Temperature jump phenomenon during plasmatron testing of ZrB 2-SiC ultrahigh-temperature ceramics

Jochen Marschall, Dušan A. Pejaković, William G. Fahrenholtz, Greg E. Hilmas, Francesco Panerai, Olivier Chazot

Research output: Contribution to journalArticlepeer-review

Abstract

The performance of ZrB2-SiC ultrahigh-temperature ceramics in subsonic high-enthalpy dissociated airflows was investigated in the 1.2MWPlasmatron 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.

Original languageEnglish (US)
Pages (from-to)559-572
Number of pages14
JournalJournal of thermophysics and heat transfer
Volume26
Issue number4
DOIs
StatePublished - 2012
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Aerospace Engineering
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Space and Planetary Science

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