GB2143812A - Manufacture of ceramics - Google Patents
Manufacture of ceramics Download PDFInfo
- Publication number
- GB2143812A GB2143812A GB08418736A GB8418736A GB2143812A GB 2143812 A GB2143812 A GB 2143812A GB 08418736 A GB08418736 A GB 08418736A GB 8418736 A GB8418736 A GB 8418736A GB 2143812 A GB2143812 A GB 2143812A
- Authority
- GB
- United Kingdom
- Prior art keywords
- matrix
- ceramic
- fibre layer
- fibre
- sintering
- 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.)
- Granted
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- 239000000919 ceramic Substances 0.000 title claims abstract description 57
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000000835 fiber Substances 0.000 claims abstract description 67
- 239000011159 matrix material Substances 0.000 claims abstract description 48
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 17
- 238000005245 sintering Methods 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims abstract description 7
- 230000008595 infiltration Effects 0.000 claims abstract description 6
- 238000001764 infiltration Methods 0.000 claims abstract description 6
- 230000036961 partial effect Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 15
- 239000004744 fabric Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 1
- 239000012634 fragment Substances 0.000 abstract description 7
- 230000003014 reinforcing effect Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000462 isostatic pressing Methods 0.000 abstract description 4
- 238000007569 slipcasting Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 8
- 238000005336 cracking Methods 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 239000011226 reinforced ceramic Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000005322 wire mesh glass Substances 0.000 description 1
Classifications
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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
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- 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
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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
- C04B35/01—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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- 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
- C04B35/515—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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- 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
- 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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- 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
- 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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- 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
- 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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- 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
- 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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- 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
- 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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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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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- 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
- 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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- 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
- 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
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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
- 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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- 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
- 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
- C04B2237/36—Non-oxidic
- C04B2237/365—Silicon carbide
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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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
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- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laminated Bodies (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Ceramic components are made by forming, prior to sintering, a green ceramic matrix with at least one fibre layer consisting of similar ceramic material in or on the matrix with no, or only partial, infiltration of the matrix material into the fibre layer, and then sintering the matrix and fibre layer together. The matrix and fibre layer may be formed together by putting the latter in a mould and slip casting the matrix, or by isostatic pressing the matrix and fibre layer(s) together in a mould. Owing to the partially homogeneous union between similar composite materials the reinforcing fibre layer produces a crack-stopping and fragment-containing effect in the event of rupture of the ceramic component.
Description
SPECIFICATION
Manufacture of highly heat-resistant ceramic components
This invention relates to a method of manufacturing highly heat-resistant ceramic components and, more particularly, to a component manufactured by such a method.
Owing to the brittleness of ceramic materials, cracking will normally lead to the failure of the component by fracture. A fractured ceramic component may have catastrophic consequences, e.g.
when the ceramic component is a rotor blade of a gas turbine.
In the case of wired glass, (metal) wires are imbedded, for example by fusion, to keep fragments of a broken component in the structure of the component despite cracking. This is an important consideration especially when loose fragments might cause further damage by way of chain reaction, so that minor initial damage could produce considerable consequential damage.
In highly heat-resistant ceramic components it is difficult, for a number of reasons, to imbed metal wires. Ceramic materials have a clearly higher modulus of elasticity than metal wire. Unlike the case of using wires in glass, therefore, any strengthening effect of wires under tensile load in ceramic components is not anticipated. Also, the thermal service range of highly heat-resistant ceramic materials is clearly higher than that of metal wire. Metal wire will usually melt in the normal thermal service range of heat-resistant ceramic materials. Another consideration is that undesirable (chemical) reactions may occur between metal wire and ceramic material when they are being joined together or in service.Also, in the case of structured ceramic components having an internal metal structure the metal structure might overheat if fracture or cracking of the component allows hot gas to impinge directly on the metal. Additionally, differences in thermal expansion do not make the use of the two materials in a composite component desirable.
In a broad aspect of the present invention a method of manufacturing highly heat-resistant components is provided which is remarkably simply and permits the manufacture of high-strength ceramic components, in which even in the event of cracking or fracture of the components, an otherwise loose fragment will remain in the component structure.
It is a particular object of he present invention to deposit, before sintering, at least one layer of fibre of a similar ceramic material on or in the ceramic matrix of a green compact to be sintered.
