Effect of nitrogen content on high-temperature stability of hard and optically transparent amorphous Hf-Y-Si-B-C-N coatings. Issue 4 (15th February 2023)

• Record Type: Journal Article
• Authors: Farhadizadeh, A.; Vlček, J.; Houška, J.; Haviar, S.; Čerstvý, R.; Červená, M.; Zeman, P.; Matas, M.
• Is Part Of: Ceramics international. Volume 49:Issue 4(2023)
• Page Start: 6086
• Page End: 6093
• Publication Date: 2023-02-15
• Subjects: Thermal stability -- Oxidation resistance -- Optical properties -- Hardness -- Ab-initio simulations; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.10.250
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: We study the effect of nitrogen content on functional properties, thermal stability and oxidation resistance of hard and optically transparent amorphous Hf-Y-Si-B-C-N coatings prepared by pulsed magnetron sputtering. Ab-initio simulations are performed to link the experimentally obtained properties with the atomic and electronic structures of the fabricated materials. It is shown that the content of N in the material, varied from subsaturation 46 at.% to saturation 51 at.%, is of significant importance for the optimization of thermal stability and tuning the refractive index and extinction coefficient. We identify an optimum N2 content in the plasma and in turn N content in the coatings which outperform the previously introduced high-temperature material Hf6 Y2 Si29 B12 C2 N45 . The results constitute a progress in the efforts to combine multiple functional properties with exceptional (above 1300 °C) thermal stability and oxidation resistance.