In Situ Measurements of Magnetically Driven Grain Boundary Migration in Zn Bicrystals

Abstract:

The results of investigations of magnetically driven grain boundary migration in high purity (99.995%) zinc bicrystals are presented. In-situ measurements were conducted by means of a specially designed and fabricated polarization microscopy probe. The migration of planar tilt grain boundaries with various misorientation angles in the range between 60° and 90° was studied. The absolute grain boundary mobility and its temperature dependence was measured in the regime between 330°C and 415°C and the corresponding migration activation parameters were determined. The results revealed that there is a pronounced misorientation dependence of grain boundary mobility in the investigated angular range. The migration activation enthalpy was found to vary between 1.18 eV and 2.15 eV. The obtained activation parameters comply with the compensation law, i.e. the migration activation enthalpy changes linearly with the logarithm of the pre-exponential factor.

• Periodical: Materials Science Forum (Volumes 715-716)
• Pages: 467-472
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.715-716.467
• Online since: April 2012
• Authors: Christoph Günster, Dmitri A. Molodov, Günter Gottstein
• Keywords: Bi-Crystal, Grain Boundary Mobility, In Situ Observation, Magnetic Driving Force

References

[1] V. G. Sursaeva, A. V. Andreeva, Ch. V. Kopezkii and L. S. Shvindlerman: Fiz. Met. Metall. Vol. 41 (1976), p.98.

[2] B. B. Straumal, V. G. Sursaeva and L. S. Shvindlerman: Fiz. Met. Metall. Vol. 49 (1980), p.102.

[3] V. G. Sursaeva, B. B. Straumal, A. S. Gornakova, L. S. Shvindlerman and G. Gottstein: Acta Mater. Vol. 56 (2008), p.2728.

DOI: 10.1016/j.actamat.2008.02.014

[4] W. W. Mullins, Acta Metall., Vol. 4 (1956), p.421.

[5] M. J. Fraser, R. E. Gold and W. W. Mullins: Acta Metall., Vol. 9 (1961), p.960.

[6] D. A. Molodov, G. Gottstein, F. Heringhaus, L. S. Shvindlerman: Scripta Mater., Vol. 37 (1997), p.1207.

DOI: 10.1016/s1359-6462(97)00227-3

[7] D. A. Molodov, G. Gottstein, F. Heringhaus, L. S. Shvindlerman: Acta Mater., Vol. 46 (1998), p.5627.

[8] P. J. Konijnenberg, D. A. Molodov and G. Gottstein: Mater. Sci. Forum Vol. 467-470 (2004), p.763.

[9] D. A. Molodov: Mater. Sci. Forum Vol. 467-470 (2004), p.697.

[10] D. A. Molodov and P. J. Konijnenberg: Z. Metallkd. Vol. 96 (2005), p.1158.

[11] D. A. Molodov and P. J. Konijnenberg: Scripta Mater. Vol. 54 (2006), p.977.

[12] A. D. Sheikh-Ali, D. A. Molodov and H. Garmestani: Appl. Phys. Lett. Vol. 82 (2003), p.3005.

[13] A. D. Sheikh-Ali, D. A. Molodov, H. Garmestani: Scripta Mater. Vol. 48 (2003), p.483.

[14] P. J. Konijnenberg, A. Ziemons, D. A. Molodov and G. Gottstein: Rev. Sci. Instrum. Vol. 79 (2008), p.013701.

[15] D. A. Molodov, V. A. Ivanov and G. Gottstein: Acta Mater. Vol. 55 (2007), p.1843.

[16] D. A. Molodov, U. Czubayko, G. Gottstein and L. S. Shvindlerman: Acta Mater., Vol. 46 (1998), p.553.

[17] G. Gottstein, D. A. Molodov, U. Czubayko and L. S. Shvindlerman: J. de Phys. IV Vol. 5 (1995), p.89.

[18] L. S. Shvindlerman, G. Gottstein and D. A. Molodov: Phys. Stat. Sol. Vol. 160 (1997), p.419.

[19] G. Gottstein and L. S. Shvindlerman: Interface Sci. Vol. 6 (1998), p.265.