Fabrication of micro-fine spherical high Nb containing TiAl alloy powder based on reaction synthesis and RF plasma spheroidization

J. B. Tong, X. Lu, C. C. Liu, L. N. Wang, X. H. Qu

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

A compact process for fabricating micro-fine spherical TiAl-Nb alloy powders was developed with a combination of reaction synthesis and plasma spheroidization technique. Powders of TiH2, Al and Nb were firstly mixed and refined by high-energy ball milling, and the mixture was then heated at different temperatures ranging from 600 to 1200°C for 2h, allowing synthesis reaction to take place. Ultimately, the synthesized powders melt through radio frequency (RF) argon plasma and rapidly solidified into micro-fine spherical TiAl-Nb alloy powders. The fabrication process and powder characteristics were investigated. With the process described above, the alloy powders with high composition homogeneity and good sphericity can be fabricated. The obtained spherical powders perform a uniform equiaxed-grain microstructure dominated by a supersaturated α2-Ti3Al phase. The powders possess a micro-fine average particle size of 9.6μm, with a distribution uniformity level of 0.622.

Original languageEnglish
Pages (from-to)9-15
Number of pages7
JournalPowder Technology
Volume283
DOIs
Publication statusPublished - 2015 Oct 1
Externally publishedYes

Keywords

  • High Nb containing TiAl based alloy
  • Powder preparation
  • RF plasma spheroidization
  • Reaction synthesis

ASJC Scopus subject areas

  • Chemical Engineering(all)

Fingerprint Dive into the research topics of 'Fabrication of micro-fine spherical high Nb containing TiAl alloy powder based on reaction synthesis and RF plasma spheroidization'. Together they form a unique fingerprint.

  • Cite this