Defect studies of yttria stabilized zirconia with chromia additive

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Defect studies of yttria stabilized zirconia with chromia additive

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

Defect studies of yttria stabilized zirconia with chromia additive

Popis výsledku anglicky

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

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physics Procedia

ISSN

1875-3892

e-ISSN

—

Svazek periodika

35

Číslo periodika v rámci svazku

July 2012

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

134-139

Kód UT WoS článku

000314358300023

EID výsledku v databázi Scopus

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