Microstructure control of Nb-Si alloy doped with Zr and Mg through eutectic and eutectoid reactions and its deformation behavior

Seiji Miura, Yuki Murasato, Kenji Ohkubo, Yoshisato Kimura, Nobuaki Sekido, Yoshinao Mishima, Tetsuo Mori

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

In order to overcome the brittleness of Nb-Si intermetallic compounds, novel microstructure control through eutectic solidification and eutectoid decomposition reactions has been proposed for obtaining Nb matrix alloys with a Nb-silicide dispersion by the present authors. As the additions of Zr and Mg accelerate the eutectoid decomposition rate and spheroidization of Nb-silicide during heat treatment, the effects of these additives on the eutectic microstructure are investigated. The effect of the growth rate during the uni-directional solidification on the microstructure of a selected alloy was examined and it was found that the following eutectoid reaction rate is strongly affected by the growth rate.

Original languageEnglish
Pages (from-to)327-332
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume980
Publication statusPublished - 2007 Jan 1
Event2006 MRS Fall Meeting - Boston, MA, United States
Duration: 2006 Nov 272006 Nov 29

ASJC Scopus subject areas

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

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