| 摘要 |
PURPOSE:To obtain electroconductive sialon sintered product having high flexural strength and special and complicated shapes by sintering formed products from a sintering auxiliary-containing starting substances for beta-type sialon and Ti or a nitride and Si under specific conditions. CONSTITUTION:Starting substances for beta-type sialon containing a sintering auxiliary is mixed with 25 to 60vol.% of at least one selected from Ti and Zr nitride, 0.2 to 3.5vol.% of Si and the mixture is formed. The formed products are kept at 1,550 to 1,850 deg.C for 1 or more hours in a nitrogen atmosphere at normal or elevated pressure, then sintered at 1,700 to 1840 deg.C over 2 hours to give the subject sintered products. The use of Ti or Zr nitride is due to their high electroconductivities and high melting points with reduced adverse effects on sialon sintering. Si is readily wettable with the melt formed in sialon sintering to give a texture of higher homogeneity and reduced defects. Thus. the product gives a high strength matching those in hot press or HIP processing. |
