Diffusion in L1₀-Type Single Crystal TiAl and FePt Intermetallic Compounds

Abstract:

The diffusion coefficient of In in TiAl has been measured using ion implantation technique and secondary ion mass spectrometry. The diffusion coefficients of Fe and Pd in FePt have been measured at two compositions by radioactive tracer method. In order to clarify diffusion anisotropy, single crystal of each alloy was used. The In diffusion perpendicular to the [001] axis is faster than that parallel to the [001] axis. Such trend is similar to Ti diffusion previously measured in our group. The diffusion of Fe in FePt perpendicular to the [001] axis is faster than that parallel to the [001] axis at each composition, while the anisotropy of the Pd diffusion is different with composition. The predominant process of the diffusion in perpendicular to the [001] has been discussed on the basis of the expressions of the diffusion coefficients.

• Periodical: Defect and Diffusion Forum (Volumes 237-240)
• Pages: 7-18
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.237-240.7
• Online since: April 2005
• Authors: Hideo Nakajima, Y. Nosé, N. Terashita, Teruyuki Ikeda, Hiroshi Numakura
• Keywords: Diffusion Anisotropy, Intermetallic Compound (IMC), L1₀-Type Structure, Order-Disorder Alloy, Secondary Ion Mass Spectroscopy (SIMS), Tracer Diffusion

References

[1] C. Herzig T. Przeorsky and Y. Mishin: Intermettalics 7 (1998), 389.

[2] S. Kroll, N. A. Stolwijk, C. Herzig and H. Mehrer: Defect Diff. Forum 95-98 (1993), 865.

DOI: 10.4028/www.scientific.net/ddf.95-98.865

[3] C. Herzig M. Friesel, D. Derdau and S. V. Divinski: Intermettalics 7 (1999), 1141.

[4] Y. Mishin and C. Herzig: Acta mater. 48 (2000), 589.

[5] Y. Iijima, C. G. Lee, S. E. Kim, Y. T. Lee and H. M. Kim: High Temp. Mater. Process. 18 (1999), 305.

[6] T. Ikeda, H. Kadowaki, H. Nakajima, H. Inui and M. Yamaguchi: Mater. Sci. Eng. A 312 (2001), 155.

[7] T. Ikeda, H. Kadowaki and H. Nakajima: Acta mater. 49 (2001), 3475.

[8] J. Kucera and B. Million: Phys. Status. Solidi (a) 31 (1975), 275.

[9] T. Ichitsubo, M. Nakamoto, K. Tanaka and M. Koiwa: Mater. Trans. JIM 39 (1998), 24.

[10] P. Shewmon: Diffusion in Solids, (McGraw-Hill, New York, 1963), P. 32.

[11] M. J. Elliot and W. Rostoker: Acta Metall. 2 (1954), 884.

[12] D. Vujic, Z. Li and S. H. Whang: Metall. Trans. A 19 (1988), 2445.

[13] Y. Shirai and M. Yamaguchi: Mater. Sci. Eng. A 152 (1992), 173.

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

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

[16] K. A. Badura and H. -E. Schaefer: Z. Metallkd. 84 (1993), 405.

[17] S. Raju, E. Mohandas and V. S. Raghunathan: Scripta Mater. 34 (1996), 585.

[18] C. Woodward and S. Kajiwara: Acta Mater. 14 (1999), 3793.

[19] Y. Song, Z. X. Guo and R. Yang: J. Light Metals 2 (2002), 115.

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

[21] N. Terashita, Y. Nose, T. Ikeda, H. Nakajima, H. Inui and M. Yamaguchi: Mater. Lett. 57 (2003), 3357.

[22] Y. Nose, N. Terashita, T. Ikeda and H. Nakajima: to be published.

[23] T. Ikeda, H. Numakura, M. Koiwa: Acta Mater. 46 (1998), 6605; ibid. 47 (1999), (1993).

[24] H. Numakura, T. Ikeda, M. Koiwa and A. Almazouzi: Philos. Mag. A 6 (1998), 1455.