Abstract Many are the materials for hot structures, but the most promising one are the carbon based composites nowadays. This is because they have good characteristics with a high stability at high temperatures, preserving their mechanical properties. Unfortunately, carbon reacts rapidly with oxygen and the composites are subjected to oxidation degradation. From this point of view C\C has to be modified in order to improve its thermal and oxidative resistance. The most common solutions are the use of silicon carbide into the carbon composites matrix (SiC composites) to make the thermal properties increase and the use of coating on the surface in order to protect the composite from the space plasma effects. Here is presented an experimental study on coating effects on these composites. Thermal properties of coated and non coated materials have been studied and the thermal impact on the matrix and surface degradation is analyzed by a SEM analysis.

    Highlights CTE tests have been performed on coated and non coated samples. CTE results have been compared in order to evaluate the thermal properties variations. Matrix morphology (infiltration level) of composites strongly influences the thermal behavior, so, different manufacturer samples lead to different CTE values. Coating, chosen for its compatibility with this kind of materials, modifies the thermal behavior making the material to have a better dimensional stability and so lower CTE values. Morphological analysis has been performed in order to study the degradation of the material.


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    Title :

    Coating effects on thermal properties of carbon carbon and carbon silicon carbide composites for space thermal protection systems


    Contributors:
    Albano, M. (author) / Morles, R.B. (author) / Cioeta, F. (author) / Marchetti, M. (author)

    Published in:

    Acta Astronautica ; 99 ; 276-282


    Publication date :

    2014-02-10


    Size :

    7 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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