US4675205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treatment of a part and use of this treatment for improving the adhesion of a coating which is then deposited on the part, particularly by hot spraying
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1985-03-08
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Granted: 1987-06-23
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Expires: 2005-03-08
Abstract
Abstract PCT No. PCT/FR85/00047 Sec. 371 Date Oct. 30, 1985 Sec. 102(e) Date Oct. 30, 1985 PCT Filed Mar. 8, 1985 PCT Pub. No. WO85/04121 PCT Pub. Date Sep. 26, 1985.A process for the surface treatment of a part wherein it comprises subjecting the surface of said part in an inert atmosphere to the action of a hot gaseous arc plasma, and followed by the immediate cooling of the thus treated surface by projecting on to the same a cooling liquid at a temperature close to its saturation point which is a temperature whose variation from the saturation temperature does not exceed 15 DEG C.
Inventors
- 👤 Marcel Boncoeur
- 👤 Bernard Hansz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:31
CPC Classifications
B; B05; B05D; B05D3/00; B05D3/002; B05D3/04; B05D3/0466; B05D3/048; B05D3/14; B05D3/141; B05D3/142; B05D3/144; B29; B29C; B29C59/00; B29C59/14; B29C59/142; C; C23; C23C; C23C4/00; C23C4/02; C23C4/18; B05D2201/00; B05D2201/02; B29C37/00; B29C2037/90; B29C35/00; B29C35/16; B29K; B29K2105/00; B29K2105/06
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
73 words
A process for the surface treatment of a part wherein it comprises subjecting the surface of said part in an inert atmosphere to the action of a hot gaseous arc plasma, and followed by the immediate cooling of the thus treated surface by projecting on to the same a cooling liquid at a temperature close to its saturation point which is a temperature whose variation from the saturation temperature does not exceed 15°C.
Claim 2
Dependent Claim
73 words
A process for the surface treatment of a part wherein it comprises subjecting the surface of said part in an inert atmosphere to the action of a hot gaseous arc plasma, and followed by the immediate cooling of the thus treated surface by projecting on to the same a cooling liquid at a temperature close to its saturation point which is a temperature whose variation from the saturation temperature does not exceed 15°C.
Claim 3
Dependent Claim
21 words
A process according to claim 1, wherein the gas of the plasma is nitrogen, argon, hydrogen, helium or a mixture thereof.
Claim 4
Dependent Claim
18 words
A process according to either of the claims 1 and 2, wherein the plasma comprises a reactive gas.
Claim 5
Dependent Claim
17 words
A process according to claim 3, wherein the reactive gas is water vapour or BCl 3 .
Claim 6
Dependent Claim
93 words
A process for the preparation of a part coated by the hot spraying of a coating material, wherein on to the surface of the part to be coated is firstly deposited a thermoplastic material layer, wherein the thus deposited thermoplastic material layer then undergoes a surface treatment by performing the process according to one of the claims 1 to 4, wherein the coating material is then sprayed hot on to the surface of the part provided with the thus treated layer, wherein the surface of the thus treated part is then immediately cooled.
Claim 7
Dependent Claim
31 words
Process according to claim 5, wherein the surface of the thus treated part is cooled by spraying on to it a cooling liquid at a temperature close to its saturation point.
Claim 8
Dependent Claim
19 words
A process according to claim 5, wherein the thermoplastic material layer has a thickness of 20 to 500 μm.
Claim 9
Dependent Claim
21 words
A process according to claim 5, wherein the thermoplastic material is chosen from the group including polystyrene, polycarbonates, polyethers and polyolefins.
Claim 10
Dependent Claim
19 words
A process according to either one of the claims 1 to 5, wherein the part is a composite material.
Claim 11
Dependent Claim
18 words
A process according to claim 9, wherein the composite material is a plastic material reinforced by inorganic fibres.
Claim 12
Dependent Claim
17 words
A process according to claim 10, wherein the inorganic fibres, are glass, carbon, silica or graphite fibres.
Claim 13
Dependent Claim
18 words
A process according to claim 9, wherein the composite material is an epoxy resin reinforced by glass fibres.
Claim 14
Dependent Claim
23 words
Process according to claim 5, wherein the coating material is a refractory material chosen from among the oxides, carbides, silicides, nitrides and borides.
Claim 15
Dependent Claim
43 words
A process according to claim 5, wherein the thermoplastic material layer is deposited by spraying on to the surface of the part a solution of the thermoplastic material in a solvent and by then drying the thus deposited layer to eliminate the solvent.
Claim 16
Dependent Claim
20 words
A process according to either one of the claims 1 and 6, wherein the cooling liquid is a liquefied gas.
Claim 17
Dependent Claim
19 words
A process according to claim 15, wherein the liquefied gas is chosen from the group including nitrogen and argon.
Claim 18
Dependent Claim
28 words
A process according to either one of the claims 1 and 6, wherein the cooling liquid is sprayed in and droplet form by means of a carrier gas.
Claim 19
Dependent Claim
30 words
A process according to either one of the claims 1 and 5, wherein the part undergoes a cleaning treatment before subjecting it to the action of the gaseous arc plasma.
Claim 20
Dependent Claim
15 words
A process according to claim 18, wherein the cleaning treatment comprises degreasing and/or sand blasting.
Claim 21
Dependent Claim
15 words
A process according to claim 19, wherein degreasing is performed by means of an alcohol.
Claim 22
Dependent Claim
20 words
A process according to claim 19, wherein sand blasting is carried out by projecting corundum particles on to the part.
Claim 23
Dependent Claim
23 words
A process according to either one of the claims 1 and 5, wherein the gaseous plasma is a plasma of argon and nitrogen.
Claim 24
Dependent Claim
49 words
A process for the coating of a composite material part with a ceramic material wherein it consists of subjecting the surface of the part to a surface treatment process according to any one of the claims 1 to 4, and then spraying on to the same a ceramic material.
References Cited (Backward Citations)
No citation records indexed.
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