The Paton Welding Journal, 2022, №04



2022 №04 (06)

DOI of Article 10.37434/tpwj2022.04.07

2022 №04 (08)

---

The Paton Welding Journal, 2022, #4, 43-50 pages

Influence of microstructure of multilayer Al/Ni foils on phase transformations initiated by heating

A.I. Ustinov, S.O. Demchenkov

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

Abstract
At heating of multilayer Al/Ni foil the component interdiffusion is accompanied by phase transformations, which can occur by a two-channel multistage or single-channel one-stage schemes. It is shown that the type of the scheme by which the phase transformations develop in the studied multilayer foils, is related to the process of formation of a metastable Al9Ni2-phase on the layer interfaces. The work is a study of the influence of multilayer foil microstructure on formation of a metastable Al9Ni2-phase. It is found that the thickness of Al9Ni2-phase layers is determined by the thickness of aluminium layers in the initial multilayer foil. At the thickness of Al layers of 70–80 nm and greater, the thickness of Al9Ni2-phase layers practically does not change, and is equal to approximately 30–35 nm; at reduction of Al layer thickness, the thickness of Al9Ni2-phase layers decreases abruptly, and at A1 thickness less than 10–12 nm, the layers of a metastable Al9Ni2-phase do not form. The process of formation of metastable Al9Ni2-phase layers is characterized by a high rate and incubation time. Proceeding from the obtained results, a structural-kinetic diagram was proposed, which allows determination of the conditions for prevention of the multistage process of achievement of the foil equilibrium state during its heating.
Keywords: multilayer foils; electron beam deposition; phase transformations; intermetallics; SHS reaction

Received: 24.11.2021
Accepted: 30.06.2022

References

1. Ramos, A.S., Vieira, M.T., Simões, S. et al. (2010) Reaction-assisted diffusion bonding of advanced materials. Defect and Diffusion Forum, 297-301, 972-977. https://doi.org/10.4028/www.scientific.net/DDF.297-301.972
2. Duckham, A., Spey, S.J., Wang, J. et al. (2004) Reactive nanostructured foil used as a heat source for joining titanium. J. of Applied Physics, 96, 2336-2342. https://doi.org/10.1063/1.1769097
3. Zaporozhets, T.V., Gusak, A.M., Ustinov, A.I. (2010) SHS reactions in nanosized multilayers: Analytical model versus numerical one. Intern. J. of Self-Propagating High-Temperature Synthesis, 19(4), 227-236. https://doi.org/10.3103/S1061386210040011
4. Grapes, M.D., LaGrange, T., Woll, K. et al. (2014) In situ transmission electron microscopy investigation of the interfacial reaction between Ni and Al during rapid heating in a nanocalorimeter. APL Materials, 2, 116102-1-116102-7. https://doi.org/10.1063/1.4900818
5. Ustinov, A., Demchenkov, S. (2017) Influence of metastable Al9Ni2 phase on the sequence of phase transformations initiated by heating of Al/Ni multilayer foils produced by EBPVD method. Intermetallics, 84, 82-91. https://doi.org/10.1016/j.intermet.2017.01.005
6. Sauvage, X., Dindab, G.P., Wildeb, G. (2007) Non-equilibrium intermixing and phase transformation in severely deformed Al/Ni multilayers. Scripta Materialia, 56, 181-184. https://doi.org/10.1016/j.scriptamat.2006.10.021
7. Blobaum, K.J., Van Heerden, D., Gavens, A.J., Weihs, T.P. (2003) Al/Ni formation reactions: Characterization of the metastable Al9Ni2 phase and analysis of its formation. Acta Materialia, 51, 3871-3884. https://doi.org/10.1016/S1359-6454(03)00211-8
8. Trenkle, J.C., Koerner, L.J., Tate, M.W. et al. (2010) Time-resolved X-ray microdiffraction studies of phase transformations during rapidly propagating reactions in Al/Ni and Zr/Ni multilayer foils. J. of Applied Physics, 107, 113511. https://doi.org/10.1063/1.3428471
9. Ishchenko, A.Ya., Falchenko, Yu.V., Ustinov, A.I. et al. (2007) Diffusion welding of finely-dispersed AMg5/27%Al2O3 composite with application of nanolayered Ni/Al foil. The Paton Welding J., 5(7), 2-5.
10. Da Silva Bassani, M.H., Perepezko, J.H., Edelstein, A.S., Everett, R.K. (1997) Initial phase evolution during interdiffusion reactions. Scripta Materialia, 37(2), 227-232. https://doi.org/10.1016/S1359-6462(97)00078-X
11. Pasichnyy, M.O., Schmitz, G., Gusak, A.M., Vovk, V. (2005) Application of the critical concentration gradient to the nucleation of the first product phase in Co/Al thin films. Physical Review B, 72(1), 014118-1-014118-7. https://doi.org/10.1103/PhysRevB.72.014118
12. Zhou, X.W., Johnson, R.A., Wadley, H.N.G. (1997) Vacancy formation during vapor deposition. Acta Materialia, 45(11), 4441-4452. https://doi.org/10.1016/S1359-6454(97)00156-0
13. Gusak, A.M., Zaporozhets, T.V., Lyashenko, Yu.O. et al. (2010) Diffusion-controlled solid state reactions: Alloys, Thin-films and Nanosystems, Wiley-VCH, Berlin. https://doi.org/10.1002/9783527631025
14. Petrantoni, M., Hémeryck, A., Ducéré, J. et al. (2010) Asymmetric diffusion as a key mechanism in Ni/Al energetic multilayer processing: A first principles study. J. of Vacuum Sci. and Technology, 28(6), 15-17. https://doi.org/10.1116/1.3491182
15. Yücelen, E. (2011) Characterization of Low-dimensional structures by Advanced Transmission Electron Microscopy. PhD thesis, Delft University of Technology.

---