DE19935403A1 - High-temperature, oxidation-suppressing thermal insulation composite, used successfully on metallic, inter-metallic and ceramic substrates, is made by pyrolyzing simple coating of zirconia in polysiloxane - Google Patents

High-temperature, oxidation-suppressing thermal insulation composite, used successfully on metallic, inter-metallic and ceramic substrates, is made by pyrolyzing simple coating of zirconia in polysiloxane

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Publication number
DE19935403A1
DE19935403A1 DE1999135403 DE19935403A DE19935403A1 DE 19935403 A1 DE19935403 A1 DE 19935403A1 DE 1999135403 DE1999135403 DE 1999135403 DE 19935403 A DE19935403 A DE 19935403A DE 19935403 A1 DE19935403 A1 DE 19935403A1
Authority
DE
Germany
Prior art keywords
metallic
thermal insulation
oxidation
pyrolyzing
polysiloxane
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Withdrawn
Application number
DE1999135403
Other languages
German (de)
Inventor
Michael Schuetze
Franz Dettenwanger
Stefan Lohfeld
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dechema Deutsche Gesellschaft fuer Chemisches Apparatewesen eV
Original Assignee
Dechema Deutsche Gesellschaft fuer Chemisches Apparatewesen eV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dechema Deutsche Gesellschaft fuer Chemisches Apparatewesen eV filed Critical Dechema Deutsche Gesellschaft fuer Chemisches Apparatewesen eV
Priority to DE1999135403 priority Critical patent/DE19935403A1/en
Publication of DE19935403A1 publication Critical patent/DE19935403A1/en
Withdrawn legal-status Critical Current

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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
    • C04B41/009—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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

High-temperature, oxidation-suppressing thermal insulation composite is made by pyrolyzing a simple coating of zirconia particles in polysiloxane which is converted by pyrolysis into an inorganic binder phase.

Description

Die Erfindung betrifft die Verwendung eines Kompositwerkstoffes aus wärmedämmenden Partikeln in einer haftungsvermittelnden Matrix als Wärmedämmschicht.The invention relates to the use of a composite material made of heat-insulating Particles in an adhesion-promoting matrix as a heat insulation layer.

Schichten aus ZrO2 mit Wärmedämmwirkung werden bislang als kompakte Schichten auf metallischen Substraten eingesetzt. Da diese metallischen Werkstoffe bereits an der Grenze ihrer thermischen Belastbarkeit verwendet werden, sind für die Beaufschlagung mit höheren Temperaturen andere Substrate, z. B. intermetallische Verbindungen und keramische Werkstoffe, notwendig. Die Erfindung ist außer für eine Verwendung auf metallischen Werkstoffen insbesondere zur Verwendung bei derartigen Substraten vorgesehen, um auch bei Wärmedämmschichtsystemen mit intermetallischem oder keramischem Substrat ein Maximum an Temperaturbelastbarkeit zu erreichen.ZrO 2 layers with a thermal insulation effect have so far been used as compact layers on metallic substrates. Since these metallic materials are already used at the limit of their thermal load capacity, other substrates, e.g. B. intermetallic compounds and ceramic materials, necessary. In addition to use on metallic materials, the invention is intended in particular for use with such substrates in order to achieve a maximum temperature resistance even in thermal insulation layer systems with an intermetallic or ceramic substrate.

Die Wärmedämmschicht der Erfindung wird zudem nicht mittels der üblichen und vergleichsweise teuren Verfahren wie Gasphasenabscheidung oder Plasmaspritzen hergestellt, sondern der mit wärmedämmenden Partikeln gefüllte organische Precursor wird durch einfaches Eintauchen, durch Auftragen mit einem Pinsel oder durch Sprühen mit einer Sprühpistole auf das Substrat aufgebracht und anschließend pyrolysiert.The thermal barrier coating of the invention is also not by means of the usual and comparatively expensive processes such as vapor deposition or plasma spraying, but the organic precursor filled with heat-insulating particles is through easy immersion, by application with a brush or by spraying with a Spray gun applied to the substrate and then pyrolyzed.

