Effects of simultaneous displacive and ionizing radiations and of electric field on radiation damage in ionic crystals

Chiken Kinoshita, Kazuhiro Yasuda, Syo Matsumura, Mikio Shimada

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6 Citations (Scopus)

Abstract

We summarize our recent progress on the formation process of radiation-induced defects, their stability, and cation- and anion-disordering in ionic crystals, such as magnesium aluminate spinel and alpha alumina, under simultaneous displacive and ionizing radiations or under electric field. In those crystals, suppression of dislocation loop formation is observed under simultaneous ionizing and displacive radiations. Cation and anion disordering are also detected through newly developed analytica electron microscopy. Furthermore, the electric field suppresses the formation of dislocation loops and enhances their growth in thinner specimens of ionic crystals. Those results are discussed in terms of the instability of defect clusters under electronic excitation and displacements of structure vacancies and of the interaction between charged defects and electric fields.

Original languageEnglish
Pages (from-to)2257-2266
Number of pages10
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume35 A
Issue number8
DOIs
Publication statusPublished - Jan 1 2004

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ionic crystals
Ionizing radiation
Radiation damage
radiation damage
ionizing radiation
Electric fields
Defects
Crystals
Anions
electric fields
Cations
defects
Negative ions
radiation
Positive ions
anions
Radiation
cations
Aluminum Oxide
Dislocations (crystals)

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

Cite this

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T1 - Effects of simultaneous displacive and ionizing radiations and of electric field on radiation damage in ionic crystals

AU - Kinoshita, Chiken

AU - Yasuda, Kazuhiro

AU - Matsumura, Syo

AU - Shimada, Mikio

PY - 2004/1/1

Y1 - 2004/1/1

N2 - We summarize our recent progress on the formation process of radiation-induced defects, their stability, and cation- and anion-disordering in ionic crystals, such as magnesium aluminate spinel and alpha alumina, under simultaneous displacive and ionizing radiations or under electric field. In those crystals, suppression of dislocation loop formation is observed under simultaneous ionizing and displacive radiations. Cation and anion disordering are also detected through newly developed analytica electron microscopy. Furthermore, the electric field suppresses the formation of dislocation loops and enhances their growth in thinner specimens of ionic crystals. Those results are discussed in terms of the instability of defect clusters under electronic excitation and displacements of structure vacancies and of the interaction between charged defects and electric fields.

AB - We summarize our recent progress on the formation process of radiation-induced defects, their stability, and cation- and anion-disordering in ionic crystals, such as magnesium aluminate spinel and alpha alumina, under simultaneous displacive and ionizing radiations or under electric field. In those crystals, suppression of dislocation loop formation is observed under simultaneous ionizing and displacive radiations. Cation and anion disordering are also detected through newly developed analytica electron microscopy. Furthermore, the electric field suppresses the formation of dislocation loops and enhances their growth in thinner specimens of ionic crystals. Those results are discussed in terms of the instability of defect clusters under electronic excitation and displacements of structure vacancies and of the interaction between charged defects and electric fields.

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