Low compressibility carbon nitrides

Details Low compressibility carbon nitrides Low compressibility carbon nitrides

C - Chemistry, Metallurgy

01

B

C01B 21/082 (2006.01) C01B 21/06 (2006.01) C04B 35/58 (2006.01)

Patent

CA 2240860

A cubic form of C3N4 with a zero-pressure bulk modulus exceeding that of diamond. Also a process for preparing such product which comprises combining carbon and nitrogen at a pressure of 120,000 to 800,000 atmosphere and a temperature of 1000-3000°C. Carbon particles may be immersed in liquid nitrogen and the mixture heated by a laser beam followed by quenching. The nitride of the invention is considered to be harder than diamond and, therefore, suitable for use as a superabrasive composition and for wear-resistant coatings.

L'invention décrit une forme cubique de C3N4 ayant un module de compressibilité à pression 0 dépassant celui du diamant. L'invention décrit également un procédé de préparation d'un tel produit, ce procédé consistant à combiner du carbone et de l'azote à une pression comprise entre 120000 et 800000 atmosphère et une te mpérature comprise entre 1000 et 3000 DEG C. Des particules de carb one peuvent être immergées dans de l'azote liquide et le mélange peut être chauffé à l'aide d'un rayon laser, puis subir une extinction.

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