Hierzu eignen sich als organische Precursoren beispielsweise Polysiloxane. Diese werden zu Siliziumoxycarbid (SiOC) pyrolysiert, welches entsprechend eigener Untersuchungen geringe Oxidationsraten von weniger als 0,01 mg/(cm2 h) auch bei Temperaturen über 1500°C aufweist. Von einer Kombination mit bereits als Oxid vorliegenden Partikeln wie z. B. ZrO2 geht somit neben der Wärmedämmwirkung auch ein sehr guter Oxidationsschutz für das Substrat aus. Als wärmedämmende Partikel kommen jedoch auch andere Keramiken, wie z. B. HfO2, in Frage.Polysiloxanes, for example, are suitable as organic precursors. These are pyrolyzed to silicon oxycarbide (SiOC), which according to our own investigations has low oxidation rates of less than 0.01 mg / (cm 2 h) even at temperatures above 1500 ° C. From a combination with particles already present as an oxide such. B. ZrO 2 is not only the thermal insulation effect but also a very good oxidation protection for the substrate. However, other ceramics, such as. B. HfO 2 , in question.

Die vorgestellte keramische Bindephase zeichnet sich bei hohen Temperaturen durch eine vergleichsweise niedrige Viskosität bei gleichzeitig guter Haftwirkung aus, so daß mechanische Spannungen, z. B. aufgrund unterschiedlicher Wärmeausdehungskoeffizienten von Matrix, Einlagerungswerkstoff und Substrat oder als Folge von Betriebsbeanspruchungen, sehr gut abgebaut werden können.The presented ceramic binding phase is characterized by a high temperature comparatively low viscosity with good adhesion, so that mechanical stresses, e.g. B. due to different coefficients of thermal expansion of matrix, intercalation material and substrate or as a result of Operating stresses can be reduced very well.

Das Beschichtungssystem eignet sich insbesondere auch für poröse Substrate, da offene Porositäten beim Auftragen des niedrig viskosen gefüllten Precursors verschlossen werden und dieser bzw. (nach der Pyrolyse) die anorganische Binderphase aufgrund der Rauheit des Substrates eine gesteigerte Haftfestigkeit aufweist.The coating system is also particularly suitable for porous substrates, since they are open Porosities are closed when applying the low-viscosity filled precursor and this or (after pyrolysis) the inorganic binder phase due to the roughness of the Substrate has an increased adhesive strength.

Claims (5)

1. Verwendung eines Kompositwerkstoffes, bestehend aus wärmedämmenden Partikeln und einer anorganischen Binderphase, als Wärmedämmschicht auf metallischen, intermetallischen und keramischen Substraten.1. Use of a composite material consisting of heat-insulating particles and an inorganic binder phase, as a thermal barrier coating on metallic, intermetallic and ceramic substrates. 2. Beschichtungswerkstoff für die Verwendung nach Anspruch 1, welcher aus wärmedämmenden Partikeln in einer haftungsvermittelnden Matrix besteht.2. Coating material for use according to claim 1, which of heat-insulating particles in an adhesion-promoting matrix. 3. Beschichtungswerkstoff nach Anspruch 2, dadurch gekennzeichnet, daß als wärmedämmender Partikelwerkstoff vorzugsweise ZrO2 verwendet werden, jedoch auch andere keramische Phasen denkbar sind.3. Coating material according to claim 2, characterized in that ZrO 2 are preferably used as the heat-insulating particle material, but other ceramic phases are also conceivable. 4. Beschichtungswerkstoff nach Anspruch 2, dadurch gekennzeichnet, daß ein organischer Precursor, vorzugsweise aus der Gruppe der Polysiloxane, über eine Pyrolyse in eine anorganische Binderphase übergeführt wird.4. Coating material according to claim 2, characterized in that an organic Precursor, preferably from the group of polysiloxanes, via pyrolysis into a inorganic binder phase is transferred. 5. Beschichtungswerkstoff nach Anspruch 2, dadurch gekennzeichnet, daß der Volumenanteil der anorganischen Binderphase deutlich unter 50% beträgt.5. Coating material according to claim 2, characterized in that the Volume fraction of the inorganic binder phase is well below 50%.
DE1999135403 1999-07-30 1999-07-30 High-temperature, oxidation-suppressing thermal insulation composite, used successfully on metallic, inter-metallic and ceramic substrates, is made by pyrolyzing simple coating of zirconia in polysiloxane Withdrawn DE19935403A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1999135403 DE19935403A1 (en) 1999-07-30 1999-07-30 High-temperature, oxidation-suppressing thermal insulation composite, used successfully on metallic, inter-metallic and ceramic substrates, is made by pyrolyzing simple coating of zirconia in polysiloxane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1999135403 DE19935403A1 (en) 1999-07-30 1999-07-30 High-temperature, oxidation-suppressing thermal insulation composite, used successfully on metallic, inter-metallic and ceramic substrates, is made by pyrolyzing simple coating of zirconia in polysiloxane

