Thermally activated transformations in metastable alumina coatings prepared by magnetron sputtering

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F14%3A43921137" target="_blank" >RIV/49777513:23520/14:43921137 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.surfcoat.2013.12.004" target="_blank" >http://dx.doi.org/10.1016/j.surfcoat.2013.12.004</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.surfcoat.2013.12.004" target="_blank" >10.1016/j.surfcoat.2013.12.004</a>

Result language
angličtina
Original language name
Thermally activated transformations in metastable alumina coatings prepared by magnetron sputtering
Original language description
The present study focuses on characterization of transformation processes and understanding of transformation phenomena in magnetron sputtered alumina coatings with different as-deposited structures. Phase transformation sequences with thermodynamic andkinetic data were systematically analyzed by means of differential scanning calorimetry and ex-situ X-ray diffraction. It was found that thermal stability of a pure gamma-phase as-deposited structure exceeds 1100 °C. On the contrary, an amorphous as-deposited structure is thermally stable to approximately 900 °C when the amorphous to gamma phase transformation starts proceeding. Independently of as-deposited structure, the metastable gamma phase transforms to the stable alpha phase at temperature of approximately 1200 °C. Further, it was shown that the changes in transformation enthalpies for all observed transformations are close to each other while the kinetic of the phase transformations is influenced by the as-deposited structure of
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BL - Plasma physics and discharge through gases
OECD FORD branch
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Project
<a href="/en/project/GAP108%2F12%2F0393" target="_blank" >GAP108/12/0393: Hard nanocomposite coatings with enhanced toughness and unique properties</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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