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Preparation of coatings simultaneously exhibiting high hardness and enhanced fracture resistance is a hot topic, as nowadays used ceramic protective coatings show difficulties to cope with increased demands due to their inherent brittleness. Material exhibiting seemingly contradictory combination of mechanical properties-high hardness and moderate ductility enhancing the fracture resistance-was recently predicted by ab initio calculations in the crystalline X2BC system. The presented study is focussed on the study of the influence of the C/W ratio on the microstructure, the content of different chemical bonds and the mechanical properties of W-B-C coatings prepared by magnetron sputtering at moderate temperature. It was shown that change of the deposition conditions to achieve different C/W ratios influences the energy flux and momentum transfer to the coating. The coating with the lowest C/W ratio experienced the highest energy flux and momentum transfer, which resulted in a dense coating microstructure. The microstructure progressively coarsened as the C/W ratio increased, i.e. as

The tribological properties of short range ordered W-B-C protective coatings prepared by pulsed magnetron sputtering Debnarova, S.

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