PURPOSE: To provide a silicon nitride-based sintered compact requiring abrasion resistance at high temperatures and a method for producing the above-mentioned sintered compact.
CONSTITUTION: The subject method is a method for producing a silicon nitride- based sintered compact composed of sintering mixed powder composed of 0.3-5wt.% zirconium oxide powder and/or samarium oxide powder having ≤3μm average particle size with 3-30wt.% silicon carbide whisker, a sintering assistant in an amount of 3-15wt.% based on the silicon nitride powder and the remainder composed substantially of silicon nitride powder at a sintering temperature within the range of 1550-1700°C under ≥200kg/cm2 pressure. Furthermore, the silicon nitride-based sintered compact obtained by the aforementioned method is provided.
MORI KAZUTAKA
HIRATA TAKEHIKO
