Influence of hafnium oxide on the structure and properties of powders and ceramics of the YSZ–HfO2 composition
- 1. Donetsk Institute for Physics and Engineering Named After O.O. Galkin
- 2. Donetsk Institute for Physics and Engineering Named After O.O. Galki
- 3. Institute of Physics, Maria Curie-Skłodowska University
- 4. Joint Institute for Nuclear Research
- 5. Alexandru Ioan Cuza University of Ias
Description
Using the X-ray diffraction, internal friction, 4-point bending, and electron microscopy methods we have studied
the structural compatibility and in䔞uence of Y2O3 and HfO2 dopants addition on the structure and phase
composition of ZrO2 powders and ceramics based on them. The mechanical properties of ZrO2–Y2O3-HfO2 (YSZ)
system have been investigated.
It was determined that the similarity of the structure and properties of yttrium and hafnium oxides is not
complete. The individual structural features of ZrO2, Y2O3, and HfO2 oxides reviled themselves during the for-
mation of ternary systems of the YSZ-Hf type. Studies of the nY2O3–ZrO2 - mHf2O3 system in the range of
hafnium amount from 1 to 15 wt% and yttrium oxide concentration from 0 to 12 mol% showed the possibility of
increase in the values of physical and mechanical properties of common two-component zirconium ceramics by
the forming ternary systems of the YSZ-Hf type.