Cubic boron nitride - from hexagonal boron nitride and transition metal cpd initiators for abrasive tools

Cubic BN is made from a mixture containing hexagonal BN, and, as initiators, one or more borides nitrides, silicides, or germanides of transition metals of Groups IV, V, VI, and VIII at pressure >55 kilobars at above 1500 degrees C. There may be 40-2% initiators and the reaction time is 2-5 mins....

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Bibliographische Detailangaben
Hauptverfasser:	V.V. DIGONSKY, Y.A. KALASHNIKOV, E.M. FEKLICHEV ETI.V. NIKOLSKAYA, I.D. MAKEDON, N.E. FILONENKO-BORODICH, M.A. VARZANOV, L.F. VERESCHAGIN, V.M. DAVIDENKO, L.I. FELDGUN, V.E. SVINTITSKIKH, M.I. SOKHOR
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS COMPOUNDS THEREOF CONCRETE DYES INORGANIC CHEMISTRY LIME, MAGNESIA MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-METALLIC ELEMENTS PAINTS POLISHES REFRACTORIES SLAG TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	Cubic BN is made from a mixture containing hexagonal BN, and, as initiators, one or more borides nitrides, silicides, or germanides of transition metals of Groups IV, V, VI, and VIII at pressure >55 kilobars at above 1500 degrees C. There may be 40-2% initiators and the reaction time is 2-5 mins. The product has high mechanical resistance and stability in humid media, and is used for abrasive tools.