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High-resolution electron microscopy of nanocrystalline Ni-Al alloys: instability of ordered structure and dynamic behaviour of grain boundaries

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Abstract

High-resolution transmission electron microscopy was performed on vacuum-deposited nanocrystalline nickel aluminide films. Several nickel aluminide ordered structures, i.e. L12(Ni3Al)-, B2(NiAl)-, D513(Ni2Al3)- and D020(NiAl3)-type structures, were observed in the deposited films. The L12 and B2 ordered structures became unstable with decreasing grain sizes. The critical grain size on transformation from the L12- and B2-type ordered structures into disordered structures was ca. 5 nm at ambient temperatures. High atomic diffusion, sufficient for grain growth, and an increase in the ordering occurred just above 400°C in the nanocrystalline Ni-Al films with L12- and B2-type structures. The diffusion bonding process, at ambient temperatures, between Ni-Al nanocrystallites with an L12-type structure was observed dynamically at atomic resolution under strong electron irradiation. It was found that the nanocrystallites rotated and slid without crack generation, and neck-growth proceeded even at ambient temperatures.

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References

  1. P. A. FLINN, Trans TMS-AIME 218 (1960) 145.

    CAS  Google Scholar 

  2. K. AOKI and O. IZUMI, Trans Jpn. Inst. Met. 43 (1979) 1190.

    Article  CAS  Google Scholar 

  3. T. S. SRIVATSAN, S. ANAND, S. SRIRAM and T. S. SUDARSHAN, J. Mater. Sci. 27 (1992) 5939.

    Article  CAS  Google Scholar 

  4. D. E. MEYERS and A. J. ARDELL, Acta Metall Mater. 41 (1993) 2601.

    Article  CAS  Google Scholar 

  5. H. LIN and D. P. POPE, Acta Metall. Mater. 41 (1993) 553.

    Article  CAS  Google Scholar 

  6. T. H. CHUNG, Y. C. PAN and S. E. HSU, Metall. Trans. A22 (1991) 1801.

    Article  Google Scholar 

  7. E. M. SHULSON, Res. Mech. Lett. 1 (1981) 519.

    Google Scholar 

  8. E. M. SHULSON and D. R. BARKER, Scripta Metall. 17 (1983) 519.

    Article  Google Scholar 

  9. J. KARCH, R. BIRRINGER and H. GLEITER, Nature 330 (1989) 556.

    Article  Google Scholar 

  10. K. ISHIZUKA, Ultramicrosc. 5 (1980) 55.

    Article  CAS  Google Scholar 

  11. R. W. CAHN, P. A. SIEMERS, J. E. GEIGER and P. BARDHAN, Acta Metall. 35 (1987) 37.

    Google Scholar 

  12. H. C. LIU and T. E. MITCHELL, Acta Metall. 31 (1983) 863.

    Article  CAS  Google Scholar 

  13. M. D. BARÓ, S. SURINACH, J. MALAGELADA, M. T. CLAVAGUERA-MORA, S. GIALANELLA and R. W. CAHN, Acta Metall. Matter. 41 (1993) 1065.

    Article  Google Scholar 

  14. J. S. C. JANG and C. C. KOCH, J. Matter. Res. 5 (1990) 498.

    Article  CAS  Google Scholar 

  15. P. B. HIRSCH, A. HOWIE, R. NICHOLSON, D. W. PASHLEY and M. J. WHELAN “Electron microscopy of thin crystals” (Butterworth, London, 1965) p. 143.

    Google Scholar 

  16. H. FUJITA, ISIJ, Inst., 30 (1990) 70.

    Article  CAS  Google Scholar 

  17. K. MUROOKA, M. MITOME, Y. TANISHIRO and K. TAKAYANAGI, J. Vac. Sci. Tech., A8 (1990) 153.

    Article  Google Scholar 

  18. T. KIZUKA and N. TANAKA, Phil. Mag. Lett., 69 (1994) 135.

    Article  CAS  Google Scholar 

  19. R. BIRRINGER, H. HAHN, H. HOFLER, J. KARCH and H. GLEITER, Defect and Diffusion Forum, 59 (1988) 17.

    Article  Google Scholar 

  20. J. W. EDINGTON, K. N. MELTON and C. P. CUTLER, Prog. Mater. Sci. 21 (1976) 61.

    Article  CAS  Google Scholar 

  21. F. WAKAI, S. SAKAGUCHI and Y. MATSUNO, Adv. Ceram. Mater. 1 (1986) 259.

    Article  CAS  Google Scholar 

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Kizuka, T., Mitarai, N. & Tanaka, N. High-resolution electron microscopy of nanocrystalline Ni-Al alloys: instability of ordered structure and dynamic behaviour of grain boundaries. JOURNAL OF MATERIALS SCIENCE 29, 5599–5606 (1994). https://doi.org/10.1007/BF00349953

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