Reaction behavior and pore formation mechanism of TiAl-Nb porous alloys prepared by elemental powder metallurgy

Yongfeng Liang, Fan Yang, Laiqi Zhang, Junpin Lin, Shunli Shang, Zi Kui Liu

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Ti-48Al-6Nb (at.%) porous alloys are fabricated by elemental powder metallurgy to study the pore formation and propagation mechanism. Reactive diffusion, pore formation process, and pore characteristics of the porous TiAl-Nb alloys are investigated at different temperatures. It is found that the porous alloys exhibit a uniform, maze-like network skeleton, viz., a typical α2-TiAl3/γ-TiAl fully lamellar microstructure. The reactive diffusivities between Ti and Al powders are dominant during the Ti-Al-Nb powder sintering. Gas release during sintering also plays an important role in the pore propagation and the compact expanding process. In addition, a pore-formation model is proposed to interpret the growth mechanism of pores and skeletons.

Original languageEnglish (US)
Pages (from-to)1-7
Number of pages7
JournalIntermetallics
Volume44
DOIs
StatePublished - 2014

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Reaction behavior and pore formation mechanism of TiAl-Nb porous alloys prepared by elemental powder metallurgy'. Together they form a unique fingerprint.

Cite this