G. Dugast , A. Settar , K. Chetehouna , N. Gascoin  , M. Bouchez  , J.L. Marceau  , R. Peiffer

DOI Number XXX-YYY-ZZZ

Conference Number HiSST 2018_990964

Silicone-based composites material found a large use in the aerospace industry to protect wall structures from severe heating. To determine experimentally the thermophysical properties (λ, ρ, Cp,) and the kinetic triplet (Ea, A, n) from ambient temperature to 1000°C, dedicated experimental apparatus are used. An experimental procedure has been carried out on a generic silicone-based composite, it consists of a silicone matrix with short carbon fibres and silicon carbide powder. First, thermogravimetric analysis has been conducted on the material at different heating rate and confirming the complex thermal degradation, thus under inert atmosphere, the weight of the material decreases up to 28.8%. From these results, a kinetic mechanism degradation and a methodology for a correct estimation of the triplet kinetic parameters are proposed. Several apparatuses have been used to determine the thermophysical properties such as Calvet calorimeter, Differential Scanning Calorimetry, dilatometer and laser flash analysis, from this result the thermal conductivity is estimated. Once the properties are determined, the measured data has been implemented in a finite element 1D approach, showing the efficiency of the generic silicone-based composite as a thermal barrier.

Download the Full Paper >

In Categories: HiSST 2018, Materials and Structures, Thermal and Energy Management Systems, Thermal Protection Systems, Thermal Protection Systems
Email
Print
LinkedIn
The paper above was part of  proceedings of a CEAS event and as such the author has signed a publication agreement to have their paper published in the repository. In the case this paper is found somewhere else CEAS always links to the other source.  CEAS takes great care in making the correct content available to the reader. If any mistakes are found  in the listings please contact us directly at papers@aerospacerepository.org and we will correct the listing promptly.  CEAS cannot be held liable either for mistakes in editorial or technical aspects, nor for omissions, nor for the correctness of the content. In particular, CEAS does not guarantee completeness or correctness of information contained in external websites which can be accessed via links from CEAS’s websites. Despite accurate research on the content of such linked external websites, CEAS cannot be held liable for their content. Only the content providers of such external sites are liable for their content. Should you notice any mistake in technical or editorial aspects of the CEAS site, please do not hesitate to inform us.