Temperature Jump Phenomenon During Plasmatron Testing of ZrB₂-SiC Ultrahigh-temperature Ceramics
The Performance of ZrB2-SiC ultrahigh-temperature ceramics in subsonic high-enthalpy dissociated airflows was investigated in the 1.2 MW plasmatron facility at the Von Karman Institute for Fluid Dynamics. Samples were sequentially exposed to low and high heat flux conditions during a single test run. Under certain high heat flux conditions, a rapid and spontaneous rise in sample surface temperature was observed under constant freestream conditions. The temperature jump seems associated with a transition in surface chemistry that leads to the loss of protective silica glass and substantially increases the chemical component of heat flux delivered to the surface.
J. Marschall et al., "Temperature Jump Phenomenon During Plasmatron Testing of ZrB₂-SiC Ultrahigh-temperature Ceramics," Journal of Thermophysics and Heat Transfer, American Institute of Aeronautics and Astronautics (AIAA), Oct 2012.
The definitive version is available at https://doi.org/10.2514/1.60257
Materials Science and Engineering
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© 2012 American Institute of Aeronautics and Astronautics (AIAA), All rights reserved.
01 Oct 2012