WO2018206220A1 - Ceramic surface, cmc component and production method - Google Patents

Ceramic surface, cmc component and production method Download PDF

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Publication number
WO2018206220A1
WO2018206220A1 PCT/EP2018/059428 EP2018059428W WO2018206220A1 WO 2018206220 A1 WO2018206220 A1 WO 2018206220A1 EP 2018059428 W EP2018059428 W EP 2018059428W WO 2018206220 A1 WO2018206220 A1 WO 2018206220A1
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WO
WIPO (PCT)
Prior art keywords
ceramic
cmc
webs
ceramic surface
component
Prior art date
Application number
PCT/EP2018/059428
Other languages
German (de)
French (fr)
Inventor
Thomas Beck
Jens Dietrich
Peter Stuart Hollingsworth
Sven Kreuziger
Original Assignee
Siemens Aktiengesellschaft
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Publication of WO2018206220A1 publication Critical patent/WO2018206220A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/0072—Heat treatment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
    • C04B41/5042—Zirconium oxides or zirconates; Hafnium oxides or hafnates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/87—Ceramics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/28—Selecting particular materials; Particular measures relating thereto; Measures against erosion or corrosion
    • F01D5/288—Protective coatings for blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/603—Composites; e.g. fibre-reinforced
    • F05D2300/6033—Ceramic matrix composites [CMC]

Definitions

  • the invention relates to a ceramic surface, CMC ⁇ part and method for production.
  • CMC components (ceramic matrix composite) have a Kerami ⁇ specific matrix with embedded ceramic fibers which result in the mechanical strength. Silicon carbide ceramics with silicon carbide fibers are known. CMC components consist of several CMC bearings.
  • Such components are often used in the construction of turbines such as steam turbines, gas turbines or aircraft generating engines due to the temperature resistance.
  • the task is to achieve a good connection of the TBC to the CMC substrate.
  • the topmost CMC layer is processed by a pico-laser to achieve an improved microstructure.
  • the remelting of the topmost CMC layer leads to improved strength.
  • the first CMC location as well as provides one improved surface structure for the application of a ceramic TBC.
  • the front part ⁇ adhesive is on top for the connection of a ceramic layer also.
  • the main advantage of this idea is to improve the coatability of CMC surfaces and to improve the strength of the first CMC layer.
  • the reformation of the CMC surface makes it possible to avoid other mechanical overexcesses such as sandblasting, which often leads to damage.
  • the remelting of the first CMC layer leads to a higher strength of the CMC per se and to an improved connection of a TBC.
  • Such CMCs can be used as blade material, which can then be used for turbines with higher inlet temperatures and thus higher turbine efficiency.
  • FIG. 1 shows a rough ceramic surface 1, which has been produced by remelting a ceramic, in particular a ceramic CMC x s.
  • FIG. 2 shows a structured surface 1 which has intersecting webs 4, 7.
  • the intersecting webs 4, 7 were created in particular by removing material in the region between the webs 4, 7.
  • the material is preferably removed by a laser, insbeson ⁇ particular by a Pico-lasers, in particular gleichzei ⁇ by TIG remelting.
  • the enclosed recess 10 between the intersecting webs 4, 7 may be triangular, square, rectangular or any other shape.
  • the webs 4, 7 also need not always be the same thickness or the structuring need not extend over the entire surface 1.
  • the recess 10 between the webs 4, 7 still be processed by having an additional roughness such as a cauliflower-like surface, in particular ⁇ special by remelting.
  • the topmost CMC layer is processed by a pico-laser to achieve an improved microstructure.
  • the melting of the upper CMC layer leads to an improved strength.
  • the first CMC-location and also represents an improved surface structure for the application of a ceramic TBC.
  • the front part ⁇ adhesive is on top for the connection of a ceramic layer also.
  • the main advantage of this idea is to improve the coatability of CMC surfaces and to improve the strength of the first CMC layer.
  • the new formation of the CMC surface makes it possible to avoid other mechanical overexcesses such as sandblasting, which only leads to damage.
  • the remelting of the first CMC layer leads to a higher strength of the CMC per se and to an improved connection of the TBC.
  • Both the formation of webs 4, 7 and the rougher surface between the webs 4, 7 leads to a better adhesion of a following ceramic coating.
  • FIG. 3 shows a further exemplary embodiment, in which recesses 13 have also been introduced on the end faces 16 of the webs 4, 7, or a rough surface has generally been produced.
  • each contact surface having a following Kerami ⁇ deposition coating TBC forms a higher surface roughness.
  • the TBC on the surface 1 has zirconium oxide, partially stabilized or fully stabilized, with or without a ceramic bonding layer.
  • it is applied by HVOF plasma spraying.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