Publications (1)

Publication Number Publication Date
DE19935403A1 true DE19935403A1 (en) 2001-02-08

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2617869A2 (en) * 2012-01-20 2013-07-24 General Electric Company Process of fabricating a thermal barrier coating and an article having a cold sprayed thermal barrier coating

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3102935A1 (en) * 1981-01-29 1982-09-02 Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen DEVICE FOR THE HEAT-INSULATING STORAGE OF AN ELECTRIC HEATER, IN PARTICULAR FOR A RADIATION-HEATED COOKING PLATE, AND A HEAT-INSULATING PLATE THEREFOR AND METHOD FOR THE PRODUCTION THEREOF
US4358500A (en) * 1981-08-20 1982-11-09 Subtex, Inc. Flame resistant insulating fabric compositions containing inorganic bonding agent
DE3229271A1 (en) * 1982-08-05 1984-02-09 Siemens AG, 1000 Berlin und 8000 München TEMPERATURE SHOCK RESISTANT CERAMIC LININGS
US4659610A (en) * 1984-03-02 1987-04-21 Subtex, Inc. Structures made using an inorganic-binder composition
DE3051009C2 (en) * 1980-05-29 1990-01-11 Micropore International Ltd., Hadzor, Droitwich, Worcestershire, Gb
DE3248661C2 (en) * 1982-12-30 1990-08-30 Gruenzweig + Hartmann Ag, 6700 Ludwigshafen, De
DE4129080A1 (en) * 1991-09-02 1993-03-04 Jun Sepp Dipl Ing Zeug Powdered ceramic oxide coating applies to titanium@ or titanium alloys - by painting, immersion or spraying then annealing prevents or inhibits titanium fires in e.g. aircraft gas turbines
US5240658A (en) * 1991-03-26 1993-08-31 Lukacs Iii Alexander Reaction injection molding of silicon nitride ceramics having crystallized grain boundary phases
WO1995013407A1 (en) * 1993-11-12 1995-05-18 Moltech Invent S.A. Refractory/carbon components of aluminium production cells
DE4419838C2 (en) * 1994-06-07 1998-06-10 Stephan Ahne Function-coated component, method of manufacture and use

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3051009C2 (en) * 1980-05-29 1990-01-11 Micropore International Ltd., Hadzor, Droitwich, Worcestershire, Gb
DE3102935A1 (en) * 1981-01-29 1982-09-02 Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen DEVICE FOR THE HEAT-INSULATING STORAGE OF AN ELECTRIC HEATER, IN PARTICULAR FOR A RADIATION-HEATED COOKING PLATE, AND A HEAT-INSULATING PLATE THEREFOR AND METHOD FOR THE PRODUCTION THEREOF
US4358500A (en) * 1981-08-20 1982-11-09 Subtex, Inc. Flame resistant insulating fabric compositions containing inorganic bonding agent
DE3229271A1 (en) * 1982-08-05 1984-02-09 Siemens AG, 1000 Berlin und 8000 München TEMPERATURE SHOCK RESISTANT CERAMIC LININGS
DE3248661C2 (en) * 1982-12-30 1990-08-30 Gruenzweig + Hartmann Ag, 6700 Ludwigshafen, De
US4659610A (en) * 1984-03-02 1987-04-21 Subtex, Inc. Structures made using an inorganic-binder composition
US5240658A (en) * 1991-03-26 1993-08-31 Lukacs Iii Alexander Reaction injection molding of silicon nitride ceramics having crystallized grain boundary phases
DE4129080A1 (en) * 1991-09-02 1993-03-04 Jun Sepp Dipl Ing Zeug Powdered ceramic oxide coating applies to titanium@ or titanium alloys - by painting, immersion or spraying then annealing prevents or inhibits titanium fires in e.g. aircraft gas turbines
WO1995013407A1 (en) * 1993-11-12 1995-05-18 Moltech Invent S.A. Refractory/carbon components of aluminium production cells
DE4419838C2 (en) * 1994-06-07 1998-06-10 Stephan Ahne Function-coated component, method of manufacture and use

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP 03-260047 A.,In: Patent Abstracts of Japan *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2617869A2 (en) * 2012-01-20 2013-07-24 General Electric Company Process of fabricating a thermal barrier coating and an article having a cold sprayed thermal barrier coating
EP2617869A3 (en) * 2012-01-20 2014-09-24 General Electric Company Process of fabricating a thermal barrier coating and an article having a cold sprayed thermal barrier coating

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