期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 89, 期 2-3, 页码 438-444出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2004.10.001
关键词
intermetallic compounds; coatings; electrochemical techniques; electrochemical properties
The electroreduction mechanism of Ti(III) ions on iron in the LiF-NaF-KF eutectic melt was studied at 700 and 900degreesC using cyclic voltammetry. At both temperatures, the reduction occurs through a three-electron transfer, but at 700degreesC only pure titanium is deposited, whereas the successive formation of Fe2Ti and FeTi intermetallic compounds precedes pure titanium deposition at 900degreesC. At 900degreesC under open-circuit conditions, the different phases appear successively at the electrode/electrolyte interface by interphase movements due to intermetallic diffusion. At the same temperature but under anodic polarization, each phase appears at the electrode surface according to a layer-by-layer dissolution. (C) 2004 Elsevier B.V. All rights reserved.
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