Evolution of Structure during the Oxidation of Zirconium Diboride-Silicon Carbide in Air Up to 1500°C
The structures that developed as dense ZrB2-SiC ceramics were heated to 1500°C in air were characterized using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction. The oxidation behavior was also studied using thermal gravimetric analysis (TGA). Below 1200 °C, a protective B2O3-rich scale was observed on the surface. At 1200 °C and above, the B2O3 evaporated and the SiO2-rich scale that formed was stable up to at least 1500 °C. Beneath the surface, layers that were rich in zirconium oxide, and from which the silicon carbide had been partially depleted, were observed. The observations were consistent with the oxidation sequence recorded by thermal gravimetric analysis.
A. Rezaie et al., "Evolution of Structure during the Oxidation of Zirconium Diboride-Silicon Carbide in Air Up to 1500°C," Journal of European Ceramic Society, Elsevier Inc., Jan 2008.
The definitive version is available at http://dx.doi.org/10.1016/j.jeurceramsoc.2006.10.012
Materials Science and Engineering
Keywords and Phrases
Ceramic Matrix Composite; Composite Material; Dispersive Spectrometry; Experimental Study; High Temperature; Microstructure; Non Oxide Ceramics; Oxidation; Scanning Electron Microscopy; Silicon Carbide; Surface Structure; Technical Ceramics; Temperature Effect; Thermogravimetry; Ultra High Temperature Ceramic Materials; X Ray Diffraction; X Ray Spectrometry; Zirconium Boride
Article - Journal
© 2008 Elsevier Inc., All rights reserved.