GB942082A - An improved heat resisting material comprising self-bonded silicon nitride with or without silicon carbide dispersed therein and method for producing it - Google Patents

An improved heat resisting material comprising self-bonded silicon nitride with or without silicon carbide dispersed therein and method for producing it

Info

Publication number
GB942082A
GB942082A GB375161A GB375161A GB942082A GB 942082 A GB942082 A GB 942082A GB 375161 A GB375161 A GB 375161A GB 375161 A GB375161 A GB 375161A GB 942082 A GB942082 A GB 942082A
Authority
GB
United Kingdom
Prior art keywords
firing
nitriding
self
hours
shaped body
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
GB375161A
Inventor
Norman Lawrence Parr
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB375161A priority Critical patent/GB942082A/en
Priority to US225120A priority patent/US3215547A/en
Publication of GB942082A publication Critical patent/GB942082A/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
    • C04B35/591—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 reaction sintering

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Products (AREA)

Abstract

A shaped body of self-bonded silicon nitride wherein the nitride is predominantly in the b phase is made by (a) compacting powdered silicon to the required shape and firing it initially at 1250-1350 DEG C. and then completing nitriding at 1700 DEG C., in an atmosphere of nitrogen; (b) as in (a) but firing the shaped body for a short period, 1125 DEG C. for 1 hour, working the body to the required finished shape, e.g. with diamond impregnated grinding tools, and firing to effect complete nitriding at 1250-1350 DEG C. for at least 10 hours with final firing at 1700 DEG C., e.g. for 6 hours at atmospheric pressure; (c) as in (a) or (b) but mixing up to 10% by weight SiC powder finer than 80 B.S.S. mesh with the powdered silicon. Higher pressures than atmospheric for nitriding may also be used. Specifications 887,942 and 895,769 are referred to.ALSO:A shaped body of self-bonded silicon nitride containing up to 10% by weight silicon carbide wherein the nitride is predominantly in the b phase is made by (a) compacting powdered silicon with up to 10% by weight silicon carbide powder finer than 80 B.S.S. mesh to the required shape and firing it initially at 1250-1350 DEG C. and then completely nitriding at 1700 DEG C. in an atmosphere of nitrogen; (b) as in (a) but firing the shaped body for a short period 1125 DEG C. for one hour, working the body to the required finished shape, e.g. with diamond impregnated grinding tools, and firing to effect complete nitriding at 1250-1350 DEG C. for at least ten hours with final firing at 1700 DEG C. e.g. for six hours at atmospheric pressure. Higher pressures than atmospheric for nitriding may be used. Specifications 887,942 and 895,769 are referred to.
GB375161A 1961-02-01 1961-02-01 An improved heat resisting material comprising self-bonded silicon nitride with or without silicon carbide dispersed therein and method for producing it Expired GB942082A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB375161A GB942082A (en) 1961-02-01 1961-02-01 An improved heat resisting material comprising self-bonded silicon nitride with or without silicon carbide dispersed therein and method for producing it
US225120A US3215547A (en) 1961-02-01 1962-09-20 Heat resisting material and method for making it

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB375161A GB942082A (en) 1961-02-01 1961-02-01 An improved heat resisting material comprising self-bonded silicon nitride with or without silicon carbide dispersed therein and method for producing it

Publications (1)

Publication Number Publication Date
GB942082A true GB942082A (en) 1963-11-20

Family

ID=9764293

Family Applications (1)

Application Number Title Priority Date Filing Date
GB375161A Expired GB942082A (en) 1961-02-01 1961-02-01 An improved heat resisting material comprising self-bonded silicon nitride with or without silicon carbide dispersed therein and method for producing it

Country Status (1)

Country Link
GB (1) GB942082A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122155A (en) * 1977-01-03 1978-10-24 General Electric Company Preparation of silicon nitride powder
US4492665A (en) * 1981-05-25 1985-01-08 Swedish Institute For Silicate Research Process for the production of mouldings from materials based on silicon nitride
GB2173493A (en) * 1985-04-11 1986-10-15 Toshiba Ceramics Co Producing b-si3n4

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4122155A (en) * 1977-01-03 1978-10-24 General Electric Company Preparation of silicon nitride powder
US4492665A (en) * 1981-05-25 1985-01-08 Swedish Institute For Silicate Research Process for the production of mouldings from materials based on silicon nitride
GB2173493A (en) * 1985-04-11 1986-10-15 Toshiba Ceramics Co Producing b-si3n4
US4888142A (en) * 1985-04-11 1989-12-19 Toshiba Ceramics Co., Ltd. Process for producing β-form Si3 N4

Similar Documents

Publication Publication Date Title
GB887942A (en) An improved heat resisting material comprising self-bonded silicon nitride with silicon carbide dispersed therein and method for producing it
GB997352A (en) Abrasive bodies
GB1456314A (en) Diamond nondiamond carbon polycrystalline composites
ES272672A1 (en) Method of manufacturing grinding wheels and the like
GB1100446A (en) Diamond-containing abrasive body and process for the preparation thereof
ES475258A1 (en) Process for manufacturing dense polycrystalline shaped articles of boron carbide by pressureless sintering.
YU332775A (en) Process for the consolidation of morble block and similar natural stone
GB1069108A (en) A process for preparing silicon nitride articles
US3591337A (en) Method of manufacturing silicon nitride
GB942082A (en) An improved heat resisting material comprising self-bonded silicon nitride with or without silicon carbide dispersed therein and method for producing it
GB876924A (en) Improvements in or relating to the production of shaped carbon bodies
GB1123602A (en) Production of refractory bodies
JPS53117386A (en) Sindered body for heat and sink production of the same
JPS54292A (en) Composite cutting tool
GB1396916A (en) Method for the production of mouldings of great hardness which contains silicon nitride and or silicon oxynitride
FR2322113A1 (en) Silicon carbide based bearing material - contg. boron carbide additive, for watch parts
GB895769A (en) Improvements in or relating to shaped silicon nitride bodies and their manufacture
GB1021053A (en) An improved heat resisting material and method for producing it
SU453040A1 (en) METHOD OF OBTAINING COMPOSITION MATERIAL
JPS5515981A (en) Diamond sintered body
JPS57108229A (en) Production of cubic boron nitride bound body
GB874250A (en) Improvements in or relating to diamond abrasive articles
GB1435467A (en) Method of producing silicon nitride articles
GB1366923A (en) Production of nuclear fuel
GB1450271A (en) Method for producing polycrystalline diamonds and preparation of same