PRODUCTION OF SINTERED SIC BODY

PURPOSE:To easily obtain a sintered SiC body which is excellent in wear resistance and suitable for a mechanical seal and has high density by blending a P-Al-C-based sintering auxiliary with SiC powder, molding this mixture and sintering the molded body at ordinary pressure and thereafter furthermor...

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Bibliographic Details
Main Authors MORIGUCHI TOSHIKAZU, HATAKEYAMA FUMIO
Format Patent
LanguageEnglish
Published 01.05.1990
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 easily obtain a sintered SiC body which is excellent in wear resistance and suitable for a mechanical seal and has high density by blending a P-Al-C-based sintering auxiliary with SiC powder, molding this mixture and sintering the molded body at ordinary pressure and thereafter furthermore performing HIP treatment. CONSTITUTION:A sintering auxiliary consisting of B-contg. compd. (e.g., boron powder), C-contg. compd. (e.g., phenol resin and carbon black) and Al-contg. compd. (e.g., aluminum powder) is blended with SiC powder. As loadings thereof, about 0.03-5wt.% B, about 0.1-5wt.% Al and about 0.3-5wt.% are properly used. Then a primary binder such as PVA is added and the mixture is molded and this molded body is sintered at about 1800-2300 deg.C at ordinary pressure in the nonoxidative atmosphere. Then a sintered SiC body is obtained by furthermore performing HIP treatment at 1600-2200 deg.C.
Bibliography:Application Number: JP19880269669