Heavy-ion irradiation effects in Gd2(Ti2-xZrx)O7 pyrochlores

B. D. Begg, N. J. Hess, D. E. McCready, S. Thevuthasan, W. J. Weber

Research output: Contribution to journalArticle

130 Citations (Scopus)

Abstract

Gd2(Ti2-xZrx)O7 samples with 0≤x≤1.5 were single-phase and pyrochlore structured after sintering at 1600 °C in air. The Gd2Zr2O7 (x = 2) end member predominantly displayed an anion deficient-fluorite structure. Raman spectroscopy indicated that the level of short-range fluorite-like disorder in the unirradiated Gd2(Ti2-xZrx)O7 samples increased significantly as Zr was substituted for Ti, despite the retention of a long-range pyrochlore structure for samples with 0≤x≤1.5. Glancing-incidence X-ray diffraction indicated that pyrochlores with an ionic radii ratio rΛ/rB≤1.52(x≥1.5) were transformed into a radiation resistant defect-fluorite structure after irradiation at room temperature with 2 MeV Au2+ to a fluence of 5 ions/nm2. As the ionic radii ratio of the pyrochlore increased beyond rΛ/rB>1.52, the defect-fluorite structure became increasingly unstable with respect to the amorphous state under identical irradiation conditions.

Original languageEnglish
Pages (from-to)188-193
Number of pages6
JournalJournal of Nuclear Materials
Volume289
Issue number1-2
DOIs
Publication statusPublished - Feb 2001
Externally publishedYes

Fingerprint

Heavy Ions
Fluorspar
fluorite
Ion bombardment
ion irradiation
Heavy ions
heavy ions
Irradiation
Defects
irradiation
radii
defects
Anions
Raman spectroscopy
sintering
fluence
Negative ions
Sintering
incidence
disorders

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Begg, B. D., Hess, N. J., McCready, D. E., Thevuthasan, S., & Weber, W. J. (2001). Heavy-ion irradiation effects in Gd2(Ti2-xZrx)O7 pyrochlores. Journal of Nuclear Materials, 289(1-2), 188-193. https://doi.org/10.1016/S0022-3115(00)00696-6

Heavy-ion irradiation effects in Gd2(Ti2-xZrx)O7 pyrochlores. / Begg, B. D.; Hess, N. J.; McCready, D. E.; Thevuthasan, S.; Weber, W. J.

In: Journal of Nuclear Materials, Vol. 289, No. 1-2, 02.2001, p. 188-193.

Research output: Contribution to journalArticle

Begg, BD, Hess, NJ, McCready, DE, Thevuthasan, S & Weber, WJ 2001, 'Heavy-ion irradiation effects in Gd2(Ti2-xZrx)O7 pyrochlores', Journal of Nuclear Materials, vol. 289, no. 1-2, pp. 188-193. https://doi.org/10.1016/S0022-3115(00)00696-6
Begg, B. D. ; Hess, N. J. ; McCready, D. E. ; Thevuthasan, S. ; Weber, W. J. / Heavy-ion irradiation effects in Gd2(Ti2-xZrx)O7 pyrochlores. In: Journal of Nuclear Materials. 2001 ; Vol. 289, No. 1-2. pp. 188-193.
@article{ef8b9d2c65cc4030807184bef69421fe,
title = "Heavy-ion irradiation effects in Gd2(Ti2-xZrx)O7 pyrochlores",
abstract = "Gd2(Ti2-xZrx)O7 samples with 0≤x≤1.5 were single-phase and pyrochlore structured after sintering at 1600 °C in air. The Gd2Zr2O7 (x = 2) end member predominantly displayed an anion deficient-fluorite structure. Raman spectroscopy indicated that the level of short-range fluorite-like disorder in the unirradiated Gd2(Ti2-xZrx)O7 samples increased significantly as Zr was substituted for Ti, despite the retention of a long-range pyrochlore structure for samples with 0≤x≤1.5. Glancing-incidence X-ray diffraction indicated that pyrochlores with an ionic radii ratio rΛ/rB≤1.52(x≥1.5) were transformed into a radiation resistant defect-fluorite structure after irradiation at room temperature with 2 MeV Au2+ to a fluence of 5 ions/nm2. As the ionic radii ratio of the pyrochlore increased beyond rΛ/rB>1.52, the defect-fluorite structure became increasingly unstable with respect to the amorphous state under identical irradiation conditions.",
author = "Begg, {B. D.} and Hess, {N. J.} and McCready, {D. E.} and S. Thevuthasan and Weber, {W. J.}",
year = "2001",
month = "2",
doi = "10.1016/S0022-3115(00)00696-6",
language = "English",
volume = "289",
pages = "188--193",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",
number = "1-2",

}

TY - JOUR

T1 - Heavy-ion irradiation effects in Gd2(Ti2-xZrx)O7 pyrochlores

AU - Begg, B. D.

AU - Hess, N. J.

AU - McCready, D. E.

AU - Thevuthasan, S.

AU - Weber, W. J.

PY - 2001/2

Y1 - 2001/2

N2 - Gd2(Ti2-xZrx)O7 samples with 0≤x≤1.5 were single-phase and pyrochlore structured after sintering at 1600 °C in air. The Gd2Zr2O7 (x = 2) end member predominantly displayed an anion deficient-fluorite structure. Raman spectroscopy indicated that the level of short-range fluorite-like disorder in the unirradiated Gd2(Ti2-xZrx)O7 samples increased significantly as Zr was substituted for Ti, despite the retention of a long-range pyrochlore structure for samples with 0≤x≤1.5. Glancing-incidence X-ray diffraction indicated that pyrochlores with an ionic radii ratio rΛ/rB≤1.52(x≥1.5) were transformed into a radiation resistant defect-fluorite structure after irradiation at room temperature with 2 MeV Au2+ to a fluence of 5 ions/nm2. As the ionic radii ratio of the pyrochlore increased beyond rΛ/rB>1.52, the defect-fluorite structure became increasingly unstable with respect to the amorphous state under identical irradiation conditions.

AB - Gd2(Ti2-xZrx)O7 samples with 0≤x≤1.5 were single-phase and pyrochlore structured after sintering at 1600 °C in air. The Gd2Zr2O7 (x = 2) end member predominantly displayed an anion deficient-fluorite structure. Raman spectroscopy indicated that the level of short-range fluorite-like disorder in the unirradiated Gd2(Ti2-xZrx)O7 samples increased significantly as Zr was substituted for Ti, despite the retention of a long-range pyrochlore structure for samples with 0≤x≤1.5. Glancing-incidence X-ray diffraction indicated that pyrochlores with an ionic radii ratio rΛ/rB≤1.52(x≥1.5) were transformed into a radiation resistant defect-fluorite structure after irradiation at room temperature with 2 MeV Au2+ to a fluence of 5 ions/nm2. As the ionic radii ratio of the pyrochlore increased beyond rΛ/rB>1.52, the defect-fluorite structure became increasingly unstable with respect to the amorphous state under identical irradiation conditions.

UR - http://www.scopus.com/inward/record.url?scp=0034831808&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034831808&partnerID=8YFLogxK

U2 - 10.1016/S0022-3115(00)00696-6

DO - 10.1016/S0022-3115(00)00696-6

M3 - Article

VL - 289

SP - 188

EP - 193

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - 1-2

ER -