Preparation of niobium aluminides intermetallic powders by sodiothermic reduction process

Na Wang, Qin Chen Hu, Yao Zhang, Hong Min Zhu

Research output: Contribution to journalArticlepeer-review

Abstract

The niobium aluminides intermetallic particles were prepared by a sodiothermic reduction process using Nb2O5 and NaAlO2 as raw materials, NaCl and CaCl2 as the diluents and sodium as a reducing agent. The phases, morphology and particle size of niobium aluminides intermetallic powders depending on the molar ratio of oxygen in raw materials and CaCl2 in the molten salt, the atomic ratio of niobium and aluminum in raw materials and premelting time in molten salts were analyzed. The NbAl3 and Nb3Al particles are obtained at 680°C and 750°C for the 6.0 h premelting time, respectively, and the particle size of NbAl3 and Nb3Al powders is about 50~260 nm and 30~180 nm. Besides, the purity of the niobium aluminides intermetallics powders was increased along with the increasing of the premelting time.

Original languageEnglish
Pages (from-to)281-289
Number of pages9
JournalFenmo Yejin Cailiao Kexue yu Gongcheng/Materials Science and Engineering of Powder Metallurgy
Volume18
Issue number2
Publication statusPublished - 2013 Apr 1
Externally publishedYes

Keywords

  • Molten salts
  • NbO
  • Niobium aluminides intermetallics
  • Sodiothermic reduction process

ASJC Scopus subject areas

  • Metals and Alloys

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