SE461275B - Foerfarande foer framstaellning av varmhaallfast keramik samt enligt foerfarandet framstaelld keramikkomponent - Google Patents

Foerfarande foer framstaellning av varmhaallfast keramik samt enligt foerfarandet framstaelld keramikkomponent

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Publication number
SE461275B
SE461275B SE8402907A SE8402907A SE461275B SE 461275 B SE461275 B SE 461275B SE 8402907 A SE8402907 A SE 8402907A SE 8402907 A SE8402907 A SE 8402907A SE 461275 B SE461275 B SE 461275B
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Sweden
Prior art keywords
ceramic
ceramics
fibrous layer
layer
heatherful
Prior art date
Application number
SE8402907A
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English (en)
Other versions
SE8402907D0 (sv
SE8402907L (sv
Inventor
A Rossmann
W Huether
Original Assignee
Mtu Muenchen Gmbh
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Filing date
Publication date
Application filed by Mtu Muenchen Gmbh filed Critical Mtu Muenchen Gmbh
Publication of SE8402907D0 publication Critical patent/SE8402907D0/sv
Publication of SE8402907L publication Critical patent/SE8402907L/sv
Publication of SE461275B publication Critical patent/SE461275B/sv

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    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/71—Ceramic products containing macroscopic reinforcing agents
    • C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
    • C04B35/80—Fibres, filaments, whiskers, platelets, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
    • C—CHEMISTRY; METALLURGY
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/111—Fine ceramics
    • C04B35/117—Composites
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5216—Inorganic
    • C04B2235/522—Oxidic
    • C04B2235/5224—Alumina or aluminates
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5216—Inorganic
    • C04B2235/524—Non-oxidic, e.g. borides, carbides, silicides or nitrides
    • C04B2235/5244—Silicon carbide
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5252—Fibers having a specific pre-form
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5268—Orientation of the fibers
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/602—Making the green bodies or pre-forms by moulding
    • C04B2235/6027—Slip casting
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/604—Pressing at temperatures other than sintering temperatures
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/616—Liquid infiltration of green bodies or pre-forms
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6567—Treatment time
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/658—Atmosphere during thermal treatment
    • C—CHEMISTRY; METALLURGY
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    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32—Ceramic
    • C04B2237/34—Oxidic
    • C04B2237/343—Alumina or aluminates
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    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32—Ceramic
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    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32—Ceramic
    • C04B2237/38—Fiber or whisker reinforced
    • C—CHEMISTRY; METALLURGY
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    • C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/70—Forming laminates or joined articles comprising layers of a specific, unusual thickness
    • C04B2237/704—Forming laminates or joined articles comprising layers of a specific, unusual thickness of one or more of the ceramic layers or articles

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Composite Materials (AREA)
  • Laminated Bodies (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Description

2 46l 2.75 upptagande och brottsäkrande effekten pa grund av det samtidiga fiberbrot- tet skulle ga förlorad.
Mellanskiktet av fibrer enligt uppfinningen förhindrar vid oskadad keramik en icke önskvärd kraftig värmeöverföring genom strålning och/eller konvektion. Vidare kan mellanskiktet övertaga en mjuk kraftöverföring till stödjande strukturer och utjämna värmeutvidgningsskillnader mellan keramik och eventuellt stödjande kärnor. Vid sprickbildning eller brott uppnås ett bättre felsäkerhetsförhållande, eftersom keramikfibrerna icke på långt när är sä känsliga mot den omgivande varma gasen som metalltrådar.
Ett lämpligt framställningsförfarande utmärker sig genom att fiberskiktet inlägges i en lerform innan den egentliga sintringen påbörjas.
Alternativt kan emellertid även fiberskíktet före isostatpress- ningen inläggas i en pressform och därefter inpressas i kerarnikmatrisen.
Som keramikfibrer kommer särskilt oriktade fiberskikt såsom filtmattor eller riktade fiberskikt ifråga (enriktad väv).
Genom uppfinningen utnyttjas sålunda för den egentliga kompo- nenten samt för komponentens förstärkning artbefryndade keramikmaterial, för att utjämna olika karaktäristik för materialen såsom är fallet vid den inledningsvis nämnda teknikens ståndpunkt. Den enligt uppfinningen framstäl- lda keramiska sammansatta komponenten har en enhetlig elasticitetsmodul.
Temperaturomradet vid användning är betydligt större än vid användning av metalliska förstärkningstrådar. Jämte den kemiska sintringsprocessen sker inga ytterligare kemiska reaktioner mellan de enskilda materialen. Värmeut- vidgningsskillnader mellan fiberskiktet och keramikmatrisen uppträder icke.
Därmed förbättras avsevärt genom uppfinningen särskilt felsäkerhetsförhål- landet mot katastrofala fel i komponenter (brott med lösa brottstycken).
Enligt uppfinningen framställda keramikkomponenter kan särskilt vara bränn- kammarrör och turbinskovlar, som i värme och/eller mekaniskt utsättas för kraftiga pakänningar.
Uppfinningen skall i det följande närmare beskrivas med hänvis- ning till bifogade ritning.
Fig. l visar en enligt uppfinningen framställd (enkel) keramikkomponent.
F ig. 2 visar en annan keramikkomponent med inlagt förstärkningsfiberskikt.
Den i fig. l visade keramikkomponenten innefattar en oförstärkt keramikmatris 1, som på sidan är belagd med ett fiberskikt av artbefryndad keramik. För framställning av komponenten anbringas keramikfiberskiktet 2, som kan vara en oriktat filtmatta eller ett riktat fibermaterial i form av en väv, på utgångskroppen. Genom det påföljande sintringsförloppet inträffar en 3 461 275 förening mellan keramikmatrisen 1 och förstärkningsfiberskiktet 2, varvid fiberskiktet icke fullständigt införas i keramikmatrisen (delvis homogen sinterförening). Den endast delvisa utbildade sinterföreningen mellan mate- rialen sörjer för att vid brott matrisen icke samtidigt utsättes för ett fiberbrott. Därigenom kan det artbefryndadegkeramiska fiberskiktet fungera som förstärkningsskikt i den egentliga utgàngskroppen av keramik.
Den i fig. 2 visade keramikkomponenten innefattar ett fiberskikt 2 av keramik, som före-sintringsförloppet är fullständigt infört i utgàngskrop- pen. Förstärkningsfiberskiktet 2 befinner sig sålunda mellan tvâ keramikskikt för att förstärka desamma.
Vid framställningen av keramikkompnnenterna kan fiberskiktet exempelvis inläggas i en lerform. Skiktet kan emellertid även före isostat- pressningen läggas och inpressas i pressformen Lex. pa en kärna.

