Temperature Jump Phenomenon During Plasmatron Testing of ZrB₂-SiC Ultrahigh-temperature Ceramics

Jochen Marschall; Dušan A. Pejaković; William Fahrenholtz; Greg Hilmas; Francesco Panerai; Olivier Chazot

doi:10.2514/1.60257

Temperature Jump Phenomenon During Plasmatron Testing of ZrB₂-SiC Ultrahigh-temperature Ceramics

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

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	American English
Journal	Journal of Thermophysics and Heat Transfer
DOIs	https://doi.org/10.2514/1.60257
State	Published - Oct 1 2012

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Materials Science and Engineering

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https://doi.org/10.2514/1.60257

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title = "Temperature Jump Phenomenon During Plasmatron Testing of ZrB₂-SiC Ultrahigh-temperature Ceramics",

abstract = " 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.",

author = "Jochen Marschall and Pejakovi{\'c}, \{Du{\v s}an A.\} and William Fahrenholtz and Greg Hilmas and Francesco Panerai and Olivier Chazot",

year = "2012",

month = oct,

day = "1",

doi = "10.2514/1.60257",

language = "American English",

journal = "Journal of Thermophysics and Heat Transfer",

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T1 - Temperature Jump Phenomenon During Plasmatron Testing of ZrB₂-SiC Ultrahigh-temperature Ceramics

AU - Marschall, Jochen

AU - Pejaković, Dušan A.

AU - Fahrenholtz, William

AU - Hilmas, Greg

AU - Panerai, Francesco

AU - Chazot, Olivier

PY - 2012/10/1

Y1 - 2012/10/1

N2 - 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.

AB - 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.

UR - https://scholarsmine.mst.edu/matsci_eng_facwork/121

UR - https://doi.org/10.2514/1.60257

U2 - 10.2514/1.60257

DO - 10.2514/1.60257

M3 - Article

JO - Journal of Thermophysics and Heat Transfer

JF - Journal of Thermophysics and Heat Transfer

ER -

Temperature Jump Phenomenon During Plasmatron Testing of ZrB₂-SiC Ultrahigh-temperature Ceramics

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