The effects of carbon and nitrogen incorporation on the structure, mechanical properties and superconducting transition temperature of (NbMoTaW)100-z(CN)z coatings
IF 2 4区 材料科学Q3 MATERIALS SCIENCE, COATINGS & FILMS
František Lofaj , Petra Hviščová , Gabriel Pristáš , Jozef Dobrovodský , Dmitry Albov , Maksym Lisnichuk , Slavomír Gabáni , Karol Flachbart
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引用次数: 0
Abstract
Studies of the effects of nitrogen and carbon concentration on reactive DC magnetron sputtered (NbMoTaW)100-z(CN)z coatings reveal that nitrogen and carbon are actively incorporated into the cubic sub-lattice of metals until saturation is achieved above 4 sccm of N2 flow. The hardness and indentation modulus of the studied coatings strongly depend on the concentration of nitrogen and carbon. Maximum hardness values of around 50 GPa, considerably exceeding the superhardness limit of 40 GPa, are achieved when the sum of nitrogen and carbon concentration approaches 50 at %. The content of nitrogen and carbon also influences the superconducting transition temperature Tc. Nevertheless, it turns out that the carbon concentration has a decisive influence on the observed Tc changes. The reason is probably the lower atomic mass of carbon compared to nitrogen and the increase of the electron-phonon interaction due to the different bonding of carbon (compared to N) to the metallic sub-lattice.
期刊介绍:
Thin Solid Films is an international journal which serves scientists and engineers working in the fields of thin-film synthesis, characterization, and applications. The field of thin films, which can be defined as the confluence of materials science, surface science, and applied physics, has become an identifiable unified discipline of scientific endeavor.