Coarsening dynamics in elastically anisotropic alloys

Journal Article · Mon May 01 00:00:00 EDT 2006 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.73.1· OSTI ID:20788167

Pfau, B; Stadler, L -M; Sepiol, B; Vogl, G ^[1]; Weinkamer, R ^[2]; Kantelhardt, J W ^[3]; Zontone, F ^[4]

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

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 {l_brace}100{r_brace} planes.

• OSTI ID: 20788167
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 18 Vol. 73; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM ALLOYS
ANISOTROPY
COALESCENCE
CORRELATIONS
ELASTICITY
MOLYBDENUM ALLOYS
NICKEL ALLOYS
VECTORS
X RADIATION
X-RAY DIFFRACTION