Title

Optical Emission Spectroscopy during Plasmatron Testing of ZrB₂-SiC Ultrahigh-temperature Ceramic Composites

Abstract

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.

Department(s)

Materials Science and Engineering

Sponsor(s)

United States. Air Force. Office of Scientific Research
European Office of Aerospace Research and Development
National Science Foundation (U.S.)

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2009 American Institute of Aeronautics and Astronautics (AIAA), All rights reserved.


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