Micro- and nanostructure of a titanium surface electric-spark-doped with tantalum and modified by high-frequency currents
- Authors: Fomin A.A.1, Fomina M.A.1, Koshuro V.A.1, Rodionov I.V.1, Voiko A.V.1, Zakharevich A.M.2, Aman A.3,4, Oseev A.3,4, Hirsch S.3,4, Majcherek S.3,4
-
Affiliations:
- Yuri Gagarin State Technical University of Saratov
- Saratov State University
- University of Applied Sciences
- Otto-von-Guericke University
- Issue: Vol 42, No 9 (2016)
- Pages: 932-935
- Section: Article
- URL: https://journals.rcsi.science/1063-7850/article/view/201191
- DOI: https://doi.org/10.1134/S1063785016090170
- ID: 201191
Cite item
Abstract
We have studied the characteristics of the porous microstructure of tantalum coatings obtained by means of electric spark spraying on the surface of commercial grade titanium. It is established that, at an electric spark current within 0.8–2.2 A, a mechanically strong tantalum coating microstructure is formed with an average protrusion size of 5.1–5.4 µm and pore sizes from 3.5 to 9.2 µm. On the nanoscale, a structurally heterogeneous state of coatings has been achieved by subsequent thermal modification at 800–830°C with the aid of high-frequency currents. A metal oxide nanostructure with grain sizes from 40 to 120 nm is formed by short-time (~30 s) thermal modification. The coating hardness reaches 9.5–10.5 GPa at an elastic modulus of 400–550 GPa.
About the authors
A. A. Fomin
Yuri Gagarin State Technical University of Saratov
Author for correspondence.
Email: afominalex@rambler.ru
Russian Federation, Saratov, 410054
M. A. Fomina
Yuri Gagarin State Technical University of Saratov
Email: afominalex@rambler.ru
Russian Federation, Saratov, 410054
V. A. Koshuro
Yuri Gagarin State Technical University of Saratov
Email: afominalex@rambler.ru
Russian Federation, Saratov, 410054
I. V. Rodionov
Yuri Gagarin State Technical University of Saratov
Email: afominalex@rambler.ru
Russian Federation, Saratov, 410054
A. V. Voiko
Yuri Gagarin State Technical University of Saratov
Email: afominalex@rambler.ru
Russian Federation, Saratov, 410054
A. M. Zakharevich
Saratov State University
Email: afominalex@rambler.ru
Russian Federation, Saratov, 410012
A. Aman
University of Applied Sciences; Otto-von-Guericke University
Email: afominalex@rambler.ru
Germany, Brandenburg, 14770; Magdeburg, 31106
A. Oseev
University of Applied Sciences; Otto-von-Guericke University
Email: afominalex@rambler.ru
Germany, Brandenburg, 14770; Magdeburg, 31106
S. Hirsch
University of Applied Sciences; Otto-von-Guericke University
Email: afominalex@rambler.ru
Germany, Brandenburg, 14770; Magdeburg, 31106
S. Majcherek
University of Applied Sciences; Otto-von-Guericke University
Email: afominalex@rambler.ru
Germany, Brandenburg, 14770; Magdeburg, 31106