A surface roughness of CMC components is achieved, which serves for better adhesion of ceramic layers, by producing targeted structures by means of webs, which enclose surfaces.

Description

Keramische Oberfläche, CMC-Bauteil und Verfahren zur  Ceramic surface, CMC component and method for
Herstellung  manufacturing
Die Erfindung betrifft eine keramische Oberfläche, CMC-Bau¬ teil und Verfahren zur Herstellung. The invention relates to a ceramic surface, CMC ¬ part and method for production.
CMC-Bauteile (Ceramic Matrix Composits) weisen eine kerami¬ sche Matrix mit darin eingebetteten keramischen Fasern auf, die die mechanische Festigkeit ergeben. Bekannt sind Sili- cium-Karbid-Keramiken mit Silicium-Karbid-Fasern . CMC-Bauteile bestehen aus mehreren CMC-Lagern. CMC components (ceramic matrix composite) have a Kerami ¬ specific matrix with embedded ceramic fibers which result in the mechanical strength. Silicon carbide ceramics with silicon carbide fibers are known. CMC components consist of several CMC bearings.
Solche Bauteile werden aufgrund der Temperaturbeständigkeit oft im Turbinenbau wie Dampfturbinen, Gasturbinen oder Flug zeugtriebwerke eingesetzt. Such components are often used in the construction of turbines such as steam turbines, gas turbines or aircraft generating engines due to the temperature resistance.
Nichtsdestotrotz sollen diese CMC-Komponenten geschützt wer den durch weitere keramische Schichten, was immer eine gute Anbindung der keramischen Schicht (TBC) an das Substrat erfordert . Nonetheless, these CMC components should be protected by further ceramic layers, which always requires a good bonding of the ceramic layer (TBC) to the substrate.
Die Aufgabe besteht darin, eine gute Anbindung der TBC an das CMC-Substrat zu erzielen. The task is to achieve a good connection of the TBC to the CMC substrate.
Die Aufgabe wird gelöst durch eine strukturierte Oberfläche gemäß Anspruch 1. In den Unteransprüchen sind weitere vorteilhafte Maßnahmen aufgelistet, die beliebig miteinander kombiniert werden kön¬ nen, um weitere Vorteile zu erzielen. The object is achieved by a structured surface according to claim 1. In the subclaims further advantageous measures are listed, which are combined with each other Kgs ¬ nen to achieve further advantages.
Zuerst wird die oberste CMC-Lage mittels eines Pico-Lasers bearbeitet, um eine verbesserte Mikrostruktur zu erzielen. First, the topmost CMC layer is processed by a pico-laser to achieve an improved microstructure.
Das Umschmelzen der obersten CMC-Lage führt zu einer verbesserten Festigkeit. Die erste CMC-Lage sowie stellt auch eine verbesserte Oberflächenstruktur für die Anwendung einer keramischen TBC dar. Durch das Umschmelzen wird eine besonders raue, blumenkohlartige Oberfläche erzeugt, die ebenfalls vor¬ teilhaft ist für die Anbindung einer keramischen Schicht obendrauf. The remelting of the topmost CMC layer leads to improved strength. The first CMC location as well as provides one improved surface structure for the application of a ceramic TBC. By the remelting is created a particularly rough, cauliflower-like surface, the front part ¬ adhesive is on top for the connection of a ceramic layer also.
