and high strength at elevated temperatures consisting essentially of, by weight, about 8.0% to about 14.0% chromium; about 1.5% to about 6.0% cobalt; about 0.5% to about 2.0% molybdenum; about 3.0% to about 10.0% tungsten; about 2.5% to about 7.0% titanium; about 2.5% to about 7.0% aluminum; about 3.0% to about 6.0% tantalum; about 0.005% to about 1% each, of at least one additive from the group consisting of hafnium and silicon; from 0 to 1% yttrium, from 0 to 1% lanthanum and from 0 to 1.5% manganese; and the balance nickel.
Claim 15
Dependent Claim
94 words
The composition of claim 12 consisting essentially of, by weight, about 9.0% to about 12.0% chromium; about 2.5% to about 5.0% cobalt; about 0.8% to about 1.5% molybdenum; about 4.0% to about 8.0% tungsten; about 2.5% to about 5.0% titanium; about 3.0% to about 6.0% aluminum; about 4.0% to about 5.0% tantalum; about 0.01% to about 1% each, of at least one additive from the group consisting of hafnium and silicon; about 0.01% up to of one or more elements selected from the group consisting of yttrium, lanthanum and manganese; and the balance nickel.
Claim 16
Dependent Claim
12 words
The composition of claim 12 containing from 0.005% up to 0.5% hafnium.
Claim 17
Dependent Claim
12 words
The composition of claim 12 containing from 0.005% up to 0.5% silicon.
Claim 18
Dependent Claim
34 words
An article of manufacture comprising a substrate material fabricated from the composition of claim 1, the substrate being coated with a layer of an aluminide deposit to impart improved high temperature oxidation/corrosion resistance thereto.
Claim 19
Dependent Claim
31 words
The article of claim 16 wherein the aluminide deposit is prepared from a NiAl alloy which contains from about 25 to about 40 percent by weight aluminum, the balance being nickel.
Claim 20
Dependent Claim
120 words
An article of manufacture comprising a substrate material fabricated from the composition of claim 1, the substrate being coated with an overlay coating to impart improved high temperature oxidation/corrosion resistance thereto, the overlay coating composition having the general formula MCrAlY wherein M is a solid solution of metal selected from the group consisting of nickel, cobalt, and mixtures of nickel and cobalt with molybdenum wherein the metals represented by M comprise 30 to 75 percent by weight of the coating; chromium comprises about 10 to about 40 percent by weight of the coating; aluminum comprises about 5 to about 20 percent by weight of the coating and yttrium comprises about 0.1 to about 1.0 percent by weight of the coating.
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| 3.5 Years (Year 4) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
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