METHOD FOR PRODUCING SINTERED SILICON CARBIDE ARTICLES

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...

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Bibliographische Detailangaben
Hauptverfasser:	MOURI, MASAHIDE, YAMADA, KOICHI, NOMURA, YOSHISABURO
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA METALLURGY REFRACTORIES SLAG TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	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.degree.C. The articles can be produced with increased sintered density and mechanical strength.