Structure of Ti-Ta Alloys Fabricated by Electron-beam Surface Alloying

Authors

  • Maria Ormanova Institute of Electronics, Bulgarian Academy of Sciences
  • Georgi Kotlarski Institute of Electronics, Bulgarian Academy of Sciences
  • Ruslan Bezdushnyi Faculty of Physics, Sofia University “St. Kliment Ohridski”, Bulgaria
  • Nikolay Ivanov Institute of Electronics, Bulgarian Academy of Sciences
  • Dimitar Dechev Djakov Institute of Electronics, Bulgarian Academy of Sciences
  • Stefan Valkov Institute of Electronics, Bulgarian Academy of Sciences and Department of Mathematics, Informatics and Natural Sciences, Technical University of Gabrovo

DOI:

https://doi.org/10.7546/CRABS.2022.09.04

Keywords:

Ti-Ta alloys, electron-beam surface alloying, phase composition, microstructure

Abstract

In the present study, Ta coatings with a thickness of 1.7 and 4.2 μm were deposited on Ti samples through reactive magnetron sputtering. The coatings are furthermore treated by a scanning electron beam in order to form the Ti-Ta surface alloy. A change in the phase composition of the Ti-Ta alloy was observed through X-ray diffraction (XRD). The microstructure and the chemical composition of the samples were studied via scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The results indicate that in both cases the thickness of the alloyed zone remains the same at about 50 μm. The concentration of Ta in the alloyed zone increases with the increase in thickness of the pre-applied coating. The sample with the 1.7 μm Ta coating has a single-phase hexagonal closed packed structure, corresponding to the \(\alpha \)  phase, whilst the sample with the 4.2 μm coating exhibits a biphasic hexagonal closed-packed structure and a body-centred cubic structure, corresponding to \(\alpha '\) martensitic and β phases. 

Author Biographies

Maria Ormanova, Institute of Electronics, Bulgarian Academy of Sciences

Mailing Address:
Acad. Emil Djakov Institute of Electronics,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse
1784 Sofia, Bulgaria

E-mail: m.ormanova@ie.bas.bg

Georgi Kotlarski, Institute of Electronics, Bulgarian Academy of Sciences

Mailing Address:
Acad. Emil Djakov Institute of Electronics,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse
1784 Sofia, Bulgaria

E-mail: gvkotlarski@gmail.com

Ruslan Bezdushnyi, Faculty of Physics, Sofia University “St. Kliment Ohridski”, Bulgaria

Mailing Address:
Faculty of Physics,
Sofia University “St. Kliment Ohridski”
5 James Bourchier Blvd
1164, Sofia, Bulgaria

E-mail: rb@phys.uni-sofia.bg

Nikolay Ivanov, Institute of Electronics, Bulgarian Academy of Sciences

Mailing Address:
Acad. Emil Djakov Institute of Electronics,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse
1784 Sofia, Bulgaria

E-mail: nick_ivanov_sl@abv.bg

Dimitar Dechev, Djakov Institute of Electronics, Bulgarian Academy of Sciences

Mailing Address:
Acad. Emil Djakov Institute of Electronics,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse
1784 Sofia, Bulgaria

E-mail: dadechev@abv.bg

Stefan Valkov, Institute of Electronics, Bulgarian Academy of Sciences and Department of Mathematics, Informatics and Natural Sciences, Technical University of Gabrovo

Mailing Address:
Acad. Emil Djakov Institute of Electronics,
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse
1784 Sofia, Bulgaria

and

Department of Mathematics, Informatics
and Natural Sciences,
Technical University of Gabrovo
4 H. Dimitar St
5300 Gabrovo, Bulgaria

E-mail: stsvalkov@gmail.com

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Published

30-09-2022

How to Cite

[1]
M. Ormanova, G. Kotlarski, R. Bezdushnyi, N. Ivanov, D. Dechev, and S. Valkov, “Structure of Ti-Ta Alloys Fabricated by Electron-beam Surface Alloying”, C. R. Acad. Bulg. Sci., vol. 75, no. 9, pp. 1279–1286, Sep. 2022.

Issue

Section

Physics