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Binner, Jon

Venkatachalam, Vinothini

English

Engineering Conferences International

THERMAL ABLATION BEHAVIOUR OF ULTRA-HIGH TEMPERATURE CERAMIC MATRIX COMPOSITES MADE BY RF ENHANCED CHEMICAL VAPOUR INFILTRATION  Jon Binner, University of Birmingham, UK j.binner@bham.ac.uk  Vinothini Venkatachalam, University of Birmingham, UK   Key Words: UHTCMCs, RF-CVI, ZrB2 & HFB2 and their mixtures, thermo-ablation resistance  Carbon fibre reinforced Ultra High Temperature Ceramic (UHTC) Matrix Composites (UHTCMCs) have proven to be excellent materials that can survive nearly 3000°C in highly oxidizing environments along with a high specific strength. Consequently, they have excellent potential for use in aerospace applications such as rocket nozzle throats and thermal protection systems (TPS). Due to the presence of the carbon fibres, UHTCMCs offer high strength and modulus combined with excellent thermal shock behaviour whilst the presence of the ultra-high temperature ceramic phase protects the carbon fibers at the application temperatures. High temperature oxidation, thermal ablation behaviour and mechanical properties of the UHTCMC’s relies heavily on the bonding between the carbon fibre and the matrix used, including the oxides formed during use, to avoid failure.   In the present work the thermal ablation behaviour, evaluated using thermal ablative tests using a purpose-built oxyacetylene (OAT) torch as well as arc-jet and rocket testing, of PAN-derived continuous carbon fibre preforms impregnated with ZrB2 and HfB2 powder and the porosity filled with carbon infiltrated using RF CVI will be presented.   

Thermal ablation behaviour of ultra-high temperature ceramic matrix composites made by RF enhanced chemical vapour infiltration

https://dc.engconfintl.org/cgi/viewcontent.cgi?filename=0&article=1023&context=uhtc_v&type=additional

Thermal ablation behaviour of ultra-high temperature ceramic matrix composites made by RF enhanced chemical vapour infiltration

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Engineering Conferences International