Unusual variation of temperature factor of uranium dioxide at high temperature

Hiroyuki Serizawa, Kousaku Fukuda, Tetuo Shiratori, Takeo Fujino, Nobuaki Sato, Kohta Yamada

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

High temperature behavior of UO2 was examined by X-ray diffraction. The temperature factor of UO2 was evaluated at room temperature and at high temperatures from 1003 to 1573 K. Two types of factors were calculated: the overall temperature factor of U and O atoms, designated as B; and the temperature factor of U atom, BU. In both cases, the value of the factors increased with increasing temperature up to ca. 1400 K. However, an anomalous decrease in these factors was detected above 1400 K. X-ray Debye temperature, Θ, was derived from the temperature factors as a function of temperature. Corresponding to the anomaly of the temperature factor, Θ increased atypically at the temperature higher than ca. 1400 K.

Original languageEnglish
Pages (from-to)386-390
Number of pages5
JournalJournal of Alloys and Compounds
Volume271-273
DOIs
Publication statusPublished - 1998 Jun 12

Keywords

  • High temperature
  • Temperature factor
  • UO
  • X-ray diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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