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Coarsening dynamics in elastically anisotropic alloys

B. Pfau, L.-M. Stadler, B. Sepiol, R. Weinkamer, J. W. Kantelhardt, F. Zontone, and G. Vogl
Phys. Rev. B 73, 180101(R) – Published 3 May 2006

Abstract

We study in situ the coarsening dynamics in elastically anisotropic phase-separating alloys, taking advantage of coherent x rays. Temporally fluctuating speckle intensities are analyzed for two different Ni-Al-Mo samples with different lattice misfits between precipitates and matrix. The detected long-term correlations depend not only on the norm but strongly on the direction of the scattering vector—an unambiguous proof of direction-dependent coarsening dynamics. For strong lattice misfits, our results indicate coalescence of precipitates in the {100} planes.

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  • Received 19 December 2005

DOI:https://doi.org/10.1103/PhysRevB.73.180101

©2006 American Physical Society

Authors & Affiliations

B. Pfau1, L.-M. Stadler1, B. Sepiol1, R. Weinkamer2, J. W. Kantelhardt3, F. Zontone4, and G. Vogl1

  • 1Fakultät für Physik der Universität Wien, Strudlhofgasse 4, A-1090 Wien, Austria
  • 2Max-Planck-Institute of Colloids and Interfaces, D-14424 Potsdam, Germany
  • 3Fachbereich Physik, Martin-Luther-Universität, Halle-Wittenberg, D-06099 Halle (Saale), Germany
  • 4European Synchrotron Radiation Facility—BP 220, F-38043 Grenoble Cedex, France

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Issue

Vol. 73, Iss. 18 — 1 May 2006

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