EP1654402A1 - Method for repairing heat-insulating layers with local damages - Google Patents
Method for repairing heat-insulating layers with local damagesInfo
- Publication number
- EP1654402A1 EP1654402A1 EP04762487A EP04762487A EP1654402A1 EP 1654402 A1 EP1654402 A1 EP 1654402A1 EP 04762487 A EP04762487 A EP 04762487A EP 04762487 A EP04762487 A EP 04762487A EP 1654402 A1 EP1654402 A1 EP 1654402A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thermal barrier
- barrier coating
- local damage
- electrophoresis
- insulation layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/20—Pretreatment
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/02—Electrophoretic coating characterised by the process with inorganic material
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/22—Servicing or operating apparatus or multistep processes
Definitions
- the invention relates to a method for repairing thermal barrier coatings with local damage according to the preamble of claim 1.
- a known method for repairing thermal barrier coatings with local damage present on the surface of the thermal barrier coating is described in EP 1 197 585 A2.
- a ceramic paste is applied, the ceramic paste is thereby introduced in particular in the local damage.
- the ceramic paste is a mixture of ceramic powder, a ceramic binder and a solvent.
- a so-called ceramic repair layer is formed, wherein the ceramic binder forms a matrix in which the particles of the ceramic powder are embedded.
- a disadvantage of this method is that the joints of the ceramic repair layer with the original W irmmed Mrs has insufficient stability.
- the local damage on the surface of the thermal insulation layer is filled by means of electrophoretic deposition of thermal barrier coating material.
- the damaged area which is also referred to as cavitation
- the surface of the thermal barrier coating is advantageous by means of electrolysis, wherein the substrate coated with the thermal barrier coating has a positive polarity. is conditioned with reactive oxygen, also referred to as nascent oxygen conditioned.
- the polarity is reversed, i.
- the coated with the thermal barrier coating substrate is placed on negative potential.
- the cavitation pretreated by means of the electrochemical process is then filled up with thermal insulation layer material. Due to the field profile of the applied electric field only the cavitation is filled with a high green density.
- the thermal barrier coating material is present as a powder suspension for electrophoresis, wherein it advantageously contains nanoscale particles.
- the thermal barrier coating material e.g. Yttrium partially stabilized zirconia (YSZ), lanthanum magnesium hexaaluminate, or a mixture thereof.
- An advantage of the method according to the invention is that the electrophoresis in cavitation builds up a structure comparable to the undamaged thermal barrier coating. This increases the stability of the repaired component.
- Another advantage is that with the method according to the invention, the final sintering process can take place at low temperatures below 1000 ° C.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Paints Or Removers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10335406A DE10335406A1 (en) | 2003-08-01 | 2003-08-01 | Method of repairing thermal barrier coatings with local damage |
PCT/DE2004/001637 WO2005012598A1 (en) | 2003-08-01 | 2004-07-22 | Method for repairing heat-insulating layers with local damages |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1654402A1 true EP1654402A1 (en) | 2006-05-10 |
Family
ID=34072031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04762487A Withdrawn EP1654402A1 (en) | 2003-08-01 | 2004-07-22 | Method for repairing heat-insulating layers with local damages |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1654402A1 (en) |
DE (1) | DE10335406A1 (en) |
WO (1) | WO2005012598A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2678347C2 (en) * | 2014-01-29 | 2019-01-28 | Сафран Эркрафт Энджинз | Process for localised repair of damaged thermal barrier |
DE102014212134A1 (en) * | 2014-06-25 | 2015-12-31 | Siemens Aktiengesellschaft | Ceramic coating of a metallic body, method and use of the method thereto |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1769974A1 (en) * | 1967-08-18 | 1971-10-21 | Westinghouse Electric Corp | Coating compound for electrophoretic coating |
JPH06116783A (en) * | 1991-08-09 | 1994-04-26 | Permelec Electrode Ltd | Chrome plating method |
FR2682401B1 (en) * | 1991-10-09 | 1993-11-26 | Sochata | METHOD FOR THE ELECTROPHORETIC DEPOSITION OF METAL POWDER FOR RECHARGING OF PARTS BY DIFFUSION BRAZING AND BATH USED. |
DE19935337A1 (en) * | 1999-07-28 | 2001-02-01 | Volkswagen Ag | Partially coating metallic workpieces comprises completely or partially removing the lacquer in the regions to be coated, and subjecting the workpiece to a cathodic electro-dip lacquering on the regions to be coated |
WO2002097162A1 (en) * | 2001-05-29 | 2002-12-05 | Mcgill University | Thermal barrier coatings and fabrication of same using electrochemical methods |
FR2827311B1 (en) * | 2001-07-12 | 2003-09-19 | Snecma Moteurs | PROCESS FOR LOCAL REPAIR OF PARTS COATED WITH A THERMAL BARRIER |
-
2003
- 2003-08-01 DE DE10335406A patent/DE10335406A1/en not_active Withdrawn
-
2004
- 2004-07-22 EP EP04762487A patent/EP1654402A1/en not_active Withdrawn
- 2004-07-22 WO PCT/DE2004/001637 patent/WO2005012598A1/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2005012598A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10335406A1 (en) | 2005-02-17 |
WO2005012598A1 (en) | 2005-02-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20060209 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR |
|
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DAIMLERCHRYSLER AG Owner name: MTU AERO ENGINES GMBH |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DAIMLER AG Owner name: MTU AERO ENGINES GMBH |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20080201 |