WO2005012598A1 - Verfahren zum reparieren von wärmedämmschichten mit lokalen beschädigungen - Google Patents
Verfahren zum reparieren von wärmedämmschichten mit lokalen beschädigungen Download PDFInfo
- Publication number
- WO2005012598A1 WO2005012598A1 PCT/DE2004/001637 DE2004001637W WO2005012598A1 WO 2005012598 A1 WO2005012598 A1 WO 2005012598A1 DE 2004001637 W DE2004001637 W DE 2004001637W WO 2005012598 A1 WO2005012598 A1 WO 2005012598A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- thermal barrier
- barrier coating
- local damage
- electrophoresis
- insulation layer
- Prior art date
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
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04762487A EP1654402A1 (de) | 2003-08-01 | 2004-07-22 | Verfahren zum reparieren von wärmedämmschichten mit lokalen beschädigungen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10335406A DE10335406A1 (de) | 2003-08-01 | 2003-08-01 | Verfahren zum Reparieren von Wärmedämmschichten mit lokalen Beschädigungen |
DE10335406.9 | 2003-08-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005012598A1 true WO2005012598A1 (de) | 2005-02-10 |
Family
ID=34072031
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2004/001637 WO2005012598A1 (de) | 2003-08-01 | 2004-07-22 | Verfahren zum reparieren von wärmedämmschichten mit lokalen beschädigungen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1654402A1 (de) |
DE (1) | DE10335406A1 (de) |
WO (1) | WO2005012598A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3789518B1 (de) * | 2014-01-29 | 2023-11-29 | Safran Aircraft Engines | Verfahren zur lokalisierten reparatur einer beschädigten wärmesperre |
DE102014212134A1 (de) * | 2014-06-25 | 2015-12-31 | Siemens Aktiengesellschaft | Keramische Beschichtung eines metallischen Körpers, Verfahren und Verwendung des Verfahrens dazu |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1576309A (de) * | 1967-08-18 | 1969-07-25 | ||
JPH06116783A (ja) * | 1991-08-09 | 1994-04-26 | Permelec Electrode Ltd | クロムメッキ方法 |
US5336382A (en) * | 1991-10-09 | 1994-08-09 | Societe Sochata | Process for the electrophoretic deposition of metal powder for the recoating of a part by diffusion brazing, and electrophoresis bath for use therein |
DE19935337A1 (de) * | 1999-07-28 | 2001-02-01 | Volkswagen Ag | Verfahren zum partiellen Beschichten bereits mit einem elektrisch leitfähigen Lack beschichteter metallischer Werkstücke |
WO2002097162A1 (en) * | 2001-05-29 | 2002-12-05 | Mcgill University | Thermal barrier coatings and fabrication of same using electrochemical methods |
FR2827311A1 (fr) * | 2001-07-12 | 2003-01-17 | Snecma Moteurs | Procede de reparation locale de pieces revetues d'une barriere thermique |
-
2003
- 2003-08-01 DE DE10335406A patent/DE10335406A1/de not_active Withdrawn
-
2004
- 2004-07-22 EP EP04762487A patent/EP1654402A1/de not_active Withdrawn
- 2004-07-22 WO PCT/DE2004/001637 patent/WO2005012598A1/de not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1576309A (de) * | 1967-08-18 | 1969-07-25 | ||
JPH06116783A (ja) * | 1991-08-09 | 1994-04-26 | Permelec Electrode Ltd | クロムメッキ方法 |
US5336382A (en) * | 1991-10-09 | 1994-08-09 | Societe Sochata | Process for the electrophoretic deposition of metal powder for the recoating of a part by diffusion brazing, and electrophoresis bath for use therein |
DE19935337A1 (de) * | 1999-07-28 | 2001-02-01 | Volkswagen Ag | Verfahren zum partiellen Beschichten bereits mit einem elektrisch leitfähigen Lack beschichteter metallischer Werkstücke |
WO2002097162A1 (en) * | 2001-05-29 | 2002-12-05 | Mcgill University | Thermal barrier coatings and fabrication of same using electrochemical methods |
FR2827311A1 (fr) * | 2001-07-12 | 2003-01-17 | Snecma Moteurs | Procede de reparation locale de pieces revetues d'une barriere thermique |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 0184, no. 01 (C - 1231) 27 July 1994 (1994-07-27) * |
Also Published As
Publication number | Publication date |
---|---|
EP1654402A1 (de) | 2006-05-10 |
DE10335406A1 (de) | 2005-02-17 |
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