BE816211A - Hard wurtzitic boron nitride polycrystals - suitable for cutting tools have improved plasticity and shock resistance - Google Patents

Hard wurtzitic boron nitride polycrystals - suitable for cutting tools have improved plasticity and shock resistance

Info

Publication number
BE816211A
BE816211A BE145317A BE145317A BE816211A BE 816211 A BE816211 A BE 816211A BE 145317 A BE145317 A BE 145317A BE 145317 A BE145317 A BE 145317A BE 816211 A BE816211 A BE 816211A
Authority
BE
Belgium
Prior art keywords
boron nitride
cutting tools
hard
polycrystals
shock resistance
Prior art date
Application number
BE145317A
Other languages
French (fr)
Inventor
V P Alexeevsky
A V Bochko
S S Dzhamarov
D M Karpinos
G G Karjuk
I P Kolomiets
A V Kurdjumov
M S Pivovarov
I N Frantsevich
V V Yarosh
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
Priority claimed from SU1557833A external-priority patent/SU483345A1/en
Priority to GB5859773A priority Critical patent/GB1459758A/en
Priority to SE7317083A priority patent/SE399053B/en
Priority to US425834A priority patent/US3876751A/en
Priority claimed from GB5858773A external-priority patent/GB1453943A/en
Priority to FR7406213A priority patent/FR2261975B1/fr
Priority claimed from FR7406213A external-priority patent/FR2261975B1/fr
Priority to DE2414281A priority patent/DE2414281C3/en
Application filed filed Critical
Priority to BE145317A priority patent/BE816211A/en
Publication of BE816211A publication Critical patent/BE816211A/en

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
    • C04B35/583—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 boron nitride
    • C04B35/5831—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 boron nitride based on cubic boron nitrides or Wurtzitic boron nitrides, including crystal structure transformation of powder
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
    • C01B21/064—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with boron
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/10—Solid density

Abstract

Polycrystals of wartzitic boron nitride are prepared by hot pressing a mixt. contg. as one of its components, boron nitride of wurtzite structure with a high proportion of defects, obtd. by use of a shock wave, together with at least 50 wt.% of graphitic boron nitride, also treated by shock wave but without becoming transformed, in the region of the boron nitride equilibrium diagram limited by the equilibrium curves of the graphite dense material transition and the wurtzite/cubic transition. The polycrystals although hard and suitable for cutting tools, retain sufficient plasticity to be less subject to shock damage.
BE145317A 1972-12-18 1974-06-12 Hard wurtzitic boron nitride polycrystals - suitable for cutting tools have improved plasticity and shock resistance BE816211A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB5859773A GB1459758A (en) 1972-12-18 1973-12-18 Method of producing polycrystalline boron nitride
SE7317083A SE399053B (en) 1972-12-18 1973-12-18 METHOD OF MANUFACTURING POLYCRISTALLINE BORNITRID
US425834A US3876751A (en) 1972-12-18 1973-12-18 Method for producing polycrystalline boron nitride
FR7406213A FR2261975B1 (en) 1972-12-18 1974-02-22
DE2414281A DE2414281C3 (en) 1972-12-18 1974-03-25 Process for the production of polycrystalline bronitride
BE145317A BE816211A (en) 1972-12-18 1974-06-12 Hard wurtzitic boron nitride polycrystals - suitable for cutting tools have improved plasticity and shock resistance

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
SU1557833A SU483345A1 (en) 1972-12-18 1972-12-18 The method of obtaining a compact material from boron nitride
GB5858773A GB1453943A (en) 1972-12-18 1973-12-18 Incandescent lamp and method of amnufacturing the same
FR7406213A FR2261975B1 (en) 1972-12-18 1974-02-22
DE2414281A DE2414281C3 (en) 1972-12-18 1974-03-25 Process for the production of polycrystalline bronitride
BE145317A BE816211A (en) 1972-12-18 1974-06-12 Hard wurtzitic boron nitride polycrystals - suitable for cutting tools have improved plasticity and shock resistance
BE816211 1974-06-12

Publications (1)

Publication Number Publication Date
BE816211A true BE816211A (en) 1974-12-12

Family

ID=27543006

Family Applications (1)

Application Number Title Priority Date Filing Date
BE145317A BE816211A (en) 1972-12-18 1974-06-12 Hard wurtzitic boron nitride polycrystals - suitable for cutting tools have improved plasticity and shock resistance

Country Status (1)

Country Link
BE (1) BE816211A (en)

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: INSTITUT PROBLEM MATERIALOVEDENIA AKADEMII NAUK U

Effective date: 19910630

Owner name: POLTAVSKY ZAVOD ISKUSSTVENNYKH ALMAZOV I ALMAZNOG

Effective date: 19910630