US3879831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickle base high temperature abradable material
Assignee: RTX Corp
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Filing: 1973-07-25
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Granted: 1975-04-29
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Expires: 1993-07-25
Abstract
Abstract A homogeneous and porous abradable seal material structure comprising principally gamma , gamma '' and/or Beta phases for use in elevated temperature operating apparatus consisting essentially of, by weight, 60-80% Ni, 2-12% Cr, 1-10% Co, 4-20% Al, up to 3% of a refractory metal selected from the group consisting of yttrium, hafnium and lanthanum and 3-15% inert powder material selected from the group consisting of diatomaceous earth (D.E.), boron nitride, silicon glass, mica, vermiculite asbestos, molybdenum disulfide, graphite, cobalt oxide, cerium oxide and zinc oxide.
Inventors
- 👤 David V Rigney
- 👤 Peter W Schilke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:48
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0089; F; F01; F01D; F01D11/00; F01D11/08; F01D11/12; F01D11/122; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/939; Y10S277/94
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
81 words
A HOMOGENEOUS AND POROUS ABRADABLE SEAL STRUCTURE CONSISTING PRINCIPALLY OF Y, Y'' AND B PHASES FOR USE IN ELEVATED TEMPERATURE APPARATUS CONSISTING ESSENTILLY OF, BY WEIGHT, 60-80% NI, 2-12% CR, 1-10% CO, 4-20% AL, UP TO 3% OF A REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF YTTRIUM, HAFNIUM AND LANTHANUM AND 3-15% INERT POWDER MATERIAL SELECTED FROM THE GROUP CONSISTING OF DIATOMACEOUS EARTH, BORON NITRID3, SILICON GLASS, MICA, VERMICULITE ASBESTOS, MOLYBDENUM DISULFIDE, GRAPHITE, COBALT OXIDE, CERIUM OXIDE AND ZINC OXIDE.
Claim 2
Dependent Claim
81 words
A HOMOGENEOUS AND POROUS ABRADABLE SEAL STRUCTURE CONSISTING PRINCIPALLY OF Y, Y'' AND B PHASES FOR USE IN ELEVATED TEMPERATURE APPARATUS CONSISTING ESSENTILLY OF, BY WEIGHT, 60-80% NI, 2-12% CR, 1-10% CO, 4-20% AL, UP TO 3% OF A REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF YTTRIUM, HAFNIUM AND LANTHANUM AND 3-15% INERT POWDER MATERIAL SELECTED FROM THE GROUP CONSISTING OF DIATOMACEOUS EARTH, BORON NITRID3, SILICON GLASS, MICA, VERMICULITE ASBESTOS, MOLYBDENUM DISULFIDE, GRAPHITE, COBALT OXIDE, CERIUM OXIDE AND ZINC OXIDE.
Claim 3
Dependent Claim
15 words
The invention of claim 1 wherein said structure has a total porosity of approximately 35-65%.
Claim 4
Dependent Claim
84 words
A homogeneous and porous abradable seal structure consisting principally of gamma , gamma '' and Beta phases for use in elevated temperature operating apparatus consisting essentially of, by weight, 65-75% Ni, 3-9% Cr, 4-8% Co, 7-18% Al, up to 1.0% of a refractory metal selected from the group consisting of yttrium, hafnium and lanthanum and 5-10% inert powder material selected from the group consisting of diatomaceous earth, boron nitride, silicon glass, mica, vermiculite asbestos, molybdenum disulfide, graphite, cobalt oxide, cerium oxide and zinc oxide.
Claim 5
Dependent Claim
84 words
A homogeneous and porous abradable seal structure consisting principally of gamma , gamma '' and Beta phases for use in elevated temperature operating apparatus consisting essentially of, by weight, 65-75% Ni, 3-9% Cr, 4-8% Co, 7-18% Al, up to 1.0% of a refractory metal selected from the group consisting of yttrium, hafnium and lanthanum and 5-10% inert powder material selected from the group consisting of diatomaceous earth, boron nitride, silicon glass, mica, vermiculite asbestos, molybdenum disulfide, graphite, cobalt oxide, cerium oxide and zinc oxide.
Claim 6
Dependent Claim
15 words
The invention of claim 3 wherein said structure has a total porosity of approximately 35-65%.
Claim 7
Dependent Claim
44 words
A homogeneous and porous abradable seal material structure consisting principally of gamma , gamma '' and Beta phases for use in elevated temperature apparatus consisting essentially of approximately, by weight, 70.9% Ni, 4.4% Cr, 6.0% Co, 10.4% Al, 0.10% Y and 8.3% diatomaceous earth.
Claim 8
Dependent Claim
44 words
A homogeneous and porous abradable seal material structure consisting principally of gamma , gamma '' and Beta phases for use in elevated temperature apparatus consisting essentially of approximately, by weight, 70.9% Ni, 4.4% Cr, 6.0% Co, 10.4% Al, 0.10% Y and 8.3% diatomaceous earth.
Claim 9
Dependent Claim
15 words
The invention of claim 5 wherein said structure has a total porosity of approximately 35-65%.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |