Conferences

Anodic Oxidation of SiC–TiB2–B4C Composites in 3% NaCl Solution

 
V.Lavrenko,
 
V.Lavrenko,
   
L.Kuznetsova
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2010, #11/12
http://www.materials.kiev.ua/article/1700

Abstract

Polarization curves and Auger spectroscopy are used to study the kinetics, formation mechanism, and layer-by-layer phase composition of oxide films resulting from the anodic oxidation of SiC–TiB2–B4C ceramics containing 10 wt.% and 40 wt.% TiB2 in 3% NaCl solution. It is shown that two-layer oxide films forms in the former case (β-Ті2О3 is the lower layer and TiO2 the upper one) and three-layer film forms in the latter case (nonstoichiometric β-ТіО is the upper and lower layers and β-Ті2О3 the intermediate one). Both ceramic samples, especially those with 10 wt.% TiB2, have high corrosion resistance.


ANODIC OXIDATION, AUGER SPECTROSCOPY, BORON CARBIDE, CERAMICS, POLARIZATION CURVES, SILICON CARBIDE, TITANIUM BORIDE, TITANIUM OXIDES