Der Hauptvorteil dieser Idee besteht in der Verbesserung der Beschichtbarkeit von CMC-Oberflächen sowie die Verbesserung der Festigkeit der ersten CMC-Lage. Die Neubildung der CMC- Oberfläche ermöglicht es andere mechanische Ausrauprozesse wie Sandstrahlen zu vermeiden, welches oft zu Schädigungen führt . The main advantage of this idea is to improve the coatability of CMC surfaces and to improve the strength of the first CMC layer. The reformation of the CMC surface makes it possible to avoid other mechanical overexcesses such as sandblasting, which often leads to damage.
Das Umschmelzen der ersten CMC-Lage führt zu einer höheren Festigkeit des CMC an sich und zu einer verbesserten Anbindung einer TBC. The remelting of the first CMC layer leads to a higher strength of the CMC per se and to an improved connection of a TBC.
Solche CMC können als Schaufelmaterial verwendet werden, die dann für Turbinen mit höheren Einlasstemperaturen und damit mit höherer Turbineneffizienz verwendet werden können. Such CMCs can be used as blade material, which can then be used for turbines with higher inlet temperatures and thus higher turbine efficiency.
Es zeigen Figur 1, 2 und 3 Ausführungsbeispiele der Erfin¬ dung . Die Beschreibung und die Figuren stellen nur Ausführungsbeispiele der Erfindung dar. 1, 2 and 3 embodiments of the inven ¬ tion. The description and the figures represent only embodiments of the invention.
Figur 1 zeigt eine raue keramische Oberfläche 1, die durch Umschmelzen einer Keramik, insbesondere eines keramischen CMCxs entstanden ist. FIG. 1 shows a rough ceramic surface 1, which has been produced by remelting a ceramic, in particular a ceramic CMC x s.
Sie hat eine blumenkohlartige Oberfläche 2, also eine frak- tale Oberfläche.  It has a cauliflower-like surface 2, ie a fractal surface.
Diese Rauheit führt zur besseren Anhaftung einer TBC und/oder keramischen Anbindungsschicht . In Figur 2 ist eine strukturierte Oberfläche 1 gezeigt, die sich kreuzende Stege 4, 7 aufweist. This roughness leads to better adhesion of a TBC and / or ceramic bonding layer. FIG. 2 shows a structured surface 1 which has intersecting webs 4, 7.
Die sich kreuzenden Stege 4, 7 entstanden insbesondere dadurch, dass in dem Bereich zwischen den Stegen 4, 7 Material entfernt wurde.  The intersecting webs 4, 7 were created in particular by removing material in the region between the webs 4, 7.
Das Material wird vorzugsweise durch einen Laser, insbeson¬ dere durch einen Pico-Laser entfernt, insbesondere gleichzei¬ tig durch das Umschmelzen. The material is preferably removed by a laser, insbeson ¬ particular by a Pico-lasers, in particular gleichzei ¬ by TIG remelting.
Die umschlossene Vertiefung 10 zwischen den sich kreuzenden Stegen 4, 7 kann dreieckförmig, quadratisch, rechteckig sein oder jede andere Form aufweisen. Somit müssen die Stege 4, 7 auch nicht immer gleich dick sein bzw. die Strukturierung muss sich nicht über die gesamte Oberfläche 1 erstrecken. The enclosed recess 10 between the intersecting webs 4, 7 may be triangular, square, rectangular or any other shape. Thus, the webs 4, 7 also need not always be the same thickness or the structuring need not extend over the entire surface 1.
