FR2341531A1 - Ceramic articles, e.g. turbine components, insulaters - with outer component having a different thermal coefft. of expansion - Google Patents

Ceramic articles, e.g. turbine components, insulaters - with outer component having a different thermal coefft. of expansion

Info

Publication number
FR2341531A1
FR2341531A1 FR7704904A FR7704904A FR2341531A1 FR 2341531 A1 FR2341531 A1 FR 2341531A1 FR 7704904 A FR7704904 A FR 7704904A FR 7704904 A FR7704904 A FR 7704904A FR 2341531 A1 FR2341531 A1 FR 2341531A1
Authority
FR
France
Prior art keywords
component
coefft
expansion
ceramic articles
turbine components
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Withdrawn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
FR7704904A
Other languages
French (fr)
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.)
Saint Gobain Abrasives Inc
Original Assignee
Norton Co
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
Priority to US66068576A priority Critical
Application filed by Norton Co filed Critical Norton Co
Publication of FR2341531A1 publication Critical patent/FR2341531A1/en
Withdrawn legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515Shaped 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
    • C04B35/58Shaped 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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584Shaped 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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • C04B35/591Shaped 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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by reaction sintering
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B18/00Layered products essentially comprising ceramics, e.g. refractory products
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515Shaped 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
    • C04B35/58Shaped 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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584Shaped 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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • C04B35/593Shaped 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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by pressure sintering
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656Aspects 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
    • C04B2235/6562Heating rate
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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/658Atmosphere during thermal treatment
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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/66Specific sintering techniques, e.g. centrifugal sintering
    • C04B2235/668Pressureless sintering
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    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74Physical characteristics
    • C04B2235/78Grain sizes and shapes, product microstructures, e.g. acicular grains, equiaxed grains, platelet-structures
    • C04B2235/786Micrometer sized grains, i.e. from 1 to 100 micron
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    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32Ceramic
    • C04B2237/34Oxidic
    • C04B2237/341Silica or silicates
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    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32Ceramic
    • C04B2237/34Oxidic
    • C04B2237/343Alumina or aluminates
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    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32Ceramic
    • C04B2237/34Oxidic
    • C04B2237/345Refractory metal oxides
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    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32Ceramic
    • C04B2237/34Oxidic
    • C04B2237/345Refractory metal oxides
    • C04B2237/348Zirconia, hafnia, zirconates or hafnates
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    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32Ceramic
    • C04B2237/36Non-oxidic
    • C04B2237/365Silicon carbide
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/30Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
    • C04B2237/32Ceramic
    • C04B2237/36Non-oxidic
    • C04B2237/368Silicon nitride
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2237/00Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
    • C04B2237/50Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
    • C04B2237/52Pre-treatment of the joining surfaces, e.g. cleaning, machining
    • C04B2237/525Pre-treatment of the joining surfaces, e.g. cleaning, machining by heating

Abstract

Ceramic articles, e.g. turbine components, insulators, furnace components, etc. consist of an outer component whose thermal coefft. of expansion is 1.5% to 6% greater than the inner. Pref. both parts are made of silica nitride with an additive chosen from silicon carbide, mullite, zirconium, yttria, thoria, alumina, tantalum carbide and/or titanium carbide. The inner part is pref. thicker than the outer. One pref. prod. has an outer component made of 75-95 wt.% silicon nitride and 25-5 wt.% silicon carbide with thickness 50-85% theoretical and an inner portion made of silicon nitride with thickness 90-100% theoretical.
FR7704904A 1976-02-23 1977-02-21 Ceramic articles, e.g. turbine components, insulaters - with outer component having a different thermal coefft. of expansion Withdrawn FR2341531A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US66068576A true 1976-02-23 1976-02-23

Publications (1)

Publication Number Publication Date
FR2341531A1 true FR2341531A1 (en) 1977-09-16

Family

ID=24650553

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7704904A Withdrawn FR2341531A1 (en) 1976-02-23 1977-02-21 Ceramic articles, e.g. turbine components, insulaters - with outer component having a different thermal coefft. of expansion

Country Status (4)

Country Link
JP (1) JPS52102306A (en)
DE (1) DE2707835A1 (en)
FR (1) FR2341531A1 (en)
IT (1) IT1072687B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2918689A1 (en) * 1977-07-18 1981-03-26 Gruenzweig Hartmann Glasfaser Thermally insulating building panel - where mineral fibres are pre-bonded with polymer, then impregnated with clay, coated with enamel slip, and baked
DE2744620A1 (en) * 1977-10-04 1979-04-05 Degussa High strength joints between silicon nitride parts - made using intermediate layer of hot pressed silicon nitride and alumina
JPS5565113U (en) * 1978-10-30 1980-05-06
JPS5566079U (en) * 1978-10-30 1980-05-07
JPS5750145Y2 (en) * 1978-10-30 1982-11-02
JPS61319B2 (en) * 1979-02-28 1986-01-07 Ngk Insulators Ltd
DE3122345A1 (en) * 1981-06-05 1982-12-30 Rosenthal Technik Ag Complex ceramic composite hollow bodies and process for the production thereof and use thereof
DE3243397C2 (en) * 1982-11-24 1985-07-25 Danfoss A/S, Nordborg, Dk
DE3319468C2 (en) * 1983-05-28 1986-01-30 Dornier System Gmbh, 7990 Friedrichshafen, De
JPS60141685A (en) * 1983-12-28 1985-07-26 Nihon Shiporetsukusu Kogyo Kk Raw material composition for lightweight foamed concrete
DE3407443A1 (en) * 1984-02-29 1985-08-29 Buchtal Gmbh PANEL SHAPED COMPOSITE ELEMENT
JP2554491B2 (en) * 1987-05-13 1996-11-13 日本特殊陶業株式会社 Method of manufacturing ceramic rotating body
JP2739343B2 (en) * 1989-06-12 1998-04-15 本田技研工業株式会社 Hybrid turbine rotor
DE4029972C2 (en) * 1990-09-21 1993-03-04 Siemens Ag, 8000 Muenchen, De

Also Published As

Publication number Publication date
JPS52102306A (en) 1977-08-27
IT1072687B (en) 1985-04-10
DE2707835A1 (en) 1977-09-29

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