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@proceedings{1410977,
author = {Vašina, Petr and Alishahi, Mostafa and Mirzaei, Saeed and Souček, Pavel and Zábranský, Lukáš and Buršíková, Vilma and Stupavská, Monika and Peřina, Vratislav and Balázsi, Katalin and Czigány, Zsolt},
booktitle = {BIT's 4th Annual World Congress of Smart Materials-2018},
keywords = {magnetron sputtering; nanolaminates; mechanical properties},
language = {eng},
title = {Metal-boron-carbon Based Coatings-novel Material with High Hardness and Fracture Resistance},
year = {2018}
}
TY - CONF
ID - 1410977
AU - Vašina, Petr - Alishahi, Mostafa - Mirzaei, Saeed - Souček, Pavel - Zábranský, Lukáš - Buršíková, Vilma - Stupavská, Monika - Peřina, Vratislav - Balázsi, Katalin - Czigány, Zsolt
PY - 2018
TI - Metal-boron-carbon Based Coatings-novel Material with High Hardness and Fracture Resistance
KW - magnetron sputtering
KW - nanolaminates
KW - mechanical properties
N2 - Nowadays used hard protective coatings are often based on ceramics. They generally exhibit high hardness and high stiffness, however, these positive features are often accompanied by negative brittle deformation behaviour. If a crack is formed, it can easily and rapidly spread which can lead to a sudden premature failure of the coating as well as the whole coated tool. The current trend in surface engineering is to sacrifice some of the hardness in favour of enhanced ductility and fracture toughness. According to the ab-initio models, boron and carbon-based nanolaminates such as Mo2BC should exhibit an unusual combination of high stiffness and moderate ductility. Nanolaminates with tantalum, tungsten and molybdenum were predicted to exhibit the best mechanical properties making them the best candidates for experimental synthesis. These materials (Mo-B-C, W-B-C and Ta-BC) were sputter deposited at moderate temperatures employing DCMS or HiPIMS. The coatings are prepared in a fully amorphous form, as nanocomposite system and also in a fully crystalline form. The hardness of these coatings was higher than 20 GPa and the fracture resistance of the coatings is shown to be significantly enhanced compared to the state-of-the-art protective coatings such as TiN or TiAlN.
ER -
VAŠINA, Petr, Mostafa ALISHAHI, Saeed MIRZAEI, Pavel SOUČEK, Lukáš ZÁBRANSKÝ, Vilma BURŠÍKOVÁ, Monika STUPAVSKÁ, Vratislav PEŘINA, Katalin BALÁZSI a Zsolt CZIGÁNY. Metal-boron-carbon Based Coatings-novel Material with High Hardness and Fracture Resistance. In \textit{BIT's 4th Annual World Congress of Smart Materials-2018}. 2018.
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