About: Defects and sintering-induced diffusion processes in yttria-stabilised zirconia nanomaterials studied by positron annihilation spectroscopy

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About: Defects and sintering-induced diffusion processes in yttria-stabilised zirconia nanomaterials studied by positron annihilation spectroscopy Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://www.scientific.net/DF.1.155
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. 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. (en)
Title	Defects and sintering-induced diffusion processes in yttria-stabilised zirconia nanomaterials studied by positron annihilation spectroscopy Defects and sintering-induced diffusion processes in yttria-stabilised zirconia nanomaterials studied by positron annihilation spectroscopy (en)
skos:prefLabel	Defects and sintering-induced diffusion processes in yttria-stabilised zirconia nanomaterials studied by positron annihilation spectroscopy Defects and sintering-induced diffusion processes in yttria-stabilised zirconia nanomaterials studied by positron annihilation spectroscopy (en)
skos:notation	RIV/00216208:11320/14:10290420!RIV15-MSM-11320___
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP108/11/1396)
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Melikhova, Oksana Procházka, Ivan Čížek, Jakub
http://linked.open.../riv/druhVysledku	C - Kapitola v knize
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	10002
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/14:10290420
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Zirconia; Sintering; Positron Annihilation; Porosity; Nanopowder (en)
http://linked.open.../riv/klicoveSlovo	Zirconia Sintering Porosity Nanopowder Positron Annihilation
http://linked.open...ontrolniKodProRIV	[A65EA8835460]
http://linked.open...i/riv/mistoVydani	Switzerland
http://linked.open...vEdiceCisloSvazku	1
http://linked.open...i/riv/nazevZdroje	Diffusion in Advanced Materials
http://linked.open...in/vavai/riv/obor	JH
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...v/pocetStranKnihy	218 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Effect of substitutional elements and grain boundaries on properties of nanocrystalline zirconia-based materials
http://linked.open...UplatneniVysledku	2014
http://linked.open...iv/tvurceVysledku	Anwand, Wolfgang Melikhova, Oksana Procházka, Ivan Čížek, Jakub Danilenko, Igor A. Konstantinova, Tetyana E.
number of pages	19 (xsd:int)
http://bibframe.org/vocab/doi	10.4028/www.scientific.net/DF.1.155
http://purl.org/ne...btex#hasPublisher	TRANS TECH PUBLICATIONS LTD
https://schema.org/isbn	978-3-03835-081-1
http://localhost/t...ganizacniJednotka	11320

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