The relationship between composition and microstructure of a'-sialons was studied. The typical microstructure of a' -sialon ceramics consists of a crystalline phase of sialons and a small fraction of amorphous phase at grain boundaries. The addition of La2O3 to the starting mixtures promotes the incorporation of yttrium ions into the crystal lattice and also results in the formation of many crystal defects in the a' grains. This result suggests that a small amount of La3+ ions, together with yttrium cations, can enter the lattice of a' -sialons.
|Title of host publication||Euro-Ceramics 2 : Proceedings of the 2nd European Ceramic Society Conference, 11-14 sep. 1991, Augsburg|
|Editors||G. Ziegler, H. Hausner|
|Place of Publication||Augsburg|
|Publisher||Deutsche Keramische Gesellschaft|
|Publication status||Published - 1991|