Real-time quantitative imaging of RTV silicone pyrolysis

Quantitative microstructural analysis of Room Temperature Vulcanized (RTV) silicone pyrolysis at high temperatures is presented. RTV is used as a bonding agent in multiple industries, particularly filling gaps in ablative tiles for hypersonic (re-)entry vehicles and fire prevention. Decomposition of...

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Bibliographic Details
Published inarXiv.org
Main Authors Foster, Collin, Oruganti, Sreevishnu, Panerai, Francesco
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 31.01.2023
Subjects
Ablation
Bonding agents
Bulk density
Densification
Fire prevention
Heating rate
High temperature
Microstructural analysis
Microstructure
Pyrolysis
Quantitative analysis
Real time
Room temperature
Thermal response
X ray microtomography
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Summary:Quantitative microstructural analysis of Room Temperature Vulcanized (RTV) silicone pyrolysis at high temperatures is presented. RTV is used as a bonding agent in multiple industries, particularly filling gaps in ablative tiles for hypersonic (re-)entry vehicles and fire prevention. Decomposition of RTV is resolved in real time using in situ high-temperature X-ray computed micro-tomography. Full tomographies are acquired every 90~seconds for four different linear heating rates ranging from 7 to 54 C/min. The microstructure is resolved below 5 micro-meters/pixel, allowing for a full quantitative analysis of the micro-structural evolution and porous network development. Results are highly heating rate dependent, and are evaluated for bulk sample volume change, porosity, pore network size, and observed densification from X-ray attenuation. The outcome of this work is critical to develop multi-physics models for thermal response.
ISSN:2331-8422