Evidence of three types of short range ordered fluorite structure in the (1-x) Y0.15Zr0.85O1.93-x Y0.75Nb0.25O1.75 (0 system

S  Garcia-Martin; M A  Alario-Franco; D P  Fagg; J T S  Irvine

doi:10.1039/b418557a

Evidence of three types of short range ordered fluorite structure in the (1-x) Y0.15Zr0.85O1.93-x Y0.75Nb0.25O1.75 (0 system

S Garcia-Martin, M A Alario-Franco, D P Fagg, J T S Irvine

Research output: Contribution to journal › Article › peer-review

Abstract

The microstructure of the high-temperature quenched oxides of the (1 - x) Y0.15Zr0.85O1.93 - x Y0.75Nb0.25O1.75 (0 &LE; x &LE; 1) system has been investigated by selected area electron diffraction and high resolution transmission electron microscopy. We have found three types of fluorite structure: the x 5 0 end member of the solid solution (Y0.15Zr0.85O1.93) shows evidence of tetragonal fluorite-type structure; we have also observed a modulated fluorite-type structure due to short-range ordering of the oxygen vacancies. The microdomain modulated structure gradually evolves from a distorted pyrochlore-type to a type intermediate between C-type and distorted pyrochlore as x decreases from 1 to 0.3.

Original language	English
Pages (from-to)	1903-1907
Number of pages	5
Journal	Journal of Materials Chemistry
Volume	15
DOIs	https://doi.org/10.1039/b418557a
Publication status	Published - 2005

Keywords

CUBIC STABILIZED ZIRCONIAS
DIFFUSE-SCATTERING
CRYSTAL-CHEMISTRY
PHASE-TRANSITION
RARE-EARTH
DIFFRACTION
ELECTRON
PYROCHLORE

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title = "Evidence of three types of short range ordered fluorite structure in the (1-x) Y0.15Zr0.85O1.93-x Y0.75Nb0.25O1.75 (0 system",

abstract = "The microstructure of the high-temperature quenched oxides of the (1 - x) Y0.15Zr0.85O1.93 - x Y0.75Nb0.25O1.75 (0 &LE; x &LE; 1) system has been investigated by selected area electron diffraction and high resolution transmission electron microscopy. We have found three types of fluorite structure: the x 5 0 end member of the solid solution (Y0.15Zr0.85O1.93) shows evidence of tetragonal fluorite-type structure; we have also observed a modulated fluorite-type structure due to short-range ordering of the oxygen vacancies. The microdomain modulated structure gradually evolves from a distorted pyrochlore-type to a type intermediate between C-type and distorted pyrochlore as x decreases from 1 to 0.3.",

keywords = "CUBIC STABILIZED ZIRCONIAS, DIFFUSE-SCATTERING, CRYSTAL-CHEMISTRY, PHASE-TRANSITION, RARE-EARTH, DIFFRACTION, ELECTRON, PYROCHLORE",

author = "S Garcia-Martin and Alario-Franco, {M A} and Fagg, {D P} and Irvine, {J T S}",

year = "2005",

doi = "10.1039/b418557a",

language = "English",

volume = "15",

pages = "1903--1907",

journal = "Journal of Materials Chemistry",

issn = "0959-9428",

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T1 - Evidence of three types of short range ordered fluorite structure in the (1-x) Y0.15Zr0.85O1.93-x Y0.75Nb0.25O1.75 (0 system

AU - Garcia-Martin, S

AU - Alario-Franco, M A

AU - Fagg, D P

AU - Irvine, J T S

PY - 2005

Y1 - 2005

N2 - The microstructure of the high-temperature quenched oxides of the (1 - x) Y0.15Zr0.85O1.93 - x Y0.75Nb0.25O1.75 (0 &LE; x &LE; 1) system has been investigated by selected area electron diffraction and high resolution transmission electron microscopy. We have found three types of fluorite structure: the x 5 0 end member of the solid solution (Y0.15Zr0.85O1.93) shows evidence of tetragonal fluorite-type structure; we have also observed a modulated fluorite-type structure due to short-range ordering of the oxygen vacancies. The microdomain modulated structure gradually evolves from a distorted pyrochlore-type to a type intermediate between C-type and distorted pyrochlore as x decreases from 1 to 0.3.

AB - The microstructure of the high-temperature quenched oxides of the (1 - x) Y0.15Zr0.85O1.93 - x Y0.75Nb0.25O1.75 (0 &LE; x &LE; 1) system has been investigated by selected area electron diffraction and high resolution transmission electron microscopy. We have found three types of fluorite structure: the x 5 0 end member of the solid solution (Y0.15Zr0.85O1.93) shows evidence of tetragonal fluorite-type structure; we have also observed a modulated fluorite-type structure due to short-range ordering of the oxygen vacancies. The microdomain modulated structure gradually evolves from a distorted pyrochlore-type to a type intermediate between C-type and distorted pyrochlore as x decreases from 1 to 0.3.

KW - CUBIC STABILIZED ZIRCONIAS

KW - DIFFUSE-SCATTERING

KW - CRYSTAL-CHEMISTRY

KW - PHASE-TRANSITION

KW - RARE-EARTH

KW - DIFFRACTION

KW - ELECTRON

KW - PYROCHLORE

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U2 - 10.1039/b418557a

DO - 10.1039/b418557a

M3 - Article

SN - 0959-9428

VL - 15

SP - 1903

EP - 1907

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

ER -

Evidence of three types of short range ordered fluorite structure in the (1-x) Y0.15Zr0.85O1.93-x Y0.75Nb0.25O1.75 (0 system

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Keywords

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