ISSN:
1573-4803
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Maschinenbau
Notizen:
Abstract The systems ZrO2-Ln2O3 have been studied on samples annealed at 600,1170,1450°C in the 0–15 mol % Ln2O3 (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 % Ln2O3, 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, Ln2O3 content and the martensitic transformation temperature, (M s), were determined.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00362139
Permalink