Growth and removing of tungsten whiskers under controlled conditions

Abstract

The growth kinetic and size decreasing process of tungsten rod‐like crystals by heating in the iodine vapour are studied. Effects of tungsten filament temperature (2400 – 3500 K), iodine concentration (to 6 mg/cm3) and water contents (0.01 – 0.05 mg/cm3) are shown. Maximal growth rate of tungsten whiskers to 30 μm/min. Stopping of the growth and following removing by iodine reactions take place after heating to 3500 K.