Effect of Ceria Doping on the Mechanical Properties and Phase Stability of Partially Samaria-Stabilized Zirconia Crystals
Mikhail Borik,
Artem Chislov,
Alexej Kulebyakin,
Elena Lomonova,
Filipp Milovich,
Valentina Myzina,
Vladimir Pankratov,
Alexandr Poselennov,
Polina Ryabochkina,
Natalia Sidorova,
Nataliya Tabachkova,
Denis Zakharov,
Dmitry Kiselev
Affiliations
Mikhail Borik
Prokhorov General Physics Institute of the Russian Academy of Sciences, 38 Vavilov Str., 119991 Moscow, Russia
Artem Chislov
Prokhorov General Physics Institute of the Russian Academy of Sciences, 38 Vavilov Str., 119991 Moscow, Russia
Alexej Kulebyakin
Prokhorov General Physics Institute of the Russian Academy of Sciences, 38 Vavilov Str., 119991 Moscow, Russia
Elena Lomonova
Prokhorov General Physics Institute of the Russian Academy of Sciences, 38 Vavilov Str., 119991 Moscow, Russia
Filipp Milovich
Department of Materials Science of Semiconductors and Dielectrics, National University of Science and Technology (MISIS), 4 Leninskiy Prospekt, 119049 Moscow, Russia
Valentina Myzina
Prokhorov General Physics Institute of the Russian Academy of Sciences, 38 Vavilov Str., 119991 Moscow, Russia
Vladimir Pankratov
Institute of Solid State Physics, University of Latvia, 8 Kengaraga, LV-1063 Riga, Latvia
Alexandr Poselennov
Department of Materials Science of Semiconductors and Dielectrics, National University of Science and Technology (MISIS), 4 Leninskiy Prospekt, 119049 Moscow, Russia
Polina Ryabochkina
Institute of High Technologies and New Materials, Ogarev Mordovia State University, 68 Bolshevistskaya Str., 430005 Saransk, Russia
Natalia Sidorova
Institute of High Technologies and New Materials, Ogarev Mordovia State University, 68 Bolshevistskaya Str., 430005 Saransk, Russia
Nataliya Tabachkova
Prokhorov General Physics Institute of the Russian Academy of Sciences, 38 Vavilov Str., 119991 Moscow, Russia
Denis Zakharov
Prokhorov General Physics Institute of the Russian Academy of Sciences, 38 Vavilov Str., 119991 Moscow, Russia
Dmitry Kiselev
Department of Materials Science of Semiconductors and Dielectrics, National University of Science and Technology (MISIS), 4 Leninskiy Prospekt, 119049 Moscow, Russia
The effect of ceria doping of (ZrO2)1−x(Sm2O3)x crystals on their phase composition, microhardness and fracture toughness was studied. The (ZrO2)0.995−x(Sm2O3)x(CeO2)0.005 crystals (where x = 0.032, 0.037 and 0.04) were grown using directional melt crystallization in a cold crucible. The mechanical properties, such as microhardness and fracture toughness, were explored using Vickers indentation. It was shown that the (ZrO2)0.995−x(Sm2O3)x(CeO2)0.005 solid-solution crystals contained both Ce4+ and Ce3+ ions. Phase analysis data suggested that CeO2 doping increased the tetragonality degree of the transformable t phase and reduced the tetragonality degree of the non-transformable t’ phase as compared to the (ZrO2)1−x(Sm2O3)x crystals. As a result, the t→m phase transition triggered by the indentation-induced stress in the CeO2-doped crystals was more intense and covered greater regions. CeO2 doping of the solid solutions increased the fracture toughness of all the crystals studied, whereas the microhardness of the crystals changed only slightly. CeO2 doping of the (ZrO2)1−x(Sm2O3)x solid solutions in the experimental concentration range did not improve the high-temperature phase stability of the crystals and did not prevent high-temperature degradation of their fracture toughness.
