Ion irradiation-induced amorphization and nano-crystal formation in garnets

S. Utsunomiya, L. M. Wang, S. Yudintsev, R. C. Ewing

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The radiation susceptibility of garnet structure types (A3B2(XO4)3, Ia3d, Z = 8) has been examined by 1.0 MeV Kr2+ irradiation with in situ transmission electron microscopy over the temperature range of 50-1070 K. The target garnets included five natural garnets: almandine, andradite, pyrope, grossular and spessartine, and five synthetic garnets incorporating various contents of actinides. The synthetic garnets were silicates (N-series) and ferrate-aluminates (G-series). The critical amorphization temperature (Tc), above which amorphization does not occur, were determined to be 1050 K for N77, 1130 K for N56, 1100 K for G3, 890 K for G4 and 1030 K for andradite. Tc of the synthetic garnets increased with increasing mass density of the target and as the electronic-to-nuclear stopping power ratio decreased. During ion irradiation of the G3 garnet at a temperature of 1023 K near the Tc, nano-crystals were produced in which the unit-cell parameter of the original garnet was halved (∼0.64 nm) as a result of a radiation-induced recrystallization process, without evidence for ordering of the cations.

Original languageEnglish
Pages (from-to)177-187
Number of pages11
JournalJournal of Nuclear Materials
Volume303
Issue number2-3
DOIs
Publication statusPublished - Jun 1 2002
Externally publishedYes

Fingerprint

Amorphization
Garnets
Ion bombardment
ion irradiation
garnets
Crystals
crystals
Actinoid Series Elements
ferrates
aluminates
Radiation
Silicates
Actinides
stopping power
radiation
Nuclear energy
Temperature
Cations
silicates
critical temperature

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Cite this

Ion irradiation-induced amorphization and nano-crystal formation in garnets. / Utsunomiya, S.; Wang, L. M.; Yudintsev, S.; Ewing, R. C.

In: Journal of Nuclear Materials, Vol. 303, No. 2-3, 01.06.2002, p. 177-187.

Research output: Contribution to journalArticle

Utsunomiya, S. ; Wang, L. M. ; Yudintsev, S. ; Ewing, R. C. / Ion irradiation-induced amorphization and nano-crystal formation in garnets. In: Journal of Nuclear Materials. 2002 ; Vol. 303, No. 2-3. pp. 177-187.
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