Annealing response of point defects in off-stoichiometric Mo5SiB2 phase

N. Sekido, R. Sakidja, J. H. Perepezko

研究成果: Article査読

22 被引用数 (Scopus)

抄録

Dislocations and planar faults are found to develop in the Mo5SiB2 phase during elevated temperature annealing. The dislocations formed in Mo5SiB2 of annealed alloys are mostly edge dislocations with the Burgers vectors of 〈100], 1/2〈111], and 〈110]. For the Mo-rich Mo5SiB2 phase that formed in a Mo-10Si-20B alloy, a significant amount of constitutional vacancies is introduced during solidification, and the excess vacancies aggregate and collapse into dislocations. At the same time, these dislocations can act as the heterogeneous nucleation sites for the subsequent Mo precipitation. For the Mo-lean Mo5SiB2 phase that formed in a Mo-13Si-28B alloy, the constitutional defects are not significant for the development of dislocations.

本文言語English
ページ(範囲)1268-1276
ページ数9
ジャーナルIntermetallics
15
9
DOI
出版ステータスPublished - 2007 9月
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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