GB974757A - An improved heat resisting material and method for producing it - Google Patents

An improved heat resisting material and method for producing it

Info

Publication number
GB974757A
GB974757A GB2467461A GB2467461A GB974757A GB 974757 A GB974757 A GB 974757A GB 2467461 A GB2467461 A GB 2467461A GB 2467461 A GB2467461 A GB 2467461A GB 974757 A GB974757 A GB 974757A
Authority
GB
United Kingdom
Prior art keywords
nitrogen
silicon
alloy
temperature
firing
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
GB2467461A
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 GB2467461A priority Critical patent/GB974757A/en
Publication of GB974757A publication Critical patent/GB974757A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
    • C22C32/0068—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only nitrides
    • 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)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Ceramic Products (AREA)

Abstract

A method of making an improved heat-resisting material comprises compacting a powdered alloy compounded of silicon and one or more other metallic elements, present to the extent of at least 5% by weight of the silicon, which are unreactive to nitrogen at the subsequent firing temperature and firing the compact in nitrogen at a temperature and for a time sufficient to complete the nitriding reaction between the silicon and the nitrogen. The compacted powder may be fined in nitrogen initially at a temperature below the melting point of the alloy for a time long enough to produce sufficient silicon nitride to bond the particles together, the reaction then being completed by continuing the firing at a temperature above the melting-point of the alloy. The alloys specified are Si-Ni, Si-Co, Si-Ni-Co. In a typical example, a 80% Si/20% Ni alloy powder is fired in nitrogen initially at 950 DEG C. for 50 hours, and then at 1450 DEG C. for 10 hours. Specification 942,082 is referred to.ALSO:A method of making an improved heat resisting material comprises compacting a powdered alloy compounded of silicon and one or more other metallic elements present to the extent of at least 5% by weight of the silicon which are unreactive to nitrogen at the subsequent firing temperature and firing the compact in nitrogen at a temperature and for a time sufficient to complete the nitriding reaction between the silicon and the nitrogen. The compacted powder may be fired in nitrogen initially at a temperature below the melting point of the alloy for a time long enough to produce sufficient silicon nitride to bond the particles together, the reaction then being completed by continuing the firing at a temperature above the melting point of the alloy. The alloys specified are Si-Ni, Si-Co, Si-Ni-Co. In a typical example, a 80% Si/20% Ni alloy powder is fired in nitrogen initially at 950 DEG C. for 50 hours, and then at 1450 DEG C. for 10 hours. Specification 942,082 is referred to.
GB2467461A 1961-07-07 1961-07-07 An improved heat resisting material and method for producing it Expired GB974757A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2467461A GB974757A (en) 1961-07-07 1961-07-07 An improved heat resisting material and method for producing it

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2467461A GB974757A (en) 1961-07-07 1961-07-07 An improved heat resisting material and method for producing it

Publications (1)

Publication Number Publication Date
GB974757A true GB974757A (en) 1964-11-11

Family

ID=10215484

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2467461A Expired GB974757A (en) 1961-07-07 1961-07-07 An improved heat resisting material and method for producing it

Country Status (1)

Country Link
GB (1) GB974757A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4017319A (en) * 1976-01-06 1977-04-12 General Electric Company Si3 N4 formed by nitridation of sintered silicon compact containing boron
US4994418A (en) * 1986-03-17 1991-02-19 Sumitomo Electric Industries, Ltd. Ceramic compact and a process for the production of the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4017319A (en) * 1976-01-06 1977-04-12 General Electric Company Si3 N4 formed by nitridation of sintered silicon compact containing boron
US4994418A (en) * 1986-03-17 1991-02-19 Sumitomo Electric Industries, Ltd. Ceramic compact and a process for the production of the same

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