Weiterhin kann die Vertiefung 10 zwischen den Stegen 4, 7 noch dadurch bearbeitet werden, dass sie eine zusätzliche Rauheit wie eine blumenkohlartige Oberfläche aufweist, insbe¬ sondere durch Umschmelzung . Furthermore, the recess 10 between the webs 4, 7 still be processed by having an additional roughness such as a cauliflower-like surface, in particular ¬ special by remelting.
Zuerst wird die oberste CMC-Lage mittels eines Pico-Lasers bearbeitet, um eine verbesserte Mikrostruktur zu erzielen. First, the topmost CMC layer is processed by a pico-laser to achieve an improved microstructure.
Das Schmelzen der obersten CMC-Lage führt zu einer verbesser- ten Festigkeit. Die erste CMC-Lage sowie stellt auch eine verbesserte Oberflächenstruktur für die Anwendung einer keramischen TBC dar. Durch das Umschmelzen wird eine besonders raue blumenkohlartige Oberfläche erzeugt, die ebenfalls vor¬ teilhaft ist für die Anbindung einer keramischen Schicht obendrauf. The melting of the upper CMC layer leads to an improved strength. The first CMC-location and also represents an improved surface structure for the application of a ceramic TBC. By remelting a particularly rough cauliflower-like surface is produced, the front part ¬ adhesive is on top for the connection of a ceramic layer also.
Der Hauptvorteil dieser Idee besteht in der Verbesserung der Beschichtbarkeit von CMC-Oberflächen sowie die Verbesserung der Festigkeit der ersten CMC-Lage. Die Neubildung der CMC- Oberfläche ermöglicht es andere mechanische Ausrauprozesse wie Sandstrahlen zu vermeiden, welches nur zu Schädigungen führt . Das Umschmelzen der ersten CMC-Lage führt zu einer höheren Festigkeit des CMC an sich und zu einer verbesserten Anbin- dung der TBC . Sowohl die Bildung von Stegen 4, 7 als auch die rauere Oberfläche zwischen den Stegen 4, 7 führt zu einer besseren An- haftung einer folgenden keramischen Beschichtung. The main advantage of this idea is to improve the coatability of CMC surfaces and to improve the strength of the first CMC layer. The new formation of the CMC surface makes it possible to avoid other mechanical overexcesses such as sandblasting, which only leads to damage. The remelting of the first CMC layer leads to a higher strength of the CMC per se and to an improved connection of the TBC. Both the formation of webs 4, 7 and the rougher surface between the webs 4, 7 leads to a better adhesion of a following ceramic coating.
Figur 3 zeigt ein weiteres Ausführungsbeispiel, bei dem auch auf den Stirnseiten 16 der Stege 4, 7 Vertiefungen 13 eingebracht wurden oder allgemein eine raue Oberfläche erzeugt wurde . Somit bildet jede Kontaktfläche mit einer folgenden kerami¬ schen Beschichtung TBC eine höhere Oberflächenrauheit. FIG. 3 shows a further exemplary embodiment, in which recesses 13 have also been introduced on the end faces 16 of the webs 4, 7, or a rough surface has generally been produced. Thus, each contact surface having a following Kerami ¬ deposition coating TBC forms a higher surface roughness.
Die TBC auf der Oberfläche 1 weist insbesondere Zirkonoxid auf, teilstabilisiert oder vollstabilisiert, mit oder ohne keramische Anbindungsschicht . In particular, the TBC on the surface 1 has zirconium oxide, partially stabilized or fully stabilized, with or without a ceramic bonding layer.
Vorzugsweise wird sie durch HVOF-Plasmaspritzen aufgebracht.  Preferably, it is applied by HVOF plasma spraying.

