Lu-Doped Si3N4 Ceramics

The creep resistance of silicon nitride-containing Lu-doped additives was shown to be three to five orders of magnitude greater than that of earlier grades containing Y- and / or Yb-additives [74, 75]. This material has the potential for prolonged operation at 

The specimen processed by sinter-forging with an anisotropic microstructure exhibited superior high-temperature strengths of 696 and 570 MPa at 1500 and 1600 °C, respectively, [77]. The starting Si3N4 powder contained 8 wt% LU2O3 and 2 wt % Si02. 

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