Fabrication of micro-fine high Nb-containing TiAl alloyed powders by fluidized bed jet milling

Xin Lu, Langping Zhu, Chengcheng Liu, Lin Zhang, Mao Wu, Xuanhui Qu

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A fluidized bed jet milling process was used to make micro-fine high Nb-containing TiAl alloyed powders from the chippings obtained by crushing the Ti-45Al-8.5Nb-(W,B,Y) ingot. The influences of classifier frequency on powder characteristics were investigated. The results show that the powders with controlled average particle size can be prepared on a large scale. The powders with different sizes are all dominated by γ with a minor amount of α 2-Ti 3Al. The particle size significantly decreases with the classifier frequency increasing. At a classifier frequency higher than 38 Hz, the average particle size of the ground powders is lower than 25 μm. The powders are composed of two different sizes of particles: shaped particles and some clastic particles, and both particle sizes meet the log-normal distribution. With the classifier frequency increasing, the both sizes decrease; meanwhile, the proportion of the clastic particles gradually increases, and the size distribution span value of the ground powders increases correspondingly.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalRare Metals
Volume31
Issue number1
DOIs
Publication statusPublished - 2012 Feb 1
Externally publishedYes

Keywords

  • Classifier frequency
  • Fluidized bed jet milling
  • High Nb-containing TiAl alloys
  • Powder characteristics
  • Powder preparation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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