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Magnetron sputtered W-B-C coatings

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

Rok publikování 2017
Druh Konferenční abstrakty
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
Popis 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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