INFLUENCE OF COMPOSITION ON THE T-]M TRANSFORMATION IN THE SYSTEMS ZRO2-LN(2)O(3) (LN=LA, ND, SM, EU)

被引:50
作者
ANDRIEVSKAYA, ER
LOPATO, LM
机构
[1] Institute of Materials Science Problems, Kiev, 252680
关键词
D O I
10.1007/BF00362139
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The systems ZrO2-Ln(2)O(3) have been studied on samples annealed at 600, 1170, 1450 degrees C in the 0-15 mol % Ln(2)O(3) (where Ln is the rare-earth La, Nd, Sm or Er) range using X-ray diffraction, thermal analysis and dilatometry. The microstructure of annealed samples was examined mainly by electron microscopy. It was found that rare-earth oxides-doped zirconia formed monoclinic, tetragonal, cubic and pyrochlore-type phases. The existing region of the tetragonal phase is 1-15 mol % Ln(2)O(3), which is independent of the species but dependent on the dopant content and temperature. The equilibrium phase diagrams and non-equilibrium diagrams have been deduced. The temperature and composition of eutectoid ZrO2,SS (T)-->ZrO2,SS (M) + Py, as well as interconnection between grain size, Ln(2)O(3) content and the martensitic transformation temperature, (M(s)), were determined.
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收藏
页码:2591 / 2596
页数:6
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