Defect studies of yttria stabilized zirconia with chromia additive

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10129924" target="_blank" >RIV/00216208:11320/12:10129924 - isvavai.cz</a>
Result on the web
<a href="http://www.sciencedirect.com/science/article/pii/S187538921201961X" target="_blank" >http://www.sciencedirect.com/science/article/pii/S187538921201961X</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.phpro.2012.06.024" target="_blank" >10.1016/j.phpro.2012.06.024</a>

Result language
angličtina
Original language name
Defect studies of yttria stabilized zirconia with chromia additive
Original language description
The effect of chromia (Cr2O3) additive on defects in yttria (Y2O3) stabilized zirconia (ZrO2) was examined in the present work. Two kinds of samples were investigated: (i) compacted nanopowders with grain size of 12-23 nm and (ii) sintered ceramics. Defect characterization was performed by high resolution positron lifetime spectroscopy. Because of nanocrystalline grain size positrons in compacted nanopowders probe almost exclusively grain boundaries. It was found that in compacted nanopowders positronsare trapped in vacancy-like misfit defect at grain boundaries and in larger defects situated at triple points. On the other hand, in ceramics positrons are annihilated predominantly in Zr-vacancies in grain interiors. Our results give a strong evidence for segregation of Cr cations at grain boundaries. Positron lifetime results for compacted nanopowders are strongly influenced by the Cr2O3 concentration, while results obtained in ceramics are very similar independently on the Cr2O3 conte
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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