New Structural State of Tungsten in Obtaining Porous Tungsten Coatings.

For the first time, porous tungsten coatings were obtained by vacuum annealing of coatings consisting of both lead solution in β-W and a mixture of Pb solution in β-W and pure lead. Electron microscopic studies of the obtained coatings before and after vacuum annealing at 800 °C for 1 h and 6 h were carried out. The formation of a new phase of tungsten with an octa-lattice and parameter a = 0.4878 ± 0.0005 nm was recorded. [ABSTRACT FROM AUTHOR]