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Title: Behavior of implanted strontium in yttria-stabilized zirconia

Abstract

Yttria-stabilized zirconia (YSZ) is one of the promising candidates for application in the inert matrix fuel. This letter presents the effects of fission product strontium incorporation in the YSZ microstructure. The strontium ions were implanted at room temperature to a dose of 1x10{sup 17} ions/cm{sup 2} and that was followed by subsequently annealing at 1000 deg. C for 1-3 h. Transmission electron microscopy (TEM) was utilized to characterize the microstructure evolution after the implantation and/or annealing. No amorphization was observed in the YSZ matrix with a damage level of 200 dpa (displacements per atom). A layer of nanoscale strontium zirconate perovskite (SrZrO{sub 3}) precipitates formed in strontium-ion implanted YSZ single crystals after the annealing. Cross-sectional TEM revealed the crystalline particles of {approx}15 nm in size and they are crystallographically highly oriented with the YSZ matrix. The orientation relationship between the matrix and the precipitates has been determined as <011>{sub YSZ}(parallel sign)<111>{sub SrZrO{sub 3}}, (200){sub YSZ}(parallel sign)(110){sub SrZrO{sub 3}}. The interface is composed of misfit dislocations with b=1/2<200>{sub YSZ}.

Authors:
; ; ; ;  [1];  [2]
  1. Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States) and Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2104 (United States)
  2. (China)
Publication Date:
OSTI Identifier:
20971872
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 90; Journal Issue: 17; Other Information: DOI: 10.1063/1.2713127; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AMORPHOUS STATE; ANNEALING; ATOMIC DISPLACEMENTS; DISLOCATIONS; GRAIN BOUNDARIES; ION BEAMS; ION IMPLANTATION; MONOCRYSTALS; NANOSTRUCTURES; PARTICLES; PEROVSKITE; PRECIPITATION; STRONTIUM; STRONTIUM IONS; TEMPERATURE RANGE 0273-0400 K; TRANSMISSION ELECTRON MICROSCOPY; YTTRIUM OXIDES; ZIRCONATES; ZIRCONIUM OXIDES

Citation Formats

Zhu, S., Wang, S. X., Wang, L. M., Ewing, R. C., Zu, X. T., and Department of Applied Physics, University of Electronic and Technology of China, Chengdu 610054. Behavior of implanted strontium in yttria-stabilized zirconia. United States: N. p., 2007. Web. doi:10.1063/1.2713127.
Zhu, S., Wang, S. X., Wang, L. M., Ewing, R. C., Zu, X. T., & Department of Applied Physics, University of Electronic and Technology of China, Chengdu 610054. Behavior of implanted strontium in yttria-stabilized zirconia. United States. doi:10.1063/1.2713127.
Zhu, S., Wang, S. X., Wang, L. M., Ewing, R. C., Zu, X. T., and Department of Applied Physics, University of Electronic and Technology of China, Chengdu 610054. Mon . "Behavior of implanted strontium in yttria-stabilized zirconia". United States. doi:10.1063/1.2713127.
@article{osti_20971872,
title = {Behavior of implanted strontium in yttria-stabilized zirconia},
author = {Zhu, S. and Wang, S. X. and Wang, L. M. and Ewing, R. C. and Zu, X. T. and Department of Applied Physics, University of Electronic and Technology of China, Chengdu 610054},
abstractNote = {Yttria-stabilized zirconia (YSZ) is one of the promising candidates for application in the inert matrix fuel. This letter presents the effects of fission product strontium incorporation in the YSZ microstructure. The strontium ions were implanted at room temperature to a dose of 1x10{sup 17} ions/cm{sup 2} and that was followed by subsequently annealing at 1000 deg. C for 1-3 h. Transmission electron microscopy (TEM) was utilized to characterize the microstructure evolution after the implantation and/or annealing. No amorphization was observed in the YSZ matrix with a damage level of 200 dpa (displacements per atom). A layer of nanoscale strontium zirconate perovskite (SrZrO{sub 3}) precipitates formed in strontium-ion implanted YSZ single crystals after the annealing. Cross-sectional TEM revealed the crystalline particles of {approx}15 nm in size and they are crystallographically highly oriented with the YSZ matrix. The orientation relationship between the matrix and the precipitates has been determined as <011>{sub YSZ}(parallel sign)<111>{sub SrZrO{sub 3}}, (200){sub YSZ}(parallel sign)(110){sub SrZrO{sub 3}}. The interface is composed of misfit dislocations with b=1/2<200>{sub YSZ}.},
doi = {10.1063/1.2713127},
journal = {Applied Physics Letters},
number = 17,
volume = 90,
place = {United States},
year = {Mon Apr 23 00:00:00 EDT 2007},
month = {Mon Apr 23 00:00:00 EDT 2007}
}
  • Equimolar powder mixtures and multilayer pellets of single-phase Sr-doped lanthanum manganite perovskite materials La{sub y{minus}x}Sr{sub x}MnO{sub 3} with La content y = 1 and 0.95 and Sr content 0 {<=} x {<=} 0.5 were annealed in air with 8 mol% Y{sub 2}O{sub 3}ZrO{sub 2} at 1470 K up to 400 h and at 1670 K up to 200 h. X-ray diffraction and electron probe microanalysis confirmed the formation of La{sub 2}Zr{sub 2}O{sub 7} or SrZrO{sub 3} depending on the composition of the perovskites. No reaction products could be detected for La{sub 0.95 {minus}x}Sr{sub x}MnO{sub 3} with 0.2 {<=} x {<=}more » 0.4 after annealing for 400 h at 1470 K, and for the perovskite La{sub 0.65}Sr{sub 0.3}MnO{sub 3} even after annealing for 200 h at 1,670 K. The results demonstrate the improved chemical compatibility of La-deficient perovskites against reaction with zirconia and can provide a basis for the selection of a sufficiently chemically stable material for the air electrode of solid oxide fuel cells.« less
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  • YBa[sub 2]Cu[sub 3]O[sub 7[minus]x] (YBCO) was evaluated as a potential electrode material for yttria stabilized zirconia (YSZ) based electrochemical devices, due to its high electronic conductivity and capability for oxide ion transport. YBCO electrodes were deposited by screen-printing, which requires moderately high firing temperatures to assure a good bonding and mechanical stability of the deposited layers. Unfortunately, chemical reactivity towards the YSZ electrolyte may significantly decrease electrode performance. In addition, electrochemical decomposition of YBa[sub 2]Cu[sub 3]O[sub 7[minus]x] was observed at fairly low current densities ([approx]20 mA/cm[sup 2]). Overpotentials increased as electrode firing temperature increased from 920 to 940 C duemore » to electrode densification. At 960 C, the onset of chemical degradation was observed but overpotential losses were lowest for these firing conditions. Microstructural examination indicated that partial degradation during sintering had allowed a more porous microstructure to develop at 960 C.« less
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