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Type of publication: Straipsnis kitose duomenų bazėse / Article in other databases (S4)
Field of Science: Fizika / Physics (N002)
Author(s): Milčius, Darius;Širvinskaitė, Vaiva;Norby, T;Haugsrud, R;Dudonis, Julius;Pranevičius, Liudas;Pranevičius, Liudvikas
Title: Coatings of yttria-stabilized zirconia formed by annealing of Y/Zr layers in air
Other Title: Itrio oksidu stabilizuotų cirkonio oksido (YSZ) dangų formavimas kaitinant Y/ZR sluoksnius ore
Is part of: Lithuanian journal of physics. Vilnius : Lietuvos fizikų draugija, 2002, Vol. 42, no. 6
Extent: p. 441-447
Date: 2002
Keywords: Yttria-stabilized zirconia;Y/Zr layers;Oxidation;Mixing
Abstract: Yttria-stabilized zirconia (YSZ) coatings were synthesized using dc magnetron sputter deposition of Y/Zr layers followed by thermal treatment in the range of temperatures 600-1000 degrees C under atmospheric pressure in air. The YSZ coating structure was characterized by X-ray diffraction. The secondary ion mass-spectrometry analysis was used for the recording of depth profiles of the most important elements in coatings and at the interface. Surface roughness and topography was monitored employing atomic force and scanning electron microscopies. The analysis shows that processes on the surface play a dominant role in the synthesis mechanism of YSZ coatings, homogeneous in structure and composition, during the thermal oxidation. The excess of surface chemical potential and surface energy induce intensive intermixing between Y/Zr layers with continuous supply of oxygen through the surface. Under highly nonequilibrium conditions on the surface, the oxygen atoms are driven into grain boundaries of crystallites, and this results in high compressive stress in grains. The stress relaxation initiates the plastic flow of the matrix material with incorporation of oxygen atoms.[...]
Affiliation(s): Kauno technologijos universitetas
Lietuvos energetikos institutas
University of Oslo
Vytauto Didžiojo universitetas
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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