Patent US4996117A successfully refreshed from Google Patents.
US4996117A
Expired / Lapsed
US
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High temperature protective coating
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1989-09-25
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Granted: 1991-02-26
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Expires: 2009-09-25
Abstract
Abstract A high-temperature protective coating comprising a ceramic material, in particular for structural components of super-alloys, characterized in that at least one oxide of a metal of subcolumn 4 of the periodic table of elements is stabilized with at least one further oxide of a metal and is enveloped in a corrosion-resistant manner, at least in some regions, by at least one ceramic material.
Inventors
- 👤 Wing F. Chu
- 👤 Franz J. Rohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:25
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/10; C23C4/11; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12597; Y10T428/12611; Y10T428/12618; Y10T428/12771; Y10T428/12861; Y10T428/12931
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
A structural component consisting essentially of a super alloy having a high temperature protective coating, said coating, essentially consists of a ceramic material of 93-42 mole % of the oxide of zirconium, mixed with 2-8 mole % of yttrium oxide, for forming a stabilized zirconium oxide crystal combination, said combination, additionally being mixed with 5-50 mole % of zirconium silicate, said mixture being ground and sintered at a temperature between 1450° C. and 1500° C. to form a corrosion-resistant envelope around the stabilized zirconium oxide crystals and coated onto said super alloy substrate.
Claim 2
Dependent Claim
93 words
A structural component consisting essentially of a super alloy having a high temperature protective coating, said coating, essentially consists of a ceramic material of 93-42 mole % of the oxide of zirconium, mixed with 2-8 mole % of yttrium oxide, for forming a stabilized zirconium oxide crystal combination, said combination, additionally being mixed with 5-50 mole % of zirconium silicate, said mixture being ground and sintered at a temperature between 1450° C. and 1500° C. to form a corrosion-resistant envelope around the stabilized zirconium oxide crystals and coated onto said super alloy substrate.
Claim 3
Dependent Claim
87 words
A structural component consisting essentially of a super alloy having a high temperature protective coating, essentially consisting of 92-40 mole % of the oxide of zirconium, mixed with 3-10 mole % of magnesium oxide for forming a stabilized zirconium oxide crystal combination, said combination additionally being mixed with 5-50 mole % of zirconium silicate, said mixture being ground and sintered at a temperature between 1450° C. and 1500° C. to form a corrosion-resistant envelope around the stabilized zirconium oxide crystals and coated onto said super alloy substrate.
Claim 4
Dependent Claim
87 words
A structural component consisting essentially of a super alloy having a high temperature protective coating, essentially consisting of 92-40 mole % of the oxide of zirconium, mixed with 3-10 mole % of magnesium oxide for forming a stabilized zirconium oxide crystal combination, said combination additionally being mixed with 5-50 mole % of zirconium silicate, said mixture being ground and sintered at a temperature between 1450° C. and 1500° C. to form a corrosion-resistant envelope around the stabilized zirconium oxide crystals and coated onto said super alloy substrate.
Claim 5
Dependent Claim
128 words
A structural component consisting essentially of a super alloy having a high temperature protective coating, essentially consisting of 93-62 mole % of the oxide of zirconium, mixed with 2-8 mole % of yttrium oxide for forming a stabilized zirconium oxide and yttrium oxide combination, said combination being additionally mixed with an amount of an aluminum titanate, wherein the amount of Al 2 O 3 is between 3 and 18 mole % and the amount of TiO 2 is between 2 and 12 mole %, and being sufficient to impart corrosion-resistance to said combination, said mixture being ground and sintered at a temperature between 1450° C. and 1500° C. to form a corrosion-resistant aluminum titanate envelope around the stabilized zirconium oxide combination and coated onto said super alloy substrate.
Claim 6
Dependent Claim
128 words
A structural component consisting essentially of a super alloy having a high temperature protective coating, essentially consisting of 93-62 mole % of the oxide of zirconium, mixed with 2-8 mole % of yttrium oxide for forming a stabilized zirconium oxide and yttrium oxide combination, said combination being additionally mixed with an amount of an aluminum titanate, wherein the amount of Al 2 O 3 is between 3 and 18 mole % and the amount of TiO 2 is between 2 and 12 mole %, and being sufficient to impart corrosion-resistance to said combination, said mixture being ground and sintered at a temperature between 1450° C. and 1500° C. to form a corrosion-resistant aluminum titanate envelope around the stabilized zirconium oxide combination and coated onto said super alloy substrate.
Claim 7
Dependent Claim
129 words
A structural component consisting essentially of a super alloy having a high temperature protective coating, essentially consisting of a ceramic material of 92-55 mole % zirconium oxide, mixed with 3-15 mole % of magnesium oxide, for forming a stabilized zirconium oxide and magnesium oxide combination, said combination being additionally mixed with an amount of corrosion-resistant aluminum titanate, wherein the amount of Al 2 O 3 is between 3 and 18 mole % and the amount of TiO 2 is between 2 and 12 mole %, and being sufficient to impart corrosion resistance to said combination said mixture being ground and sintered at a temperature between 1450° C. and 1500° C. to form a corrosion-resistant envelope substantially surrounding said stabilized zirconium oxide combination and coated onto said super alloy substrate.
Claim 8
Dependent Claim
129 words
A structural component consisting essentially of a super alloy having a high temperature protective coating, essentially consisting of a ceramic material of 92-55 mole % zirconium oxide, mixed with 3-15 mole % of magnesium oxide, for forming a stabilized zirconium oxide and magnesium oxide combination, said combination being additionally mixed with an amount of corrosion-resistant aluminum titanate, wherein the amount of Al 2 O 3 is between 3 and 18 mole % and the amount of TiO 2 is between 2 and 12 mole %, and being sufficient to impart corrosion resistance to said combination said mixture being ground and sintered at a temperature between 1450° C. and 1500° C. to form a corrosion-resistant envelope substantially surrounding said stabilized zirconium oxide combination and coated onto said super alloy substrate.
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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) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |