Patent US4080204A successfully refreshed from Google Patents.
US4080204A
Expired / Lapsed
US
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Fenicraly alloy and abradable seals made therefrom
Assignee: Technetics Corp
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Filing: 1976-03-29
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Granted: 1978-03-21
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Expires: 1996-03-29
Abstract
Abstract Abradable seals for compressors and turbines are made of fibers and powders of an alloy consisting essentially of iron, nickel, chromium, aluminum, and yttrium. The alloy preferably contains 22-27 weight percent nickel, 18-22 weight percent chromium, 9-15 weight percent aluminum, 0.0005-0.05 weight percent yttrium, with the balance iron. Heat treatment of the alloy provides an aluminum rich phase which is uniformly dispersed throughout the alloy.
Inventors
- 👤 Carlino Panzera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:05
CPC Classifications
C; C22; C22C; C22C49/00; C22C49/02; C22C49/08; C22C38/00; C22C38/18; C22C38/40; F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12424
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
69 words
An alloy comprising from 2 to 15 weight percent aluminum, from 15 to 35 weight percent nickel, a minimum of 12 weight percent chromium, from 0.0005 to 0.5 weight percent elemental yttrium, and iron in an amount greater than any other metal, the aluminum and chromium having a combined concentration not exceeding 35 weight percent and the nickel and chromium having a combined concentration not exceeding 50 weight percent.
Claim 2
Dependent Claim
69 words
An alloy comprising from 2 to 15 weight percent aluminum, from 15 to 35 weight percent nickel, a minimum of 12 weight percent chromium, from 0.0005 to 0.5 weight percent elemental yttrium, and iron in an amount greater than any other metal, the aluminum and chromium having a combined concentration not exceeding 35 weight percent and the nickel and chromium having a combined concentration not exceeding 50 weight percent.
Claim 3
Dependent Claim
28 words
An alloy of claim 1 consisting essentially of 22-27 weight percent nickel, 18-22 weight percent chromium, 9-15 weight percent aluminum, 0.0005-0.05 weight percent yttrium, with the balance iron.
Claim 4
Dependent Claim
17 words
The alloy of claim 2 including an aluminum rich phase which is uniformly dispersed throughout the alloy.
Claim 5
Dependent Claim
25 words
The alloy of claim 3 where the aluminum rich phase is formed by holding the alloy at a temperature ranging between 2100° and 2200° F.
Claim 6
Dependent Claim
62 words
A metal fiber of an alloy consisting essentially of 22-27 weight percent nickel, 18-22 weight percent chromium, 9-15 weight percent aluminum, 0.0005-0.05 weight percent elemental yttrium, with the balance iron, said alloy including an aluminum rich phase which is uniformly dispersed throughout the alloy, the fiber having a diameter of less than approximately 35 microns and an aspect ratio greater than 10.
Claim 7
Dependent Claim
62 words
A metal fiber of an alloy consisting essentially of 22-27 weight percent nickel, 18-22 weight percent chromium, 9-15 weight percent aluminum, 0.0005-0.05 weight percent elemental yttrium, with the balance iron, said alloy including an aluminum rich phase which is uniformly dispersed throughout the alloy, the fiber having a diameter of less than approximately 35 microns and an aspect ratio greater than 10.
Claim 8
Dependent Claim
25 words
The fiber of claim 5 where the aluminum rich phase is formed by holding the alloy at a temperature ranging between 2100° and 2200° F.
Claim 9
Dependent Claim
101 words
An abradable seal made from fibers, powders, or composites of fibers and powders, each of said fibers and powders having a composition comprising from 2 to 15 weight percent aluminum, from 15 to 35 weight percent nickel, a minimum of 12 weight percent chromium, from 0.0005 to 0.5 weight percent yttrium and iron in an amount greater than any other metal, the aluminum and chromium having a combined concentration not exceeding 35 weight percent and the nickel and chromium having a combined concentration not exceeding 50 weight percent, the fibers and the powders having a diameter of 35 microns or less.
Claim 10
Dependent Claim
101 words
An abradable seal made from fibers, powders, or composites of fibers and powders, each of said fibers and powders having a composition comprising from 2 to 15 weight percent aluminum, from 15 to 35 weight percent nickel, a minimum of 12 weight percent chromium, from 0.0005 to 0.5 weight percent yttrium and iron in an amount greater than any other metal, the aluminum and chromium having a combined concentration not exceeding 35 weight percent and the nickel and chromium having a combined concentration not exceeding 50 weight percent, the fibers and the powders having a diameter of 35 microns or less.
Claim 11
Dependent Claim
13 words
The seal of claim 7 having a density of from 0.1 to 0.5.
Claim 12
Dependent Claim
31 words
The seal of claim 7 where the alloy consist essentially of 22-27 weight percent nickel, 18-22 weight percent chromium, 9-15 weight percent aluminum, 0.0005-0.05 weight percent yttrium, with the balance iron.
Claim 13
Dependent Claim
20 words
The seal of claim 9 where the alloy includes an aluminum rich phase which is uniformly dispersed throughout the alloy.
Claim 14
Dependent Claim
25 words
The seal of claim 10 where the aluminum rich phase is formed by holding the alloy at a temperature ranging between 2100° and 2200° F.
Claim 15
Dependent Claim
9 words
The seal of claim 11 made principally of fibers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |