Polykrystallinske abrasive materialer og fremgangsmate for produksjon av disse

• Main Authors: DAVIES GEOFFREY JOHN, MYBURGH JOHANNES LODEWIKUS, MOCHUBELE ANNA EMELA, CAN ANTOINETTE
• Format: Patent
• Language: Norwegian
• Published: 08.01.2007
• Subjects: ADHESIVES; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DYES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS; INORGANIC CHEMISTRY; LIME, MAGNESIA; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; POLISHES; PREPARATION OF CARBON BLACK; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; TREATMENT OF NATURAL STONE

Fremgangsmåte for fremstilling av polykrystallinske abrasive elementer bestående av mikron, sub-mikron eller nano-størrelse ultraharde abrasiver dispergert i mikron, sub-mikron eller nano-størrelse matrisematerialer. Et antall ultraharde, abrasive partikler med vitreofile overflater belegges med et matriseforløpermateriale og blir så behandlet for å gjøre dem egnet for sintring. Matriseforløpermaterialet kan omdannes til en oksid, nitrid, karbid, oksynitrid, oksykarbid eller karbonitrid eller en elementær form derav. De belagte ultraharde, abrasive partikler konsolideres og sintres under et trykk og en temperatur ved hvilken de er krystallografisk eller termodynamisk stabile. A method of manufacturing polycrystalline abrasive elements consisting of micron, sub-micron or nano-sized ultrahard abrasives dispersed in micron, sub-micron or nano-sized matrix materials. A plurality of ultrahard abrasive particles having vitreophilic surfaces are coated with a matrix precursor material and then treated to render them suitable for sintering. The matrix precursor material can be converted to an oxide, nitride, carbide, oxynitride, oxycarbide, or carbonitride, or an elemental form thereof. The coated ultrahard abrasive particles are consolidated and sintered at a pressure and temperature at which they are crystallographically or thermodynamically stable.