Diffusion in Intermetallic Compounds and Fabrication of Hollow Nanoparticles through Kirkendall Effect

Abstract:

. In intermetallic compounds, random vacancy motion is not possible as it would disrupt the equilibrium ordered arrangement of atoms on lattice sites. In view of this limitation, various atomistic models have been proposed, which allow atom-vacancy exchanges to take place without concomitant long range disordering. For a L12 -type A3B structure, the major element A diffuses faster than the minor element B. The trend is attributed to the different diffusing paths; A atoms can diffuse through site exchanges with a neighbouring vacancy on its own sublattice, while the jump of a B atom to a neighbouring site always creates wrong bonds. For L10-type structures such as γ-TiAl, significant diffusion anisotropy is observed; Ti atoms diffuse on the Ti sublattice, while Al atoms also diffuse on the Ti sublattice. The formation of hollow metal oxide nanoparticles through the oxidation process has been studied by transmission electron microscopy for Cu, Zn, Al, Pb and Ni. The hollow structure is obtained as a result of vacancy aggregation, resulting from the rapid outward diffusion of metal ions through the oxide layer during the oxidation process. This suggests the occurrence of two different diffusion processes in the formation of hollow oxides.

• Periodical: Journal of Nano Research (Volume 7)
• Pages: 1-10
• DOI: https://doi.org/10.4028/www.scientific.net/JNanoR.7.1
• Online since: July 2009
• Authors: Hideo Nakajima, Ryusuke Nakamura
• Keywords: Hollow Nanoparticle, Intermetallic Compound (IMC), Nanoporous, Ordered Structure, Oxidation, Self-Diffusion, Tracer Diffusion

References

[1] H.B. Huntington: private communication to Slifkin (1967).

[2] M. Arita, M. Koiwa and S. Ishioka: Phil. Mag. Vol. 60 (1989), p.563.

[3] H. Bakker, N.A. Stolwijk and M.A. Hoetjes-Eljkel: Phil. Mag. Vol. 43 (1981), p.251.

[4] H. Numakura, T. Ikeda, H. Nakajima and M. Koiwa: Mater. Sci. Eng. Vol. A312 (2001), p.109.

[5] T. Ikeda, H. Kadowaki and H. Nakajima: Acta Mater. Vol. 49 (2001), p.3475.

[6] Y. Nose, N. Terashita, T. Ikeda and H. Nakajima: Acta Mater. Vol. 54 (2006), p.2511.

[7] Y. Mishin: private communication (2002).

[8] U. Brossmann, R. Wurschum, K.A. Badura and H. -E. Schaefer: Phys. Rev. B Vol. 49 (1994), p.6457.

[9] C.L. Fu and M.H. Yoo: Intermetallics Vol. 1 (1993), p.59.

[10] Y. Xia and N.J. Halas: MRS Bulletin Vol. 30 (2005), p.338.

[11] Y. Yin, R.M. Rioux, C.K. Erdonmez, S. Hughes, G.A. Somorjai and A.P. Alivisatos: Science Vol. 304 (2004), p.711.

[12] R. Nakamura, J.G. Lee, D. Tokozakura, H. Mori and H. Nakajima: Mater. Lett. Vol. 61 (2007), p.1060.

[13] R. Nakamura, D. Tokozakura, H. Nakajima, J.G. Lee and H. Mori: J. Appl. Phys. Vol. 101 (2007), p.074303.

[14] R. Nakamura, J.G. Lee, H. Mori and H. Nakajima: Phil. Mag. Vol. 88 (2008), p.257.

[15] B.A. Thompson and R.L. Strong: J. Phys. Chem. Vol. 67 (1963) p.594.

[16] N.L. Peterson and C.L. Wiley: J. Phys. Chem. Solids Vol. 45 (1984), p.281. Fig. 9. TEM images of Ni nanoparticles oxidized (a) at 573 K for 7. 2 ks and (b) at 673 K for 1. 8 ks.

[17] W.J. Moore, Y. Ebisuzaki and J.A. Sluss: J. Phys. Chem. Vol. 62 (1958), p.1438.

[18] W.J. Moore and E.L. Williams: Discussions Faraday Soc. Vol. 28 (1959), p.86.

[19] J.W. Hoffman and I. Lauder: Trans. Faraday Soc. Vol. 66 (1970), p.2346.

[20] M.L. Gall, B. Lesage and J. Bernardini: Phil. Mag. A Vol. 70 (1994), p.761.

[21] D. Prot and C. Monty: Phil. Mag. A, Vol. 73 (1996), p.899.

[22] N. Cabrera and N.F. Mott: Rep. Prog. Phys. Vol. 12 (1948-49), p.163.

[23] A. Atkinson and R. I. Taylor: Phil. Mag. A Vol. 39 (1979), p.581.

[24] K. Maier, H. Mehrer, E. Lessmann and W. Schule: Physica Status Solidi (b) Vol. 78 (1976), p.689.