A Low Cost Synthesis Technique for Tungsten Whiskers of <100> Orientation

Large-scale synthesis of tungsten single-crystal microtubes via vapor-deposition process

“…W whiskers with a single-crystalline structure are well known for their outstanding mechanical properties (tensile strength: $28 GPa and Young's modulus: $ 410 GPa) [29][30][31] and field emission properties [29,32]. To date, a number of techniques for fabricating W whiskers have been developed [32][33][34][35][36][37][38][39][40], among which the hightemperature chemical vapor-deposition (HT-CVD) method [34][35][36] has been demonstrated as a promising approach with great potential for the large-scale synthesis of W whiskers. In HT-CVD method, a high temperature (typically above 1500 1C) is required in order to generate gaseous tungsten oxides (WO x ), which possess a relatively low vapor pressure.…”