GB976468A - - Google Patents

Info

Publication number
GB976468A
GB976468A GB3648260A GB3648260A GB976468A GB 976468 A GB976468 A GB 976468A GB 3648260 A GB3648260 A GB 3648260A GB 3648260 A GB3648260 A GB 3648260A GB 976468 A GB976468 A GB 976468A
Authority
GB
United Kingdom
Prior art keywords
sic
alloy
volume
impregnating
elements
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
GB3648260A
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.)
Kanthal AB
Original Assignee
Kanthal AB
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 Kanthal AB filed Critical Kanthal AB
Publication of GB976468A publication Critical patent/GB976468A/en
Expired legal-status Critical Current

Links

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
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • C04B35/56Shaped 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
    • C04B35/565Shaped 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
    • C04B35/573Shaped 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 obtained by reaction sintering or recrystallisation
    • 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
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5053Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials non-oxide ceramics
    • C04B41/5062Borides, Nitrides or Silicides
    • C04B41/5071Silicides
    • 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
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81Coating or impregnation
    • C04B41/85Coating or impregnation with inorganic materials
    • C04B41/87Ceramics
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/02Details
    • H05B3/06Heater elements structurally combined with coupling elements or holders
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/10Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • H05B3/148Silicon, e.g. silicon carbide, magnesium silicide, heating transistors or diodes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Ceramic Products (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

A dense oxidation proof heat-resistant body is formed by impregnating a preliminary porous body consisting of 30-90% by volume of SiC with 10-70% by volume of an alloy principally comprising molybdenum silicide. The impregnating alloy may also contain 1-15% silicon alloys of members of the groups W, Cr, Ta, Nb, V, Hf, Zr or Ti together with up to 30% by weight of one or more of the elements Al, Be, Ca, Ce, Co, Cu, Mg, Fe, Mn, Ni, C and B. Minor amounts of borides, aluminides, and titanides of certain highmelting metals may be included in the impregnating alloy. The preliminary porous body is shaped from one or more of the following, hexagonal SiC, cubic SiC, graphite, amorphous carbon, and carbon containing carbonizable material, in the case of the three latter substances the SiC is formed in situ during the impregnation process. The final body may have an optional oxide component comprising up to 20% volume of mixed oxides selected from the elements Al, Be, Ce, Cr, Hf, Mg, Ti, Si, Zr, Th, Y and other rare earth metals. In an example, the SiC body impregnated with the molybdenum silicide alloy is heated in air to form a film of SiO2 on the surface and so seal the pores. Generally, the bodies are prepared by coating the porous SiC body with the required amount of alloy powder held in position by a paper binder and heating in a carbonizing atmosphere to effect infiltration of the alloy into the pore space, the residual porous cake loosely adhering to the surface after impregnation being subsequently removed. Examples are given of the preparation of hollow and solid electrical resistance heating elements. Reference has been directed by the Comptroller to Specification 936,118.ALSO:A dense oxidation-proof heat-resistant body is formed by impregnating a preliminary porous body consisting of 30-90% by volume of SiC with 10-70% by volume of an alloy principally comprising molybdenum silicide. The impregnating alloy may also contain 1-15% silicon alloys of members of the group W, Cr, Ta, Nb, V, Hf, Zr or Ti together with up to 30% by weight of one or more of the elements Al, Be, Ca, Ce, Co, Cu, Mg, Fe, Mn, Ni, C and B. Minor amounts of borides, aluminides, and titanides of certain high melting metals may be included in the impregnating alloy. The preliminary porous body is shaped from one or more of the following, hexagonal SiC, cubic SiC, graphite, amorphous carbon, and carbon containing carbonizable material, in the case of the three latter substances the SiC is formed in situ during the impregnation process. The final body may have an optional oxide component comprising up to 20% volume of mixed oxides selected from the elements Al, Be, Ce, Cr. Hf, Mg, Ti, Si, Zr, Th, Y and other rare earth metals. In an example, the SiC body impregnated with the molybdenum silicide alloy is heated in air to form a film of SiO2 on the surface and so seal the pores. Generally the bodies are prepared by coating the porous SiC body with the required amount of alloy powder held in position by a paper binder and heating in a carbonizing atmosphere to effect infiltration of the alloy into the pore space, the residual porous cake loosely adhering to the surface after impregnation being subsequently removed. Examples are given of the preparation of hollow and solid electrical resistance heating elements. Reference has been directed by the Comptroller to Specification 936,118.
GB3648260A 1960-03-02 1960-10-24 Expired GB976468A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1007960 1960-03-02

Publications (1)

Publication Number Publication Date
GB976468A true GB976468A (en) 1964-11-25

Family

ID=31185896

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3648260A Expired GB976468A (en) 1960-03-02 1960-10-24

Country Status (1)

Country Link
GB (1) GB976468A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125066A (en) * 1982-07-29 1984-02-29 Mamoru Omori Sintered silicon carbide molding and process for production thereof
GB2142343A (en) * 1983-06-30 1985-01-16 Japan Metals & Chem Co Ltd Composite silicon carbide sintered shapes and their manufacture
GB2163364A (en) * 1984-08-22 1986-02-26 Hutschenreuther Exhaust gas catalysts and processes for the production thereof
CN108934087A (en) * 2017-05-26 2018-12-04 Lg电子株式会社 Carbon heating body
CN108966379A (en) * 2017-05-26 2018-12-07 Lg电子株式会社 The manufacturing method of carbon heater
US11097985B2 (en) 2017-05-10 2021-08-24 Lg Electronics Inc. Carbon composite composition and carbon heater manufactured using the same

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125066A (en) * 1982-07-29 1984-02-29 Mamoru Omori Sintered silicon carbide molding and process for production thereof
GB2142343A (en) * 1983-06-30 1985-01-16 Japan Metals & Chem Co Ltd Composite silicon carbide sintered shapes and their manufacture
GB2163364A (en) * 1984-08-22 1986-02-26 Hutschenreuther Exhaust gas catalysts and processes for the production thereof
FR2569355A1 (en) * 1984-08-22 1986-02-28 Hutschenreuther EXHAUST GAS CATALYST AND METHOD FOR MANUFACTURING THE SAME
US11097985B2 (en) 2017-05-10 2021-08-24 Lg Electronics Inc. Carbon composite composition and carbon heater manufactured using the same
CN108934087A (en) * 2017-05-26 2018-12-04 Lg电子株式会社 Carbon heating body
CN108966379A (en) * 2017-05-26 2018-12-07 Lg电子株式会社 The manufacturing method of carbon heater
US11096249B2 (en) 2017-05-26 2021-08-17 Lg Electronics Inc. Carbon heating element and method for manufacturing a carbon heating element
CN108966379B (en) * 2017-05-26 2021-12-24 Lg电子株式会社 Method for manufacturing carbon heater
CN108934087B (en) * 2017-05-26 2022-06-14 Lg电子株式会社 Carbon heating element

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