According to the present invention, there is provided a method of manufacturing a highly heat-resistant ceramic product, comprising the steps of forming, prior to sintering, a composite body consisting of a green ceramic matrix with at least one fibre layer, or continuous structure of fibres, of the same or a similar ceramic material, on or in the matrix such that the fibre layer or structure is not, or is at most only partially, infiltrated or penetrated by the ceramic matrix material, and thereafter sintering together the fibre layer or stucture and the ceramic matrix.
The layer of similar ceramic material fibre may, e.g., be SiC fibre if SiC ceramic material is used as the matrix, or Awl203 fibre if AT203 material is used.
During sintering, the non-reinforced ceramic body and the ceramic fibre will partially unite to provide a homogeneous unit. In the process the fibre layer is not to be fully infiltrated into the ceramic matrix; otherwise, the fibre will rupture concurrently and the crack-stopping and fragment-containing effect is lost if the ceramic matrix is ruptured.
The method may consist of the steps of depositing, prior to sintering, at least one fibre layer of a similar ceramic material on or into a green ceramic that the said fibre layer is not, or is at most only partially, infiltrated by the ceramic matrix material, and thereafter sintering together the fibre layer and the ceramic matrix.
As long as the ceramic material is undamaged the intermediate fibre layer provided in accordance with the present invention prevents an undesirably high degree of heat transfer by radiation and/or convection. The intermediate layer may also serve for the soft (i.e. damped) transfer of forces to supporting structures and to balance differences in thermal expansion between the ceramic material and supporting cores, if used. In the event of cracking or fracture the fail-safe performance is improved for the reason that ceramic fibre is not nearly as sensitive to hot gas as would be metal wire or the like.
In an advantageous manufacturing method, the fibre layer is deposited in a slip mould before the actual sintering process commences. The viscosity of the slip and/or the composition of the fibre layer must be such that no, or at most only partial, infiltration of the fibre layer by the slip with respect to the entire thickness of the fibre layer occurs.
Alternatively the fibre layer is deposited, prior to isostatic pressing, in a mould and is then pressed into the ceramic matrix.
The ceramic fibre layer to be used is preferably made up of randomly oriented fibre layers, such as felt matting, or directionally oriented fibre layers (fabric, unidirectional material). Advantageously, the fibre layer is a mat made of fabric with threedimensionally oriented ceramic fibres and high lateral strength, that is, strength in a direction perpendicular to the plane of the mat.
In accordance with the present invention, therefore, similar materials are used for both the actual component and the reinforcement, in order to preclude conflicting material characteristics as described in the cited state of the art.
A ceramic composite component manufactured in accordance with the method of the present invention has a uniform modulus of elasticity. The thermal service range is clearly higher than that for components using metal wire reinforcement. Apart from the chemical sintering process no other chemical reactions occur between the individual materials. No differences in thermal expansion oc cur between the fibre layer and the ceramic matrix.
The invention clearly improves especially the failsafe protection from catastrophic failure of components as might occur with a fracture involving loose fragments. Ceramic components manufactured in accordance with the present invention would be advantageous, especially for combustion chamber tubes and turbine blades exposed to high thermal and/or mechanical stresses.
The invention may be put into practice in a number of ways but certain specific embodiments will now be described, by way of example, with reference to the drawings, in which:
Figure 1 illustrates a (simple) component manufactured in accordance with the method of the present invention; and
Figure 2 illustrates an alternative component having an integrated layer of reinforcing fibre.
The ceramic component illustrated in Figure 1 consists of a non-reinforced ceramic matrix 1 laterally deposited on which is a fibre layer of a similar ceramic material. For manufacturing the ceramic component, the ceramic fibre layer 2, which may be randomly oriented fibre felt matting or directionally oriented fibre material, is deposited on the green, i.e. unfired, compact or matrix. Subsequent sintering unites the ceramic matrix 1 with the reinforcing fibre layer 2, though the fibre layer is not fully infiltrated into the ceramic matrix but the matrix and fibre layer form a partially homogeneous sintered union. The partially formed sintered union between the composite materials ensures that fracture of the matrix will not be attended by fibre fracture. This enables the similar ceramic fibre layer to act as a reinforcing layer of the green ceramic compact proper.
