GB1352853A - Method of forming ceramic articles and articles formed by such a method - Google Patents

Method of forming ceramic articles and articles formed by such a method

Info

Publication number
GB1352853A
GB1352853A GB1352853DA GB1352853A GB 1352853 A GB1352853 A GB 1352853A GB 1352853D A GB1352853D A GB 1352853DA GB 1352853 A GB1352853 A GB 1352853A
Authority
GB
United Kingdom
Prior art keywords
sections
section
mixture
silicon nitride
mould
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.)
Expired
Application number
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Publication of GB1352853A publication Critical patent/GB1352853A/en
Expired legal-status Critical Current

Links

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
    • 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
    • C04B35/58—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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584—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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • C04B35/593—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 borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by pressure sintering

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Products (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

1352853 Hot pressing ceramic articles DEFENCE SECRETARY OF STATE FOR 20 Oct 1971 [3 Nov 1970] 52174/70 Heading B5A [Also in Division C1] An article having at least two sections of differing wall thickness is hot pressed from silicon nitride in two stages, in the first of which a first mixture of silicon nitride powder and a fluxing agent is hot pressed in a first mould to provide a first section which is then placed in a second mould which accommodates the first section and in which one or more other sections can be formed; in the second stage the remaining mould space is filled with a second mixture of silicon nitride powder and a fluxing agent so that the said one or more other sections may be formed by hot pressing the second mixture, the resultant one or more sections becoming bonded to the first. By using removable graphite cores, internal duets may be provided in the first section. One section may comprise the aerofoil portions of a gas turbine engine blade and the other either the platform or a shroud of the blade.
GB1352853D 1970-11-03 1970-11-03 Method of forming ceramic articles and articles formed by such a method Expired GB1352853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5217470 1970-11-03

Publications (1)

Publication Number Publication Date
GB1352853A true GB1352853A (en) 1974-05-15

Family

ID=10462908

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1352853D Expired GB1352853A (en) 1970-11-03 1970-11-03 Method of forming ceramic articles and articles formed by such a method

Country Status (4)

Country Link
JP (1) JPS55353B1 (en)
DE (1) DE2154480C3 (en)
FR (1) FR2124013A5 (en)
GB (1) GB1352853A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2147531A5 (en) * 1971-07-28 1973-03-09 Lucas Industries Ltd Silicon nitride - assembly of two blocks
US3885294A (en) * 1974-04-03 1975-05-27 Ford Motor Co Method of making a bonded silicon nitride article having portions of different density
GB1497990A (en) * 1975-11-10 1978-01-12 Tokyo Shibaura Electric Co Composite ceramic articles and a method of manufacturing the same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB970639A (en) * 1960-03-24 1964-09-23 Plessey Co Ltd Method of producing high density silicon nitride

Also Published As

Publication number Publication date
DE2154480B2 (en) 1974-10-10
FR2124013A5 (en) 1972-09-15
DE2154480C3 (en) 1975-06-05
JPS55353B1 (en) 1980-01-07
DE2154480A1 (en) 1972-05-18

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PCNP Patent ceased through non-payment of renewal fee