Nucleation of (Mo) precipitates on dislocations during annealing of a Mo-rich Mo5SiB2 phase

Nobuaki Sekido, Ridwan Sakidja, John H. Perepezko

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

Upon annealing an as-cast Mo-10Si-20B alloy at high temperatures, a Mo solid solution phase precipitates within a supersaturated Mo5SiB 2 phase. The precipitation behavior of the Mo solid solution was investigated by means of transmission electron microscopy and X-ray diffractometry. It is found that the Mo5SiB2 phase in a Mo-10Si-20B alloy contains a significant amount of structural vacancies in the as-cast state. The excess vacancies are removed to form dislocations during annealing, which provides the heterogeneous nucleation sites for the (Mo) precipitates.

Original languageEnglish
Article numberS5.35
Pages (from-to)321-326
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume842
Publication statusPublished - 2005 Aug 25
Externally publishedYes
Event2004 MRS Fall Meeting - Boston, MA, United States
Duration: 2004 Nov 292004 Dec 2

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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