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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 367Self and Chemical Diffusion in Liquid Al-Ag

Self and Chemical Diffusion in Liquid Al-Ag

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Abstract:

Self-and chemical diffusion coefficients are reported for molten Al-Ag on the Al-rich side of the phase diagram for Ag concentrations of up to 45at% and for pure liquid Ag. Temperature dependent Ag self-diffusion coefficients were obtained using quasi-elastic neutron scattering. Chemical diffusion coefficients were measured in situ by means of X-ray radiography of a long-capillary furnace. A detailed error analysis for the long-capillary experiments is reported. It is shown that perturbing effects can be detected and that accurate chemical diffusion coefficients can be measured with high precision. It is demonstrated based on Al-Ag20at% that the Darken equation appears to be valid for this system with a thermodynamic factor lower than unity. Furthermore, in Al-Ag it appears that Ag self-diffusion for small Ag concentrations is faster than Al-self-diffusion in liquid Al. This contrasts with observations made for other Al-based melts like Al-Ni and Al-Cu.

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Defect and Diffusion Forum (Volume 367)

Pages:

157-166

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.367.157

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Online since:

April 2016

Authors:

Marc Engelhardt, Andreas Meyer, F. Yang, G.G. Simeoni, Florian Kargl

Keywords:

Chemical-Diffusion, Darken Relation, Liquid Metal Alloys, Quasi-Elastic Neutron Scattering, Self-Diffusion, X-Ray Radiography

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[1] V. T. Witusiewicz, U. Hecht, S. G. Fries and S. Rex, J. Alloys Comp. Vol. 385 (2004), p.133.

[2] V. T. Witusiewicz, U. Hecht, S. G. Fries, S. Rex, J. Alloys Comp. Vol. 385 (2004), p.217.

[3] A. Genau and L. Ratke, Int. J. Mat. Res. Vol. 103 (2012), p.469.

[4] A. Dennstedt and L. Ratke, Trans. Ind. Inst. Metals Vol. 65 (2012), p.777.

[5] A. Dennstedt, L. Ratke, A. Choudhury and B. Nestler, Metall. Microstruct. Anal. Vol. 2 (2013), p.140.

[6] J. Hotzer, M. Jainta, P. Steinmetz, B. Nestler, A. Dennstedt, A. Genau, M. Bauer, H. Koestler and U. Rude, Acta Mater. Vol 93 (2015), p.194.

DOI: 10.1016/j.actamat.2015.03.051

[7] Y. Du, Y. A. Chang, B. Huang, W. Gong, Z. Jin, H. Xu, Z. Yuan, Y. Liu, Y. He and F. -Y. Xie, Mat. Sci. Eng. A Vol. 363 (2003), p.140.

[8] Y. Du, L. J. Zhang, S. L. Cui, D. D. Zhao, D. D. Liu, W. B. Zhang, W. H. Sun and W. Q. Jie, Sci. China-Technol. Sci. Vol. 55 (2012), p.306.

[9] B. Zhang, A. Griesche and A. Meyer, Phys. Rev. Lett. Vol. 104 (2010), 035902.

[10] F. Kargl, M. Engelhardt, F. Yang, P. Schmakat, B. Schillinger, A. Griesche and A. Meyer, J. Phys.: Condens. Matter Vol. 23 (2011), 254201.

DOI: 10.1088/0953-8984/23/25/254201

[11] F. Kargl, E. Sondermann, H. Weis, and A. Meyer, High Temp. -High Press. Vol. 42 (2013), p.3.

[12] A. Griesche, B. Zhang, E. Solórzano, and F. Garcia-Moreno, Rev. Sci. Instrum. Methods Vol. 81 (2010), 056104.

[13] A. Meyer, EPJ Web of Conf. Vol. 83 (2015), 01002.

[14] G.G. Simeoni, R. G. Valicu, G. Borchert, P. Böni, N. G. Rasmussen, F. Yang, F. Kordel, D. Holland-Moritz, F. Kargl and A. Meyer, Appl. Phys. Lett. (accepted).

DOI: 10.1063/1.4938071

[15] M. Engelhardt, Diffusion of mass in liquid AlCuAg and the binary subsystems, PhD thesis RWTH Aachen University (2014).

[16] A. Bruson and M. Gerl, Phys. Rev. B Vol. 21 (1980), p.5447.

[17] G. Mathiak, A. Griesche, K. H. Kraatz and G. Frohberg, J. Non-Cryst. Solids Vol. 205 (1996), p.412.

DOI: 10.1016/s0022-3093(96)00253-0

[18] A. Griesche, M. -P. Macht and G. Frohberg, J. Non-Cryst. Solids Vol. 353 (2007), p.3305.

[19] R. M. Banish and L. B. Jalbert, Adv. Space Res. Vol. 24 (1999), p.1311.

[20] B. A. Beer, Annalen der Physik Vol. 86 (1952), p.78.

[21] A. Griesche, F. Garcia-Moreno, M. Macht, and G. Frohberg, Mat. Sci. Forum Vol. 508 (2006), p.567.

DOI: 10.4028/www.scientific.net/msf.508.567

[22] H. Weis, Struktur und Dynamik in flüssigem Germanium und Silizium-Germanium, PhD thesis, Ruhr Universität Bochum (2012).

[23] F. Kargl, H. Weis, T. Unruh, and A. Meyer J. Phys.: Conf. Series Vol. 340 (2012), 012077.

[24] S. K. Das, J. Horbach, M. M. Koza, S. Mavila Chatoth, and A. Meyer, Appl. Phys. Lett. Vol. 86 (2005), 011918.

DOI: 10.1063/1.1845590

[25] J. Horbach, S. K. Das, A. Griesche, M. -P. Macht, G. Frohberg, and A. Meyer, Phys. Rev. B Vol. 75 (2007), 174304.

[26] L. S. Darken, Trans. AIME Vol. 175 (1948), p.184.

[27] E. Sondermann, F. Kargl, T. Unruh, and A. Meyer, submitted to Phys. Rev. Lett. (2015).

[28] A. Meyer, Phys. Rev. B Vol. 81 (2010), 012102.

[29] A. Meyer, S. Stüber, D. Holland-Moritz, O. Heinen, and T. Unruh, Phys. Rev. B Vol. 77 (2008), 092201.

[30] F. Kargl et al. (in preparation).