Claims

Patentansprüche claims
1. Keramische Oberfläche (1), 1. Ceramic surface (1),
insbesondere eines CMC-Substrats (2),  in particular a CMC substrate (2),
die umgeschmolzen wurde und dadurch rauer ausgebildet ist als vor der Umschmelzung,  which has been remelted and thus made rougher than before remelting,
und insbesondere fraktal oder blumenkohlartig ausgebildet ist .  and in particular fractal or cauliflower-like.
2. Keramische Oberfläche nach Anspruch 1, 2. Ceramic surface according to claim 1,
die sich kreuzende Stege (4, 7, ...) mit dadurch umschlosse¬ nen Vertiefungen (10) aufweist. has the intersecting webs (4, 7, ...) with thereby surrounded ¬ recesses (10).
3. Keramische Oberfläche nach Anspruch 2, 3. Ceramic surface according to claim 2,
bei der die Vertiefungen (10) eckig,  in which the recesses (10) angular,
insbesondere quadratisch und/oder rechteckig und/oder drei- eckförmig sind.  in particular square and / or rectangular and / or triangular.
4. Keramische Oberfläche nach Anspruch 2 oder 3, 4. Ceramic surface according to claim 2 or 3,
bei der die Vertiefungen (10) rund,  in which the depressions (10) are round,
insbesondere kreisförmig und/oder ovalförmig ausgebildet sind .  in particular circular and / or oval-shaped.
5. Keramische Oberfläche nach einem oder beiden der Ansprü- che 2 oder 3, 5. Ceramic surface according to one or both of claims 2 or 3,
bei der die Dicke der Stege (4, 7) gleich ist.  in which the thickness of the webs (4, 7) is the same.
6. Keramische Oberfläche nach einem mehreren der Ansprüche 1, 2, 3 oder 4, 6. A ceramic surface according to any one of claims 1, 2, 3 or 4,
bei der die Dicke der Stege (4, 7) unterschiedlich ist.  in which the thickness of the webs (4, 7) is different.
Keramische Oberfläche nach einem oder mehreren der Ansprüche 1, 2, 3, 4, 5 oder 6, Ceramic surface according to one or more of claims 1, 2, 3, 4, 5 or 6,
bei der die umschlossene Vertiefung (10) zwischen den Ste¬ gen (4, 7, ...) eine größeren Oberflächenrauheit aufweist als die Stirnseite der Stege (4, 7) . wherein the enclosed cavity (10) between the Ste ¬ gen (4, 7, ...) having a larger surface roughness than the end face of the webs (4, 7).
Keramische Oberfläche nach einem oder mehreren der Ansprüche 1, 5 oder 6, Ceramic surface according to one or more of claims 1, 5 or 6,
bei der auch die Stirnseiten (16) der Stege (4, 7, ...) eben falls erzeugte Vertiefungen (13) zur Erhöhung der Oberflächenrauheit aufweisen.  in which also the end faces (16) of the webs (4, 7, ...) just in case generated recesses (13) to increase the surface roughness.
CMC-Bauteil, CMC component,
mit einer keramischen Oberfläche (1) eines CMC-Substrats (2) nach einem oder mehreren der Ansprüche 1 bis 8.  with a ceramic surface (1) of a CMC substrate (2) according to one or more of claims 1 to 8.
10. CMC-Bauteil nach Anspruch 9, 10. CMC component according to claim 9,
bei dem die keramische Oberfläche (1) des CMC-Substrats zu¬ mindest eine keramische Beschichtung auf der Oberfläche (1) aufweist . wherein said ceramic surface (1) of the CMC substrate at least ¬ a ceramic coating on the surface (1).
11. Keramisches Bauteil nach einem oder beiden der Ansprüche 9 oder 10, 11. Ceramic component according to one or both of claims 9 or 10,
bei dem das CMC-Substrat ein SiC/SiC-CMC mit SiC-Fasern darstellt .  wherein the CMC substrate is a SiC / SiC CMC with SiC fibers.
2. Bauteil nach einem oder beiden der Ansprüche 9 oder 10, bei dem das CMC-Substrat eine keramische Matrix aus Alumi¬ niumoxid und Aluminiumoxidfasern und/oder Aluminiumoxid- /Mullite darstellt. 2. Component according to one or both of claims 9 or 10, wherein the CMC substrate is a ceramic matrix of Alumi ¬ niumoxid and alumina fibers and / or alumina / mullite.
13. Keramisches Bauteil nach einem oder mehreren der Ansprü¬ che 10, 11 oder 12, 13. Ceramic component according to one or more of Ansprü ¬ che 10, 11 or 12,
bei dem die keramische Beschichtung eine Zirkonoxidbe- schichtung darstellt.  in which the ceramic coating is a zirconium oxide coating.
14. Verfahren zur Herstellung einer Oberfläche (1) nach Anspruch 1, 2, 3, 4, 5, 6, 7 oder 8, 14. A method for producing a surface (1) according to claim 1, 2, 3, 4, 5, 6, 7 or 8,
bei dem zur Herstellung der Vertiefungen (10) Material ab- getragen wird.  in which material is removed for producing the depressions (10).
15. Verfahren nach Anspruch 14, 15. The method according to claim 14,
bei dem eine Oberfläche,  where a surface,
insbesondere innerhalb der herzustellenden Vertiefung (10), umgeschmolzen wird.  especially within the recess (10) to be produced, is remelted.
PCT/EP2018/059428 2017-05-12 2018-04-12 Ceramic surface, cmc component and production method WO2018206220A1 (en)

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