Microstructure of Yttria-Stabilized Zirconia Nanomaterials Studied by Positron Annihilation Spectroscopy

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F11%3A10069881" target="_blank" >RIV/00216208:11320/11:10069881 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Microstructure of Yttria-Stabilized Zirconia Nanomaterials Studied by Positron Annihilation Spectroscopy
Original language description
Investigations of several yttria-stabilized zirconia (YSZ) pressure-compacted nanopowders are reported. Positron annihilation spectroscopy is employed as the main experimental tool. The defects associated with grain boundaries (GB''s), the mean grain size and its growth during sintering nanopowders, the nanoporosity, an influence of the material composition on the final microstructure and a possible segregation of different kinds of atoms at GB''s are discussed. The main attention will be focused on therole of chromia addition to YSZ. Positrons are trapped predominantly (i) in the monovacancy-like defects situated along GB''s or (ii) at the triple junctions of GB''s. PAS is then used for estimation of grain size. A small amount of chromia additive isshown to lead to a lower mean grain size of the initial YSZ nanopowders.
Czech name
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Czech description
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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
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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