| 摘要 |
PURPOSE:To enhance the strength at high temp. and to contrive the application especially for the gas-turbin blade by forming the alpha/beta mixed phase SIALON sintered body having the specified compositions. CONSTITUTION:This SIALON sintered body is a sintered body consisting of alpha-SIALON phase shown by the general formula with Mx(Si,Al)12(O,N)16 in the ratio of atomic weight (where 0<x<2; M is one or more than 2 kinds of Y, Er, Yb); and beta-SIALON phase shown by the general formula of Si6-zAlzOzN8-z (0<z<=4.2) and a phase composed of at least one or more of Si, Al, O, N, M (M is one or more than 2 kinds of Y, Er, Yb). This sintered body is formed by sintering a molding which satisfies the following specifications, where 8<AlN +Al2O3<16(wt.%), 1.2<=AlN/Al2O3<=3, 3<M2O3<10(wt.%), 74<Si3N4<89(wt.%). |
