A heat radiating component includes a base including a first metal, a first plating layer formed on the base and including a second metal and carbon material structures dispersed in the second metal, and a second plating layer formed on the first plating layer. A multilayer structure is deposited, comprising a gate oxide layer, a first polysilicon layer, a dielectric layer, and a second polysilicon layer. The presence of a through-hole extending through a wall of the hollow airfoil is identified, and the through-hole is closed by welding using a second nickel-base superalloy, without using any freestanding closure element.