Defects and sintering-induced diffusion processes in yttria-stabilised zirconia nanomaterials studied by positron annihilation spectroscopy
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10290420" target="_blank" >RIV/00216208:11320/14:10290420 - isvavai.cz</a>
Result on the web
<a href="http://www.scientific.net/DF.1.155" target="_blank" >http://www.scientific.net/DF.1.155</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.4028/www.scientific.net/DF.1.155" target="_blank" >10.4028/www.scientific.net/DF.1.155</a>
Alternative languages
Result language
angličtina
Original language name
Defects and sintering-induced diffusion processes in yttria-stabilised zirconia nanomaterials studied by positron annihilation spectroscopy
Original language description
In the present work, zirconia (ZrO2) nanopowders doped with yttria (Y2O3) and chromia (Cr2O3) were prepared by a co-precipitation technique. The nanopowders were then subjected to a calcination and a successive sintering at elevated temperatures up to 1500 C. The nanostructures in these nanomaterials were characterized by positron annihilation spectroscopy (positron lifetimes and Doppler broadening measurements) which is a non-destructive technique with a high sensitivity to atomic-scale open-volume defects. It was found that the zirconia-based nanomaterials studied contain vacancy-like defects and nano-scale pores. Diffusion processes induced in these nanomaterials by sintering were investigated also by depth sensitive positron annihilation studies using a variable energy slow positron beam. Sintering was found to cause intensive grain growth and a removal of porosity by a migration of pores from the sample interior toward its surface.
Czech name
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Czech description
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Classification
Type
C - Chapter in a specialist book
CEP classification
JH - Ceramics, fire-proof materials and glass
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GAP108%2F11%2F1396" target="_blank" >GAP108/11/1396: Effect of substitutional elements and grain boundaries on properties of nanocrystalline zirconia-based materials</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Book/collection name
Diffusion in Advanced Materials
ISBN
978-3-03835-081-1
Number of pages of the result
19
Pages from-to
155-172
Number of pages of the book
218
Publisher name
TRANS TECH PUBLICATIONS LTD
Place of publication
Switzerland
UT code for WoS chapter
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