Resistivity changes of magnetron sputtered, amorphous CrAlC thin films were measured during heating in vacuum. Based on correlative X-ray diffraction, in-situ and ex-situ selected area electron diffraction measurements and differential scanning calorimetry data from literature it is evident that the resistivity changes at 552 ± 4 and 585 ± 13 °C indicate the phase transitions from amorphous to a hexagonal disordered solid solution structure and from the latter to MAX phase, respectively. We have shown that phase changes in CrAlC thin films can be revealed by in-situ measurements of thermally induced resistivity changes.
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http://dx.doi.org/10.1038/s41598-019-44692-4 | DOI Listing |
Nanomaterials (Basel)
November 2022
National Institute for Materials Physics, P.O. Box MG-7, 077125 Magurele, Romania.
The microcrystallization effects induced by the real-time laser annealing in Cr-Al-C ion-sputtered films with an off-stoichiometric composition are studied. The laser annealing has been performed during Raman experiments with tunable laser power densities. Morphostructural changes induced during laser annealing were investigated by scanning electron microscopy.
View Article and Find Full Text PDFNanomaterials (Basel)
September 2022
National Institute for Materials Physics, P.O. Box MG-7, 077125 Magurele, Romania.
Intermetallic Cr-Al-C thin films from the 211 class of MAX phases were fabricated via ion beam deposition and structural investigations were undertaken to obtain information about morpho-structural effects propelled by carbon excess in the stoichiometry of the films. In order to promote the occurrence of the CrAlC MAX phase, the stoichiometric thin films were subsequently annealed at two temperature values: 650 °C and 700 °C in UHV conditions for 30 min. The morpho-structural effects in both as-deposited and annealed films were monitored using scanning electron microscopy, X-ray diffraction, and Raman spectroscopy.
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