Detailed Information on Publication Record
2018
Tribological properties of WBC protective coatings prepared by magnetron sputtering
DEBNÁROVÁ, Stanislava, Pavel SOUČEK, Petr VAŠINA, Lukáš ZÁBRANSKÝ, Vilma BURŠÍKOVÁ et. al.Basic information
Original name
Tribological properties of WBC protective coatings prepared by magnetron sputtering
Authors
DEBNÁROVÁ, Stanislava (703 Slovakia, belonging to the institution), Pavel SOUČEK (203 Czech Republic, belonging to the institution), Petr VAŠINA (203 Czech Republic, belonging to the institution), Lukáš ZÁBRANSKÝ (203 Czech Republic, belonging to the institution), Vilma BURŠÍKOVÁ (203 Czech Republic, belonging to the institution), Saeed MIRZAEI (364 Islamic Republic of Iran, belonging to the institution) and Yutao PEI
Edition
The 83rd IUVSTA Workshop, 2018
Other information
Language
English
Type of outcome
Konferenční abstrakt
Field of Study
10305 Fluids and plasma physics
Country of publisher
Sweden
Confidentiality degree
není předmětem státního či obchodního tajemství
RIV identification code
RIV/00216224:14310/18:00101157
Organization unit
Faculty of Science
Keywords in English
magnetron sputtering; thin films; protective coatings; W-B-C; tribological properties
Změněno: 11/9/2018 17:22, Mgr. Stanislava Debnárová, Ph.D.
Abstract
V originále
W2BC is a promising new material for fracture resistant protective coatings due to its high hardness and moderate ductility as predicted per ab initio calculations [1]. Three sets of W-B-C coatings with stoichiometry close to W2BC were deposited using mid-frequency pulsed-DC magnetron sputtering with differing deposition parameters. The effect of the coating composition and the deposition parameters on the structure and mechanical properties of the coatings was investigated. The lack of sharp peaks in the X-ray diffractogram indicated a prevalently amorphous nature of the coatings. The hardness of the prepared coatings ranged from 21.5 to 27 GPa. Coatings prepared at elevated temperature generally exhibited higher hardness than that of the coatings prepared at ambient temperature. The main focus of this work was placed on the tribological study of these coatings. The influence of the deposition conditions on the coefficient of friction and wear was examined. The coefficient of friction increased with the increasing amount of W and decreasing amount of B for coatings prepared at ambient as well as elevated temperature. Coatings prepared at elevated temperature have shown a significantly lower wear when a 100Cr6 steel counterpart ball was used, compared to the harder ceramic Si3N4 ball. Furthermore, the influence of the measuring temperature on the tribological properties of the coatings was investigated during high temperature tests. The coefficient of friction decreased when the temperature of the substrate during measurement reached 500 – 600°C. XRD measurements after high temperature tests have shown that this decrease was due to the formation of W-O Magnéli phases, which acted as a solid-state lubricant. This self-lubricating property could be useful in tribological applications without cooling or additional lubrication where high working temperatures are common.
Links
| GA15-17875S, research and development project |
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| LO1411, research and development project |
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