Thermal barrier KE=-my2 2 Material Energy to Melting Vaporize Temperature BTU/b R Tungsten 1870 6500 Titanium 3865 3700 Beryllium oxide13, 400 2900 Graphite 28,700 6800Thermal Barrier 2 2 1 2 2 c c V m Q KE mV Q = = = Material Energy to Vaporize BTU/lb Melting Temperature ºR Tungsten 1870 6500 Titanium 3865 3700 Beryllium oxi d e 13,400 2900 Graphite 28,700 6800