Tungsten Whiskers by Vapor-phase Growth.
Electrodep & Srfc Treatment Elsevier Sequoia S a Lausanne Switz 2:249-62
Laboratory studies were made to produce whiskers of tungsten over a wide range of operating temperatures. Hydrogen reduction of tungsten hexachloride in a vacuum furnace at temperatures from 2,700 deg to 3,300 deg c yielded a small quantity of tungsten whiskers when a low degree of supersaturation was maintained. Direct measurements of 3 million to 4 million psi were obtained for the ultimate tensile strengths of individual whiskers averaging 3 to 4 um in diameter with average aspect ratios of 1,000. This compares with strengths of 300,000 to 400,000 psi for 13-um-diam commercial filaments.
Electrodep. & Srfc. Treatment, Elsevier Sequoia S.a., Lausanne, Switz, V. 2, 1973/74, Pp 249-62