The ceramic component illustrated in Fig. 2 consists of a fibre layer 2 completely imbedded in the green compact or matrix before sintering. The reinforcing fibre layer (2), therefore, is sandwiched between two ceramic matrix layers to reinforce them.
In the manufacture of ceramic components$, the fibre layer can be deposited by, e.g., a slip moulding process, the fibre layer being placed in the mould cavity into which ceramic slip is then introduced which casts to form the matrix. The viscosity of the slip and/or the composition of the fibre layer must be such that no, or at most only partial, infiltration or penetration of the slip into the whole thickness of the fibre layer occurs.
Alternatively, the fibre layer can be deposited in the mould, perhaps over a core, and pressed into place by isostatic pressing.
For example, in a preferred embodiment of a method in accordance with the invention, a ceramic fibre layer of SiC material having a thickness of Imm is deposited on a matrix material consisting of SiC and an organic binder (e.g. thermoplastic binder) and having a thickness of 5 mm. The ceramic fibre layer and ceramic matrix layer are cold isostatically pressed together under a pressure of 2000 bar. Thereafter, the organic binder is burned out. Then the component is sintered in inert gas for 20 minutes at a temperature of 1700"C. 2000"C.
In summary, in accordance with the invention, ceramic components are made by forming, prior to sintering, a green ceramic matrix with at least one fibre layer consisting of similar ceramic material in or on the matrix with no, or only partial, infiltration of the matrix material into the fibre layer, and then sintering the matrix and fibre layer together. The matrix and fibre layer may be formed together by putting the latter in a mould and slip casting the matrix, or by isostatic pressing the matrix and fibre layer(s) together in a mould. Owing to the partially homogeneous union between similar composite materials the reinforcing fibre layer produces a crack-stopping and fragment-containing effect in the event of rupture of the ceramic component.
Claims (8)
1. A method of manufacturing a highly heat-resistant ceramic product, comprising the steps of forming, prior to sintering, a composite body consisting of a green ceramic matrix with at least one fibre layer, or continuous structure of fibres, of the same or a similar ceramic material, on or in the matrix such that the fibre layer or structure is not, or is at most only partially, infiltrated or penetrated by the ceramic matrix material, and thereafter sintering together the fibre layer or stucture and the ceramic matrix.
2. A method as claimed in claim 1, in which the fibre layer or structure is formed in or on the matrix in a slip moulding process, the viscosity of the slip being such that no, or at most only partial, infiltration of the slip matrix material with respect to the thickness of the fibre layer or structure occurs.
3. A method as claimed in claim 1, in which the fibre layer or structure is deposited in or on the matrix in a mould, and the fibre layer or structure and the matrix are then pressed together isostatically in a pressing operation.
4. A method as claimed in any one of claims 1 to 3, in the fibre layer or structure is made of randomly oriented ceramic fibre.
5. A method as claimed in any one of claims 1 to 3, in which the fibre layer or structure is a mat made of fabric with three-dimensionally oriented ceramic fibres and high lateral strength (in a direction perpendicular to the plane of the mat).
6. A method of manufacturing a highly heat-resistant ceramic component substantially as specifically described herein with reference to any one of the embodiments.
7. A highly heat-resistant ceramic product or component made in accordance with the method of any one of the preceding claims.