Claims (6)

461 27 5 4 PATENTKRAV
1. För-farande för framställning av varrnhâllfast keramik, genom sintríng av utgangskroppar, k ä n n e t e c k n a t därav, att, före sintring, åtminstone ett fiber-skikt (2) av artbefryndad keramik anbringas vid, respekti- ve införes i, keramikmatrisen pa sa sätt att fiberskiktet endast till en del umges av keramiskt material.
2. Förfarande enligt krav l, k ä n n e t e c k n a t av att fiberskiktet (2) inlägges i en lerform.
3. Förfarande enligt krav 1, k ä n n e t e c k n a t av att fiberskiktet (2) före ett isostatpressningsförlopp inlâgges 1 en pressform och därefter inpressas i keramikmatrisen (1).
4. oriktad keramikfiber användes.
5. riktad keramikfíber användes.
6. gaende kraven, k ä n n e t e c k n a d av att en keramikmatris (1) är förbun- den med minst ett riktat eller icke riktat fiberskikt (2) av artbefryndad keramik varvid fiberskiktet endast delvis är infört i keramikmatrisen. Förfarande enligt kraven 1 till 3, k ä n n e t e c k n a t av att en Förfarande enligt kraven l till 3, k ä n n e t e c k n a t av att en Keramikkomponent framställd genom förfarandet enligt de före-
SE8402907A 1983-07-28 1984-05-29 Foerfarande foer framstaellning av varmhaallfast keramik samt enligt foerfarandet framstaelld keramikkomponent SE461275B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3327219 1983-07-28

Publications (3)

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SE8402907D0 SE8402907D0 (sv) 1984-05-29
SE8402907L SE8402907L (sv) 1985-01-29
SE461275B true SE461275B (sv) 1990-01-29

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Application Number Title Priority Date Filing Date
SE8402907A SE461275B (sv) 1983-07-28 1984-05-29 Foerfarande foer framstaellning av varmhaallfast keramik samt enligt foerfarandet framstaelld keramikkomponent

Country Status (4)

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JP (1) JPS6044344A (sv)
FR (1) FR2549823B1 (sv)
GB (1) GB2143812B (sv)
SE (1) SE461275B (sv)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63173635A (ja) * 1987-01-14 1988-07-18 株式会社イナックス 多層構造の大形陶磁器板の製造方法
JP2559428B2 (ja) * 1987-10-26 1996-12-04 セントラル硝子株式会社 セラミック焼成体およびその製造法
CA1316672C (en) * 1987-11-16 1993-04-27 Corning Glass Works Method for making fiber-reinforced ceramic matrix composite
GB8828638D0 (en) * 1988-12-08 1989-01-11 Ici Plc Production of fibre reinforced composite
US5954128A (en) * 1996-03-06 1999-09-21 Solar Turbines High pressure ceramic heat exchanger
CN103693984B (zh) * 2011-12-29 2015-08-26 中国科学院过程工程研究所 碳纤维增强复相陶瓷基摩擦制动材料及其制备方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2429925A1 (de) * 1973-06-26 1975-01-23 Metalaids Processes Ltd Waermeisolierendes material und verfahren zu seiner herstellung
JPS5292216A (en) * 1976-01-30 1977-08-03 Nippon Carbon Co Ltd Flexible graphite sheet materials
JPS5439009A (en) * 1977-08-31 1979-03-24 Asahi Chem Ind Co Ltd Preparation of methacrylate
US4357387A (en) * 1981-08-20 1982-11-02 Subtex, Inc. Flame resistant insulating fabric compositions prepared by plasma spraying
DE3133209C2 (de) * 1981-08-21 1985-04-25 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Hohler Verbundkörper, insbesondere Umdrehungskörper und Verfahren zu seiner Herstellung
GB2104837B (en) * 1981-08-26 1985-10-02 Shinagawa Refractories Co Prefabricated insulating fibre composite block for furnace lining

Also Published As

Publication number Publication date
FR2549823B1 (fr) 1991-11-22
GB2143812B (en) 1986-10-29
FR2549823A1 (fr) 1985-02-01
GB8418736D0 (en) 1984-08-30
SE8402907D0 (sv) 1984-05-29
JPS6044344A (ja) 1985-03-09
GB2143812A (en) 1985-02-20
SE8402907L (sv) 1985-01-29

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