US4327155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated metal structures and method for making
Assignee: General Electric Co
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Filing: 1980-12-29
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Granted: 1982-04-27
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Expires: 2000-12-29
Abstract
Abstract Dual coated erosion resistant metal or ceramic structures are provided having an interior adherent indicating metallic or ceramic layer containing a UV sensitive phosphor and an exterior ceramic or metallic protective coating. A method of making such dual coated structures also is provided involving the plasma or flame spraying of blends of particulated metal powder or metal oxide powder and a metal oxide UV sensitive phosphor onto the surface of the metal or ceramic structure.
Inventors
- 👤 Rodney E. Hanneman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:37
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7783; C09K11/7792; C23C4/06; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/937; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12069; Y10T428/12076; Y10T428/12083; Y10T428/1209; Y10T428/12139; Y10T428/12493; Y10T428/1266; Y10T428/12771; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
128 words
In the method of periodically applying a protective metallic or ceramic coating on the surface of a substrate subject to surface erosion, corrosion or wear when in use, by plasma or flame spraying the substrate surface with powdered metal or a powdered metal oxide blend whereby it is difficult to determine after a particular service period whether additional surface spraying is required, the improvement which comprises, plasma or flame spraying the substrate with a mixture of metal powder, or metal oxide powder having an effective amount of a UV sensitive phosphor to produce a UV sensitive metallic or ceramic indicating coating for signaling, upon exposure to U.V. radiation, when additional plasma or flame spraying of the metal substrate with powdered metal or powdered metal oxide should be undertaken.
Claim 2
Dependent Claim
128 words
In the method of periodically applying a protective metallic or ceramic coating on the surface of a substrate subject to surface erosion, corrosion or wear when in use, by plasma or flame spraying the substrate surface with powdered metal or a powdered metal oxide blend whereby it is difficult to determine after a particular service period whether additional surface spraying is required, the improvement which comprises, plasma or flame spraying the substrate with a mixture of metal powder, or metal oxide powder having an effective amount of a UV sensitive phosphor to produce a UV sensitive metallic or ceramic indicating coating for signaling, upon exposure to U.V. radiation, when additional plasma or flame spraying of the metal substrate with powdered metal or powdered metal oxide should be undertaken.
Claim 3
Dependent Claim
14 words
A method in accordance with claim 1, where the plasma sprayed substrate is steel.
Claim 4
Dependent Claim
24 words
A method in accordance with claim 1, where a mixture of metal powder and UV sensitive metal oxide phosphor is plasma or flame sprayed.
Claim 5
Dependent Claim
25 words
A method in accordance with claim 1, where a mixture of metal oxide powder and UV sensitive metal oxide phosphor is plasma or flame sprayed.
Claim 6
Dependent Claim
21 words
A method in accordance with claim 1, where UV sensitive phosphor is, Ce.sub.1--X--Y La.sub.X Tb.sub.Y MgAl.sub.11 O.sub.19, where O<X<0.2 and 0.2<Y<0.4.
Claim 7
Dependent Claim
23 words
A method in accordance with claim 1, where UV sensitive phosphor is Ce 0 .7 Tb 0 .3 MgAl 11 O 19 .
Claim 8
Dependent Claim
19 words
A method in accordance with claim 5, where UV sensitive phosphor is cerium magnesium aluminate doped with +3 terbium.
Claim 9
Dependent Claim
17 words
A method in accordance with claim 3, where UV sensitive phosphor is yttrium doped with +3 europium.
Claim 10
Dependent Claim
24 words
A coated metallic article having an inner metallic coating of metal and an effective amount of a UV sensitive phosphor, and outer metallic coating.
Claim 11
Dependent Claim
24 words
A coated metallic article having an inner metallic coating of metal and an effective amount of a UV sensitive phosphor, and outer metallic coating.
Claim 12
Dependent Claim
24 words
A coated metallic article having an inner metallic coating of metal and an effective amount of a UV sensitive phosphor and outer ceramic coating.
Claim 13
Dependent Claim
24 words
A coated metallic article having an inner metallic coating of metal and an effective amount of a UV sensitive phosphor and outer ceramic coating.
Claim 14
Dependent Claim
26 words
A coated metallic article having an inner ceramic coating of metal oxide and an effective amount of a UV sensitive phosphor and an outer metallic coating.
Claim 15
Dependent Claim
26 words
A coated metallic article having an inner ceramic coating of metal oxide and an effective amount of a UV sensitive phosphor and an outer metallic coating.
Claim 16
Dependent Claim
27 words
A coated metallic article having an inner ceramic coating of a metal oxide and an effective amount of a UV sensitive phosphor and an outer ceramic coating.
Claim 17
Dependent Claim
27 words
A coated metallic article having an inner ceramic coating of a metal oxide and an effective amount of a UV sensitive phosphor and an outer ceramic coating.
Claim 18
Dependent Claim
26 words
A coated metallic article in accordance with claim 3, where the UV sensitive phosphor is Ce 0 .7 Tb 0 .3 MgAl 11 O 19 .
Claim 19
Dependent Claim
22 words
A coated metallic article in accordance with claim 1, where the inner and outer metallic coating is plasma or flame sprayed 450Ni.
Claim 20
Dependent Claim
9 words
A coated ceramic article in accordance with claim 1.
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) | 1985-04-26 | 1985-10-26 | 1986-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-26 | 1989-10-26 | 1990-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-26 | 1993-10-26 | 1994-04-27 | $7700.00 | Window Closed / Lapsed |