I am looking into the feasibility of using heat-absorbing materials to cool the gasses leaving an engine of a stealthy aircraft as part of a design project.
The heat sink would need to have high thermal conductivity and a large specific heat capacity. This would allow a quick transfer of heat energy from the exhaust gases to the conducting material.
Does anybody know which materials would be good to use or where to find them on the internet?
Because its an aircraft, low density materals are also favorable.
Thanks in advanve for any help, Adam