GB848985A - Improvements in or relating to the production of heat resistant bodies of molybdenumdisilicide - Google Patents

Improvements in or relating to the production of heat resistant bodies of molybdenumdisilicide

Info

Publication number
GB848985A
GB848985A GB32971/57A GB3297157A GB848985A GB 848985 A GB848985 A GB 848985A GB 32971/57 A GB32971/57 A GB 32971/57A GB 3297157 A GB3297157 A GB 3297157A GB 848985 A GB848985 A GB 848985A
Authority
GB
United Kingdom
Prior art keywords
rods
bentonite
heat resistant
silicide
porosity
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
GB32971/57A
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 GB848985A publication Critical patent/GB848985A/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
    • 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
    • C04B35/58085—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 silicides
    • C04B35/58092—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 silicides based on refractory metal silicides
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303—Inorganic additives
    • C04B35/6316—Binders based on silicon compounds
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/18—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on silicides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Ceramic Products (AREA)
  • Resistance Heating (AREA)

Abstract

Heat resistant bodies of molybdenum disilicide are produced by mixing the finely divided disilicide with 0.2-20% by weight of a finely divided plastic clay of the montmorillonite group suspended in a polar liquid such as water, shaping the mixture, sintering at 1000-1400 DEG C and then heating in the presence of oxygen at about 1600 DEG C. Clay, which may be bentonite, is preferably used in an amount depending inversely on the grain size of the silicide which should be less than 10 microns. The silicide may be mixed and kneaded under vacuum with bentonite and water, extruded to rods pre-sintered under pure hydrogen at 1000 DEG C, and sintered at 1200-1400 DEG C under pure hydrogen after which the rods have a porosity of 15-20%. The rods are then heated for a few minutes in air at 1600 DEG C. At this temperature the rods may be subjected to a shaping operation. The product has a porosity of 0-5%. A typical bentonite used has the composition 60% SiO2, 20% Al2O3, 15% H2O and 5% impurities. The final product may have a composition 57.7% Mo, 34.9% Si, 0.7% Al, 0.7% Fe, 5.8% O and 0.2% impurities
GB32971/57A 1956-11-02 1957-10-22 Improvements in or relating to the production of heat resistant bodies of molybdenumdisilicide Expired GB848985A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9962 1956-11-02

Publications (1)

Publication Number Publication Date
GB848985A true GB848985A (en) 1960-09-21

Family

ID=45804251

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32971/57A Expired GB848985A (en) 1956-11-02 1957-10-22 Improvements in or relating to the production of heat resistant bodies of molybdenumdisilicide

Country Status (2)

Country Link
DE (2) DE1072180C2 (en)
GB (1) GB848985A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010128935A1 (en) * 2009-05-05 2010-11-11 Sandvik Intellectual Property Ab Heating element

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1243078B (en) * 1961-11-09 1967-06-22 Sigri Elektrographit Gmbh Sintered bodies, preferably for use as a heating element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010128935A1 (en) * 2009-05-05 2010-11-11 Sandvik Intellectual Property Ab Heating element
CN102405198A (en) * 2009-05-05 2012-04-04 山特维克知识产权股份有限公司 Heating element

Also Published As

Publication number Publication date
DE1072180B (en) 1959-12-24
DE1072180C2 (en) 1970-07-02

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