Abstract: Fabrication of refractory metal nanoparticles and carbon nanotubes is disclosed. As an example, a method may include providing a solvent and providing a surfactant having a first surfactant configured to stabilize low oxidation states of a refractory metal and a second surfactant configured to protect refractory metal nanoparticles. The method may further include providing a refractory metal precursor and providing a reactant for reacting with the refractory metal precursor and forming refractory metal nanoparticles. The refractory metal may include rhenium, tungsten, tantalum, or hafnium. The refractory metal nanoparticles may include rhenium, tungsten, tantalum, or hafnium nanoparticles. A carbon nanotube product may include refractory metal nanoparticles and carbon nanotubes, where the refractory metal nanoparticles may include rhenium, tungsten, tantalum, or hafnium nanoparticles.

Abstract: A coating slurry comprised of 42 percent silicon and 10 percent chromium metal powders; 45 percent lacquer base including toluene, xylene, and a polymeric binder; and 3 percent antisettling agent. After the slurry has been applied and then subjected to a high temperature vacuum processing, a ceramic coating is obtained which provides 3000.degree. F. high temperature oxidation protection for a refractory tantalum alloy substrate.