Patent EP0086938A2 successfully refreshed from Google Patents.
EP0086938A2
Expired / Lapsed
EP
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Hollow sphere ceramic particles for abradable coatings
Assignee: Applied Biosystems Inc
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Filing: 1983-01-12
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Granted: —
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Expires: 2003-01-12
Abstract
Abstract A hollow sphere ceramic flame spray powder is disclosed. The desired constituents are first formed into agglomerated particles in a spray drier. Then the agglomerated particles are introduced into a plasma flame which is adjusted so that the particles collected are substantially hollow. The hollow sphere ceramic particles are suitable for flame spraying a porous and abradable coating.
Inventors
- 👤 Frank N. Longo
- 👤 Nicholas F. Bader Iii
- 👤 Mitchell R. Dorfman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 06:23
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/08; F01D11/12; F01D11/122; C; C23; C23C; C23C4/00; C23C4/04; C23C4/10; C23C4/11; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
21 words
Claim 1. A flame spray powder comprising individual particles of refractory oxide wherein said particles are substantially spherical and substantially hollow.
Claim 2
Dependent Claim
25 words
Claim 2. Flame spray powder according to Claim 1 in which said powder has an apparent density of about 15% to 50% of theoretical density.
Claim 3
Dependent Claim
28 words
Claim 3. Flame spray powder according to Claim 1 in which said refractory oxide comprises a member selected from the group consisting of zirconium oxide and magnesium zirconate.
Claim 4
Dependent Claim
34 words
Claim 4. The flame spray powder of Claim 1 wherein said refractory oxide comprises a member selected from the group of zirconium oxide, magnesium oxide, hafnium oxide, cerium oxide, yttrium oxide and combinations thereof.
Claim 5
Dependent Claim
30 words
Claim 5. Flame spray powder according to Claims 2, 3 or 4 in which said particles have a size between about -100 mesh, U.S. standard screen size, and +5 microns.
Claim 6
Dependent Claim
30 words
Claim 6. Flame spray powder according to Claims 2, 3 or 4 in which said particles have a size between about -120 mesh and +325 mesh U.S. standard screen sizes.
Claim 7
Dependent Claim
24 words
Claim 7. A process for producing a porous coating comprising flame spraying refractory oxide flame spray particles which are substantially spherical and substantially hollow.
Claim 8
Dependent Claim
24 words
Claim 8. A process according to Claim 7 in which said particles have an apparent density of approximately 15% to 50% of theoretical density.
Claim 9
Dependent Claim
23 words
Claim 9. A process according to Claim 7 or 8 in which said flame spraying is effected with a plasma flame spray gun.
Claim 10
Dependent Claim
28 words
Claim 10. The flame spray powder of flair I additionally including a flame spray powder of substantially solid particles blended with said substantially spherical and substantially hollow particles.
Claim 11
Dependent Claim
28 words
Claim 11. The flame spray powder of Claim 10 wherein said substantially spherical and substantially hollow particles are present in at least 10% by weight of said blend.
Claim 12
Dependent Claim
28 words
Claim 12. The flame spray powder of Claim 10 wherein said substantially spherical and substantially hollow particles are present in at least 40% by weight of said blend.
References Cited (Backward Citations)
No citation records indexed.
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