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Hydrogen and its effect on Ti-Ni powder grinding

Abdulmenova, E. V. ; Kulkov, S. N. Fomin, Vasily M. ; Kolubaev, Evgeny A.

AIP Conference Proceedings, 2022, Vol.2509 (1) [Periódico revisado por pares]

Melville: American Institute of Physics

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  • Título:
    Hydrogen and its effect on Ti-Ni powder grinding
  • Autor: Abdulmenova, E. V. ; Kulkov, S. N.
  • Fomin, Vasily M. ; Kolubaev, Evgeny A.
  • Assuntos: Austenite ; Dislocation density ; Grinding ; Hydrogenation ; Intermetallic compounds ; Lattice parameters ; Nickel base alloys ; Nickel compounds ; Structural analysis ; Temperature ; Titanium compounds
  • É parte de: AIP Conference Proceedings, 2022, Vol.2509 (1)
  • Descrição: The effect of hydrogen on Ti-Ni powder grinding has been studied. It is shown that the average size of the powder particles measured by SEM decreases from 11.1 to 6.7 µm during mechanical treatment with pre-hydrogenation for 180 min. It was revealed that after mechanical treatment, the lattice parameters of the TiNi (austenite), Ti2Ni and Ni3Ti phases do not change. The lattice parameter of only the Ti2Ni phase changes significantly after mechanical treatment of the pre-hydrogenated powder. In particular, the lattice parameter increases to 1.1457 ± 5 × 10−4 nm after 180 minutes of hydrogenation and corresponds to the lattice parameter of Ti2NiH0.5 hydride. The CDD size of the TiNi phase does not change and equals 25 ± 5 nm. The Ti2Ni phase exhibits the highest dislocation density estimated from the data of X-ray structural analysis compared with the TiNi (austenite) and Ni3Ti phases. Thus, pre-hydrogenation can be effective for obtaining fine powders in a high-intensity mill by suppressing aggregation of fine particles.
  • Editor: Melville: American Institute of Physics
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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