Shock reactive synthesis of TiAl

T. Aizawa, S. Kamenosono, J. Kihara, T. Kato, K. Tanaka, Y. Nakayama

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Abstract

The shock reactive synthesis (SRS) processing was developed to yield bulk solid titanium aluminides in a non-equilibrium phase structure. From blended element powder compacts with a composition of Ti50A150, TiAl is directly synthesized without porosities. The shock-induced reactions can be macroscopically described by SRS-diagram, and the effect of the detonation condition and the green compact porosity on the constituent phases and microstructure of synthesized materials are also discussed on this diagram. In the reactive zone of this diagram, the abundance ratio of α2 to γ in the α2γ two-phase synthesized materials can be controlled from the equilibrium ratio to the α2 single phase by increasing the detonation velocity and/or the porosity of compact. By using multi-layered samples with a sandwich structure of Ti and Al porous discs, the fundamental mechanism of shock-induced reactions can be investigated to clarify the role of high speed mixing and homogenization of titanium and aluminum in the reaction process at the passage of shock wave.

Original languageEnglish
Pages (from-to)369-379
Number of pages11
JournalIntermetallics
Volume3
Issue number5
DOIs
Publication statusPublished - 1995

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Keywords

  • Shock reactive synthesis
  • detonation velocity
  • porosity
  • refractory metal aluminides
  • shock induced reaction
  • shock reactive synthesis diagram
  • shock wave structure

ASJC Scopus subject areas

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

Cite this

Aizawa, T., Kamenosono, S., Kihara, J., Kato, T., Tanaka, K., & Nakayama, Y. (1995). Shock reactive synthesis of TiAl. Intermetallics, 3(5), 369-379. https://doi.org/10.1016/0966-9795(94)00036-K