| 摘要 |
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. |
