Jean-François Justin , Aurélie Julian-Jankowiak  , Vincent Guérineau  , Virginie Mathivet  , Antoine Debarre

DOI Number XXX-YYY-ZZZ

Conference Number HiSST 2018_28601101

Ultra-High Temperature Ceramics (UHTC) are good candidates to fulfil the harsh requirements of hypersonic applications. For more than a decade, ONERA has been actively involved in several programs to develop such materials for different applications (hypersonic flights, propulsion systems …). In our laboratories, monolithic and composite materials have been investigated as well as several processing methods. In this paper, we present for example the ZrB2-SiC and HfB2-SiC compositions with TaSi2 or Y2O3 additions which have been especially studied in the European Projects ATLLAS and ATLLAS 2. Assessments of several prototypes in realistic environment are also described. Furthermore, based on these material developments, a specific study on the oxidation behaviour of such monoliths from 1200°C to 2400°C with a dedicated test bench using a 2 kW CO2 laser has been carried out (oxidation under air and water vapour atmospheres). Recently, some work on the manufacturing of Ultra-High Temperature Ceramic Matrix Composites (UHTCMC) has been initiated using slurry infiltration and pyrolysis. The behaviour and properties of these materials are encouraging.

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In Categories: Advanced Airframe Materials, Aircraft Design, HiSST 2018, Materials and Structures, Structural Design & Materials, Supersonic and Hypersonic Aircraft Design, Thermal and Energy Management Systems
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