Synthesis and investigation of structural-mechanical-tribological properties of c-BN based BN thin films
| Autor: | Efeoğlu, İhsan, Totik, Yaşar, Keleş, Ayşenur, Ersoy, Kıvılcım, Durkaya, Göksel |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Volume: 2, Issue: 1 11-17 Journal of Boron |
| ISSN: | 2149-9020 2667-8438 |
| Popis: | c-BN films arecandidate material to diamond due to their promising properties. Although someproperties of c-BN films are better than diamond, adhesion properties betweenthe substrate and the film are very poor. In this study, c-BN films weredeposited by closed-field unbalanced magnetron sputtering system onto 4140steels in Ar/N2 atmosphere. The c-BN films coated in three differentN2 flow rates. The coated specimens were characterized by SEM andX-ray diffraction techniques. The bonding state of B, N and C elements wereobtained using XPS. The mechanical properties of the c-BN films were tested bymicro-indentation. The adhesion properties between substrate and the film wereinvestigated by using scratch test. The tribological properties were carriedout using pin-on disc in atmospheric conditions. Our results showed that thec-BN films exhibited very dense and columnar microstructure. The maximumcritical load was read 23 N in the softest c-BN film. The maximum and minimumhardness were measured 69 GPa and 33 GPa, respectively. When the hardness wasincreased the friction coefficient was decreased. The lowest frictioncoefficient (0.15) was obtained from the hardest film and the highest frictioncoefficient (0.65) was obtained from the lowest hardness. |
| Databáze: | OpenAIRE |
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