ZIRCONIUM CARBONITRIDE-BASED CERAMIC SINTERED BODY

PURPOSE:To obtain a Zr(CN)-based ceramic sintered body having high strength, high hardness, high wear resistance and high density and useful as a cutting tool material, etc., by mixing one or more among Cr3C2, Cr7C2 and Cr4C with Zr(CN) in a prescribed ratio and sintering the mixture. CONSTITUTION:Z...

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Main Authors WATANABE TADAHIKO, SHOBU KAZUHISA, KAI YUKIO, MICHITSU TAKESHI, YAMAMOTO HIDEKI, YAGISHITA TADASHI, SUDO HIDEKAZU
Format Patent
LanguageEnglish
Published 03.03.1989
Subjects
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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Summary:PURPOSE:To obtain a Zr(CN)-based ceramic sintered body having high strength, high hardness, high wear resistance and high density and useful as a cutting tool material, etc., by mixing one or more among Cr3C2, Cr7C2 and Cr4C with Zr(CN) in a prescribed ratio and sintering the mixture. CONSTITUTION:Zr(CalphaNbeta) is obtd. by dissolving N2 in ZrC so as to regulate the ratio between carbon and nitrogen (alpha:beta) to (10-90):(90-10). Powder of the Zr(CalphaNbeta) having <=2mum average particle size is mixed with 20-99wt.% powder of one or more among Cr3C2, Cr7C2 and Cr4C having <=2mum average particle size. The powdery mixture is filled into dies such as graphite dies and sintered by heating at 1,300-1,700 deg.C for 10-20min under 50-300kg/cm pressure applied to the dies in a neutral or reducing atmosphere such as Ar.
Bibliography:Application Number: JP19870214906