Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8044168 | Vacuum | 2018 | 25 Pages |
Abstract
The results show that polycrystalline TiN and anatase - TiO2 phases are present in all cases. The electron beam treatment (EBT) leads to a more symmetrical distribution of the heights in comparison with the untreated substrates, as well as to increase in the surface roughness. The hardness of the Ti5Al4V substrates before and after the electron beam treatment process increases which is due to the transformation α+β to αⲠmartensitic microstructure occurring due to the fast cooling rate after the melting process. EBT leads to increase the surface roughness from 8 nm to 25 nm for the deposition of TiN/TiO2 coatings on Ti5Al4V. The treatment of Ti5Al4V substrates leads to decrease in the hardness of the coatings - from 7 GPa to 6 GPa. The scratch tests of the coated samples confirm the decrease of the friction coefficient as compared with the uncoated substrates.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
P. Petrov, D. Dechev, N. Ivanov, T. Hikov, S. Valkov, M. Nikolova, E. Yankov, S. Parshorov, R. Bezdushnyi, A. Andreeva,