Direct synthesis of Nb-Al intermetallic nanoparticles by sodiothermic homogeneous reduction in molten salts

Na Wang, Chao Du, Jungang Hou, Yao Zhang, Kai Huang, Shuqiang Jiao, Hongmin Zhu

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Nb-Al intermetallic nanoparticles were directly synthesized via sodiothermic reduction process in molten salts using NbCl5 and AlCl3 as the raw materials. The as-prepared samples were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The NbCl5 and AlCl3 were dissolved in LiCl-KCl-CaCl2 or LiCl-KCl-NaCl-CaCl2 molten salts forming a homogeneous system. It was found that a series of intermetallic nanoparticles, such as Nb3Al, Nb2Al, NbAl3 and Nb2Al/NbAl3, were successfully synthesized at low temperature of 350-500 C using the homogeneous molten salt systems. The phase transformations of Nb3Al, Nb2Al and NbAl3, were achieved via the controllable variation of molar ratio of Nb to Al. Furthermore, the influence of the reaction temperature on the particle size of the intermetallic nanoparticles was also investigated.

Original languageEnglish
Pages (from-to)45-52
Number of pages8
JournalIntermetallics
Volume43
DOIs
Publication statusPublished - 2013 Aug 14
Externally publishedYes

Keywords

  • A. Nanostructured intermetallics
  • A. Niobium aluminides
  • C. Reaction synthesis
  • F. Diffraction
  • F. Electron microscopy, scanning
  • F. Electron microscopy, transmission

ASJC Scopus subject areas

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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