Facile synthesis of fine Ti–Al intermetallic compound powders via sodiothermic reduction in molten CaCl2

Chao Du, Jiusan Xiao, Bao Zhang, Hongmin Zhu

Research output: Contribution to journalArticlepeer-review

Abstract

Fine powders of titanium aluminides, the Ti–Al intermetallic compounds were directly synthesized via sodiothermic reduction of TiO2/Al2O3 composites in molten CaCl2. By using uniformly ball milled TiO2/Al2O3 composites, all types of titanium aluminides (Ti3Al, TiAl and TiAl3) were successfully synthesized in strictly single phase of the all product powders. Through this synthesis method, the composition of Ti–Al alloy powders is tunable in the entail range of the binary system, and the all composition is uniformed in the all particles. The average particle size of the product powders was in the range of some hundreds of nanometers. The oxygen content in the product powders was proportional to its specific surface area, and was reduced down to less than 1500 ppm when reacted at 1373 K for 72 h.

Original languageEnglish
Article number107038
JournalIntermetallics
Volume129
DOIs
Publication statusPublished - 2021 Feb

Keywords

  • Co-reduction
  • Molten CaCl
  • Oxygen content
  • Ti–Al intermetallics

ASJC Scopus subject areas

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

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