Growth of magnesio-aluminate spinel in thin-film geometry
- Author(s)
- L. C. Goetze, R. Abart, R. Milke, S. Schorr, I. Zizak, R. Dohmen, R. Wirth
- Abstract
Polycrystalline spinel layers were grown experimentally at the contacts between single-crystal corundum substrates and initially amorphous, then polycrystalline MgO thin films. The growth behavior of the spinel layers was monitored in situ using synchrotron X-ray diffraction. The change in the integrated intensity of the 111 spinel Bragg peak was correlated with the thickness of the layer as determined from ex situ TEM characterization of the run products. At 900 ∘C a transition from linear growth, corresponding to interface reaction control, to parabolic growth, corresponding to diffusion control, occurred at a layer thickness of less than 10 nm. At 1,000 ∘C growth was largely linear up to a layer thickness in excess of 300 nm. A thermodynamic model was applied to extract the kinetic parameters characterizing interface motion and long-range diffusion from this growth behavior.
- Organisation(s)
- Department of Lithospheric Research
- External organisation(s)
- Freie Universität Berlin (FU), Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum, Helmholtz-Zentrum Berlin für Materialien und Energie, Ruhr-Universität Bochum (RUB)
- Journal
- Physics and Chemistry of Minerals
- Volume
- 41
- Pages
- 681-693
- No. of pages
- 13
- ISSN
- 0342-1791
- DOI
- https://doi.org/10.1007/s00269-014-0682-0
- Publication date
- 10-2014
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 105116 Mineralogy, 105120 Petrology
- Keywords
- ASJC Scopus subject areas
- Geochemistry and Petrology, General Materials Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/c3d01d76-beed-40f7-8ad5-768cb3df11e9