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Interplay between the local structural disorder and the length of structural coherence in stabilizing the cubic phase in nanocrystalline ZrO2 |
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| Authors: | Milen Gateshki Taeghwan Hyeon Markus Niederberger |
| Institution: | a Department of Physics, Central Michigan University, Mt Pleasant, MI 48859, USA b National Creative Research Initiative Center for Oxide Nanocrystalline Materials and School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744, South Korea c Max-Planck Institute of Colloids and Interfaces, Potsdam D-14424, Germany d Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA |
| Abstract: | The atomic-scale structure of three nanocrystalline ZrO2 samples obtained by different techniques and possessing a different length of structural coherence has been studied using high-energy X-ray diffraction and the atomic pair distribution function technique. The studies reveal that all samples show a monoclinic-like local atomic ordering. Only when the length of structural coherence exceeds 1 nm the atomic arrangement evolves into a cubic-type one. The result underlines the importance of both the local structural disorder and the length of structural coherence, i.e. the spatial extent of longer-range atomic order, in stabilizing the technologically important cubic zirconia at room temperature. |
| Keywords: | 61 10 Nz 81 07 Bc |
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