Phase transformation of nanosized ZrO2 upon thermal annealing and intense radiation

Fengyuan Lu, Jiaming Zhang, Mengbing Huang, Fereydoon Namavar, Rodney C. Ewing, Jie Lian

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

The phase stability and microstructure evolution of zirconia nanofilms on Si substrates prepared by ion beam assisted deposition (IBAD) upon thermal annealing and intensive radiation have been studied by in situ transmission electron microscopy (TEM), ex situ X-ray diffraction, and Raman spectroscopy. For as-prepared amorphous-dominant ZrO2 thin films, a phase transformation sequence of amorphous-to-tetragonal and tetragonal-to-monoclinic has been identified upon increasing annealing temperature from 500, 850, to 1000 °C. This phase transformation sequence varying with annealing temperature is accompanied by concomitant grain growth from ∼5 to ∼50 nm, consistent with the grain-size-controlled phase stability as a result of total energy crossover among different zirconia polymorphs. Upon ion bombardments of 350 KeV O+ and 1 MeV Kr2+ at room temperature, a monoclinic-to-tetragonal phase transformation was observed in the monoclinic-dominant ZrO2. This monoclinic-to-tetragonal phase transformation may be attributed to the oxygen vacancy accumulation in ZrO 2 upon irradiation. Furthermore, both 1 MeV Kr2+ and 350 KeV O+ bombardments on the amorphous-dominant ZrO2 lead to an amorphous-to-tetragonal phase transformation as a result of radiation-induced recrystallization process. Thermodynamically metastable tetragonal ZrO2 phase can be stabilized at room temperature under intensive radiation by relatively low-energy ion bombardments. These results suggest a method of combining both thermal annealing and ion beam technique for controlling ZrO2 phase stability and thus tailoring materials properties for many engineering applications including actinide host matrix for advanced nuclear energy systems.

Original languageEnglish (US)
Pages (from-to)7193-7201
Number of pages9
JournalJournal of Physical Chemistry C
Volume115
Issue number15
DOIs
StatePublished - Apr 21 2011

Fingerprint

phase transformations
Phase transitions
Phase stability
Annealing
Radiation
annealing
radiation
bombardment
Ion bombardment
zirconium oxides
Zirconia
ion beams
Actinoid Series Elements
Ion beam assisted deposition
Temperature
Actinides
room temperature
Oxygen vacancies
nuclear energy
Polymorphism

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Lu, F., Zhang, J., Huang, M., Namavar, F., Ewing, R. C., & Lian, J. (2011). Phase transformation of nanosized ZrO2 upon thermal annealing and intense radiation. Journal of Physical Chemistry C, 115(15), 7193-7201. https://doi.org/10.1021/jp109558s

Phase transformation of nanosized ZrO2 upon thermal annealing and intense radiation. / Lu, Fengyuan; Zhang, Jiaming; Huang, Mengbing; Namavar, Fereydoon; Ewing, Rodney C.; Lian, Jie.

In: Journal of Physical Chemistry C, Vol. 115, No. 15, 21.04.2011, p. 7193-7201.

Research output: Contribution to journalArticle

Lu, F, Zhang, J, Huang, M, Namavar, F, Ewing, RC & Lian, J 2011, 'Phase transformation of nanosized ZrO2 upon thermal annealing and intense radiation', Journal of Physical Chemistry C, vol. 115, no. 15, pp. 7193-7201. https://doi.org/10.1021/jp109558s
Lu, Fengyuan ; Zhang, Jiaming ; Huang, Mengbing ; Namavar, Fereydoon ; Ewing, Rodney C. ; Lian, Jie. / Phase transformation of nanosized ZrO2 upon thermal annealing and intense radiation. In: Journal of Physical Chemistry C. 2011 ; Vol. 115, No. 15. pp. 7193-7201.
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