Publication details

Magnetron sputtered W-B-C coatings

Authors

MIRZAEI Saeed ALISHAHI Mostafa SOUČEK Pavel ZÁBRANSKÝ Lukáš BURŠÍKOVÁ Vilma PEŘINA Vratislav VAŠINA Petr

Year of publication 2017
Type Conference abstract
MU Faculty or unit

Faculty of Science

Citation
Description In the present work, the microstructure and mechanical properties of new boron carbide family WBC thin films were studied, experimentally. A series of nanostructured W-B-C films were deposited by magnetron co-sputtering of W, B4C and C targets. The mechanical behavior of prepared films was analyzed by different nanoindentation techniques. Their composition has been analyzed by using Energy-dispersive X-ray spectroscopy (EDS) and Rutherford backscattering spectrometry (RBS). The incorporation of tungsten and carbon content in the films were in the range of 41-60.9 and 7.1-27.7 at %, respectively. It is illustrated that, as the carbon to tungsten ratio (C/W) increases, the growth of the films experiences a transition from the granular structure into porous columnar one which accompanies by initiation of cracks first in the corner then on the side of the indents. In addition, as a result of decreae in the C/W content, the hardness and reduced elastic modulus of the coatings are increasing considerably from 21.6 to 28.4 GPa and 299 to 346 GPa, respectively.
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