Optical Emission Spectroscopy during Plasmatron Testing of ZrB₂-SiC Ultrahigh-temperature Ceramic Composites
Optical emission spectroscopy is used to investigate the oxidation of a hot-pressed ZrB2-SiC ultrahightemperature ceramic composite tested in the 1.2 MW Plasmatron facility at the von Kármán Institute for Fluid Dynamics. Time-resolved spectra enable the in situ detection and temporal characterization of electronically excited B, BO, andBO2 species concentrations directly adjacent to the oxidizing sample surface. The evolution of these boron species correlates well with the transient formation of a complex multilayer oxide scale containing a silica-rich glassy outer layer that limits oxide growth.
M. Playez et al., "Optical Emission Spectroscopy during Plasmatron Testing of ZrB₂-SiC Ultrahigh-temperature Ceramic Composites," Journal of Thermophysics and Heat Transfer, American Institute of Aeronautics and Astronautics (AIAA), Apr 2009.
The definitive version is available at http://dx.doi.org/10.2514/1.39974
Materials Science and Engineering
United States. Air Force. Office of Scientific Research
European Office of Aerospace Research and Development
National Science Foundation (U.S.)
Article - Journal
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