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Phase transformations in face centered cubic (Al0.32Cr0.68)(2)O-3 thin films
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.ORCID iD: 0000-0003-1785-0864
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2012 (English)In: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 206, no 14, 3216-3222 p.Article in journal (Refereed) Published
Abstract [en]

Face centered cubic (Al0.32Cr0.68)(2)O-3 thin films have been annealed in the temperature range of 500-1000 degrees C during 2-8 h. The fcc structure of the film remains intact when annealed at temperatures up to 700 degrees C for 8 h. X-ray diffraction and transmission electron microscopy show the onset of phase transformation to corundum phase alloys in the sample annealed at 900 degrees C for 2 h, where annealing at 1000 degrees C for 2 h results in complete phase transformation to alpha-(Al0.32Cr0.68)(2)O-3. In-plane and out-of-plane line scans performed in EDX TEM and theta/2 theta XRD patterns did not show any phase separation into alpha-Cr2O3 and Al2O3 prior and after the annealing. The apparent activation energy of this process is 380-480 kJ/mol as determined by the Johnson-Mehl-Avrami model.

Place, publisher, year, edition, pages
Elsevier , 2012. Vol. 206, no 14, 3216-3222 p.
Keyword [en]
fcc Al-Cr-O alloys, Phase transformation kinetics, Corundum solid solution, Annealing
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-76809DOI: 10.1016/j.surfcoat.2012.01.008ISI: 000301903100009OAI: oai:DiVA.org:liu-76809DiVA: diva2:516827
Note

Funding Agencies|Swedish Research Council (VR)||

Available from: 2012-10-15 Created: 2012-04-20 Last updated: 2017-12-07Bibliographically approved

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Khatibi, AliLu, JunJensen, JensEklund, PerHultman, Lars

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