In-situ transmission electron microscopy determination of solid-state diffusion in the aluminum-nickel system
Using in-situ techniques, which couple energy dispersive spectroscopy mapping with a heated transmission electron microscope stage, solid-state diffusion of Ni-Al is studied in the temperature range 623–723 K with characteristic diffusion lengths of 1–100 nm. When the concentration profiles are anal...
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| Veröffentlicht in: | Journal of solid state chemistry 2019-08, Vol.276 (C), p.114-121 |
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| container_issue | C |
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| container_title | Journal of solid state chemistry |
| container_volume | 276 |
| creator | Pauls, Joshua M. Shuck, Christopher E. Genç, Arda Rouvimov, Sergei Mukasyan, Alexander S. |
| description | Using in-situ techniques, which couple energy dispersive spectroscopy mapping with a heated transmission electron microscope stage, solid-state diffusion of Ni-Al is studied in the temperature range 623–723 K with characteristic diffusion lengths of 1–100 nm. When the concentration profiles are analyzed using the Sauer-Freise method, and evaluated for 50 atomic percent Ni, the diffusion coefficients follow an Arrhenius temperature dependence: DNi→Al=8.2x10−9exp(−111kJ/RT)m2/s. Additionally, the formation of Al-rich intermetallic phases (Al3Ni & Al3Ni2) is shown to occur within heating durations of a second at the studied temperatures.
EDS maps showing Ni-Al interdiffusion in the temperature range 623–723 K and the temperature dependence of diffusivity determined for 480–1140 K from this study and several previous studies. [Display omitted] |
| doi_str_mv | 10.1016/j.jssc.2019.04.024 |
| format | Article |
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| ispartof | Journal of solid state chemistry, 2019-08, Vol.276 (C), p.114-121 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Combustion synthesis Diffusion In situ transmission electron microscopy (TEM) Intermetallics Mechanical milling |
| title | In-situ transmission electron microscopy determination of solid-state diffusion in the aluminum-nickel system |
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