Method for producing sintered silicon carbide articles

Details Method for producing sintered silicon carbide articles Method for producing sintered silicon carbide articles

C - Chemistry, Metallurgy

04

B

25/128

C04B 35/56 (2006.01) C04B 35/565 (2006.01)

Patent

CA 1252612

ABSTRACT Production of sintered silicon carbide articles by mixing a tar pitch in an amount to provide 4.2-6 parts by weight of carbon after being carbonized and boron or a boron compound in an amount corresponding to 0.03 - 0.15 parts by weight of boron content as densification aids with 100 parts by weight of a finely divided silicon carbide powder, shaping the resulting mixture, and sintering the shaped article in an inert atmosphere at a temperature of from 1900 to 2300°C. The articles can be produced with increased sintered density and mechanical strength.

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