GB919885A - Improvements in hard sintered materials - Google Patents

Improvements in hard sintered materials

Info

Publication number
GB919885A
GB919885A GB4063059A GB4063059A GB919885A GB 919885 A GB919885 A GB 919885A GB 4063059 A GB4063059 A GB 4063059A GB 4063059 A GB4063059 A GB 4063059A GB 919885 A GB919885 A GB 919885A
Authority
GB
United Kingdom
Prior art keywords
tungsten
nitrides
alumina
milled
sieved
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
GB4063059A
Inventor
Edward Moor Trent
David Barrie Comins
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.)
Hard Metal Tools Ltd
Original Assignee
Hard Metal Tools Ltd
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 Hard Metal Tools Ltd filed Critical Hard Metal Tools Ltd
Priority to GB4063059A priority Critical patent/GB919885A/en
Publication of GB919885A publication Critical patent/GB919885A/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
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/111—Fine ceramics
    • C04B35/117—Composites
    • 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
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/32—Carbides; Nitrides; Borides ; Silicides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Civil Engineering (AREA)
  • Ceramic Products (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

The wear resistance of alumina machine tools is increased by the addition of from 4 to 20% by weight (preferably 8 to 10%) of one or more nitrides of the metals Ti, Zr, HF, V, Nb, Ta and Cr. The alumina is ball-milled for several days in a stainless steel ball mill with tungsten carbide balls in water or acetone to obtain small particles. The milled powder is dried, sieved, mixed with a lubricant (e.g. paraffin wax), pressed and sintered at 1600-1750 DEG C. in a tungsten crucible, in vacuo or an inert atmosphere. Impurities (i.e. grinding detritus) may be present in the finished article. According to the Provisional Specification, the nitrides of molybdenum and tungsten may also be used.ALSO:The wear resistance of alumina machine tools is increased by the addition of from 4% to 20% by weight (preferably 8% to 10%) of one or more nitrides of the metals Ti, Zr, Hf, V, Nb, Ta and Cr. The alumina is ball-milled for several days in a stainless steel ball mill with tungsten carbide balls in water or acetone to obtain small particles. The milled powder is dried, sieved, mixed with lubricant (e.3. paraffin wax) pressed and sintered at 1600 DEG -1750 DEG C. in a tungsten cruicible in vacuo or an inert atmosphere. Impurities (i.e. grinding detritus) may be present in the finished article. According to the Provisional Specification the nitrides of molybdenum and tungsten may also be used.
GB4063059A 1959-11-30 1959-11-30 Improvements in hard sintered materials Expired GB919885A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4063059A GB919885A (en) 1959-11-30 1959-11-30 Improvements in hard sintered materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4063059A GB919885A (en) 1959-11-30 1959-11-30 Improvements in hard sintered materials

Publications (1)

Publication Number Publication Date
GB919885A true GB919885A (en) 1963-02-27

Family

ID=10415842

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4063059A Expired GB919885A (en) 1959-11-30 1959-11-30 Improvements in hard sintered materials

Country Status (1)

Country Link
GB (1) GB919885A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4788167A (en) * 1986-11-20 1988-11-29 Minnesota Mining And Manufacturing Company Aluminum nitride/aluminum oxynitride/group IVB metal nitride abrasive particles derived from a sol-gel process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4788167A (en) * 1986-11-20 1988-11-29 Minnesota Mining And Manufacturing Company Aluminum nitride/aluminum oxynitride/group IVB metal nitride abrasive particles derived from a sol-gel process

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