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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:35 |
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Conference: Bucharest University Faculty of Physics 2015 Meeting
Section: Solid State Physics and Materials Science
Title:
Mossbauer spectroscopy and XPS study of W0.2Mg0.8 alloys deposited on Eurofer substrates
Authors:
S.G. GRECULEASA (1,3), P. PALADE (1), G. SCHINTEIE (1), A. KUNCSER (1,3), A. LUNGU (1), C. POROSNICU (2), I. JEPU (2), C.P. LUNGU (2), G. FILOTI(1), V. KUNCSER (1)
Affiliation:
1) National Institute for Materials Physics, P.O.Box MG-7, 77125, Bucharest-Magurele, Romania
2) National Institute for Laser, Plasma and Radiation Physics, 77125, Bucharest-Magurele, Romania
3) Bucharest University, Faculty of Physics, 077125, Bucharest-Magurele, Romania
E-mail
simona.greculeasa@infim.ro
Keywords:
Abstract:
W-based alloys may represent an alternative for pure W as materials for plasma facing components in future nuclear fusion applications, due to improved ductility and reduced irradiation embrittlement. Due to plasma induced re-deposition processes, W based thin films are also of peculiar interest. W0.2Mg0.8 films (50 nm thick) have been deposited by thermionic vacuum arc (TVA) method on Eurofer steels substrates. By means of Mossbauer spectroscopy and X-ray photoelectron spectroscopy (XPS), we have studied the iron local surrounding in the Eurofer substrate, the phase composition and the oxidation degree in the alloy films. The W content is prevailing over Mg at or close to the surface. The preparation conditions in TVA (different Oxygen content) influence the oxidation of the samples. Elements of the Eurofer alloy and of the film, Cr, W, as well as Mg, are dissolved in the Fe bcc phase.
Acknowledgement:
This work was supported by the Romanian National Program and the European Community under the EUROFUSION contract 1 EU-1 WPPFC-RO, as well as by the UEFISCDI project PN-II-ID-PCE-2011-3-0522. S.G. Greculeasa was also supported by the strategic grant POSDRU/159/1.5/S/137750.
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