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High-Temperature Oxidation of SSIC in Plasma Flows

Laux, Torsten (2007) High-Temperature Oxidation of SSIC in Plasma Flows. First CEAS European Air and Space Conference, 2007-09-10 - 2007-09-13, Berlin.

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Within the scope of this work high-temperature oxidation of SSIC was investigated in plasma wind tunnels at the Institute of Space Systems, University of Stuttgart. The tests were performed in both arc heated nitrogen/oxygen plasma flows and inductively heated oxygen plasma flows. In oxygen plasmas, passive-active transitions were determined for temperatures between 1801°C and 1869°C and for oxygen partial pressures between 812 and 3132 Pa. The tests were performed in supersonic and subsonic flows at velocities ranging from 390 to 6000 m/s. Passive-active transitions in nitrogen/oxygen started at temperatures from 1417°C up to 1839°C and oxygen partial pressures between 4 and 160 Pa. Active-passive transitions were determined for surface temperatures between 1831°C and 2145°C at oxygen partial pressures from 28 up to 2290 Pa. The pressures were estimated using mass spectrometer and Pitot probe measurements. The flow velocity was between 1570 and 6500 m/s. Analytical observations show, that reactions at the interface SiC-C-SiO<sub>2</sub> are responsible for the degradation of the silicon dioxide layer. The temperature jump during transition from passive to active oxidation in oxygen plasmas is attributed to the reaction of gaseous silicon and atomic oxygen, while the recombination of atomic nitrogen is mainly responsible for this phenomenon in nitrogen/oxygen plasma flows.

Item URL in elib:https://elib.dlr.de/52195/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:High-Temperature Oxidation of SSIC in Plasma Flows
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Date:September 2007
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:silicon carbide, oxidation, thermal protection, re-entry
Event Title:First CEAS European Air and Space Conference
Event Location:Berlin
Event Type:international Conference
Event Dates:2007-09-10 - 2007-09-13
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Vorhaben SHEFEX (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Space Structural Components
Deposited By: Laux, Dr.-Ing. Torsten
Deposited On:14 Dec 2007
Last Modified:27 Apr 2009 14:33

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