About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
High Temperature Oxidation of Metals and Ceramics
|
Presentation Title |
Investigation of High Emittance, Oxidation Resistant Multi-Layer Coatings for Carbon/Carbon Composites for Hypersonic Application |
Author(s) |
Abdullah Al Saad, Carlos Martinez, Rodney W. Trice |
On-Site Speaker (Planned) |
Abdullah Al Saad |
Abstract Scope |
During a high-speed flight, the leading edges of hypersonic vehicles can experience enormous heat fluxes, with surface temperatures greater than 1600℃ expected. While carbon/carbon (C/C) is a candidate material for leading edges and other hot structures, it is prone to oxidation and increasing ablation damage above 500℃. Oxidation-resistant coatings can protect the C/C, while emittance can be engineered to lower the leading-edge surface temperature via radiative cooling. In this study, a novel multi-layer coating based on individual layers of borides, carbides, zirconium oxides, and rare-earth stabilized oxides with emissivity modifiers is being applied to a C/C surface via pack cementation and plasma spray. Ablation testing is being performed to evaluate the effectiveness of the multi-layer coatings in simulated high-heat flux environments. The results from these experiments will help design and optimize multi-layer high emissivity and oxidation-resistant coating systems for C/C materials. |