8. A highly heat-resistant ceramic component comprising a sintered body consisting of a ceramic matrix and a layer or structure of fibres of the same or similar ceramic material formed in or on the matrix with no, or only partial, infiltration of the fibre layer or structure by the matrix prior to sintering.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3327219 | 1983-07-28 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8418736D0 GB8418736D0 (en) | 1984-08-30 |
| GB2143812A true GB2143812A (en) | 1985-02-20 |
| GB2143812B GB2143812B (en) | 1986-10-29 |
Family
ID=6205135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08418736A Expired GB2143812B (en) | 1983-07-28 | 1984-07-23 | Manufacture of ceramics |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS6044344A (en) |
| FR (1) | FR2549823B1 (en) |
| GB (1) | GB2143812B (en) |
| SE (1) | SE461275B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2212152A (en) * | 1987-10-26 | 1989-07-19 | Central Glass Co Ltd | Glass or ceramic plate reinforced with fibrous or flaky material and method of producing same |
| AU620177B2 (en) * | 1988-12-08 | 1992-02-13 | Imperial Chemical Industries Plc | Production of fibre reinforced ceramic composite |
| US5589115A (en) * | 1987-11-16 | 1996-12-31 | Corning Incorporated | Method for making fiber-reinforced ceramic matrix composite |
| EP0794403A3 (en) * | 1996-03-06 | 1998-08-05 | Solar Turbines Incorporated | High pressure ceramic heat exchanger |
| CN102537155A (en) * | 2011-12-29 | 2012-07-04 | 中国科学院过程工程研究所 | C/C-SiC-ZrC-ZrB2 composite ceramic-based friction brake material and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63173635A (en) * | 1987-01-14 | 1988-07-18 | 株式会社イナックス | Large-sized pottery board having multilayer structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0073024A2 (en) * | 1981-08-21 | 1983-03-02 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Laminated wall of a hollow body and process for manufacturing the same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2429925A1 (en) * | 1973-06-26 | 1975-01-23 | Metalaids Processes Ltd | THERMAL INSULATING MATERIAL AND METHOD FOR MANUFACTURING IT |
| 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 |
| GB2104837B (en) * | 1981-08-26 | 1985-10-02 | Shinagawa Refractories Co | Prefabricated insulating fibre composite block for furnace lining |
-
1984
- 1984-05-29 SE SE8402907A patent/SE461275B/en not_active IP Right Cessation
- 1984-07-18 FR FR848411346A patent/FR2549823B1/en not_active Expired - Lifetime
- 1984-07-20 JP JP59151964A patent/JPS6044344A/en active Pending
- 1984-07-23 GB GB08418736A patent/GB2143812B/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0073024A2 (en) * | 1981-08-21 | 1983-03-02 | Mtu Motoren- Und Turbinen-Union MàNchen Gmbh | Laminated wall of a hollow body and process for manufacturing the same |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2212152A (en) * | 1987-10-26 | 1989-07-19 | Central Glass Co Ltd | Glass or ceramic plate reinforced with fibrous or flaky material and method of producing same |
| US4987028A (en) * | 1987-10-26 | 1991-01-22 | Central Glass Company, Limited | Glass or ceramic plate reinforced with fibrous or flaky material and method of producing same |
| GB2212152B (en) * | 1987-10-26 | 1991-10-02 | Central Glass Co Ltd | Glass or ceramic plate reinforced with fibrous or flaky material and method of producing same |
| US5589115A (en) * | 1987-11-16 | 1996-12-31 | Corning Incorporated | Method for making fiber-reinforced ceramic matrix composite |
| AU620177B2 (en) * | 1988-12-08 | 1992-02-13 | Imperial Chemical Industries Plc | Production of fibre reinforced ceramic composite |
| EP0794403A3 (en) * | 1996-03-06 | 1998-08-05 | Solar Turbines Incorporated | High pressure ceramic heat exchanger |
| US5954128A (en) * | 1996-03-06 | 1999-09-21 | Solar Turbines | High pressure ceramic heat exchanger |
| CN102537155A (en) * | 2011-12-29 | 2012-07-04 | 中国科学院过程工程研究所 | C/C-SiC-ZrC-ZrB2 composite ceramic-based friction brake material and preparation method thereof |
| CN102537155B (en) * | 2011-12-29 | 2014-02-26 | 中国科学院过程工程研究所 | C/C-SiC-ZrC-ZrB2 complex-phase ceramic-based frictional braking material and preparation method thereof |
| CN103693984A (en) * | 2011-12-29 | 2014-04-02 | 中国科学院过程工程研究所 | Carbon fiber enhanced multiphase ceramic-based friction baking material and preparation method thereof |
| CN103693984B (en) * | 2011-12-29 | 2015-08-26 | 中国科学院过程工程研究所 | Fibre reinforced complex phase ceramic base friction braking material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2549823B1 (en) | 1991-11-22 |
| GB8418736D0 (en) | 1984-08-30 |
| GB2143812B (en) | 1986-10-29 |
| FR2549823A1 (en) | 1985-02-01 |
| SE461275B (en) | 1990-01-29 |
| SE8402907D0 (en) | 1984-05-29 |
| JPS6044344A (en) | 1985-03-09 |
| SE8402907L (en) | 1985-01-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19950723 |