Synthesis of molybdenum borides and molybdenum silicides in molten salts and their oxidation behavior in an air-water mixture

S.A. Kuznetsov, S.V. Kuznetsova, E.V. Rebrov, M.J.M. Mies, M.H.J.M. Croon, de, J.C. Schouten

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25 Citations (Scopus)

Abstract

The formation of various coatings in molybdenum-boron and molybdenum-silicon systems was investigated. Boronizing and siliciding treatments were conducted in molten salts under inert gas atm. in the 850-1050 DegC temp. range for 7 h. The presence of boride (e.g. Mo2B, MoB, Mo2B5) and silicide (MoSi2, Mo5Si3) phases, formed on the surface of Mo plates, was confirmed by X-ray diffraction anal. The distribution of elements was detd. by means of wavelength dispersive spectroscopy (WDS) spectra of the surface and line-scan analyses from surface to interior. Depending on the process type (diffusional or electrochem.) and temp., the thickness of the protective layers formed on the substrate ranged from 6 to 40 mm. The oxidn. resistance of obtained phases was investigated in an air-water mixt. in the temp. range of 500-700 DegC for a period up to 400 h. An improved oxidn. behavior of coated plates in comparison with that of pure molybdenum was obsd. [on SciFinder (R)]
Original languageEnglish
Pages (from-to)182-188
Number of pages7
JournalSurface and Coatings Technology
Volume195
Issue number2-3
DOIs
Publication statusPublished - 2005

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