Growth of tungsten whiskers oriented in <111> direction

Abstract

The electron micro diffraction technique and pseudopotential ab initio calculations were implemented to study in details the formation and mechanism of growth of the tungsten whiskers during the reduction of nickel tungstate by CO gas. It has been shown that the W whiskers prefer to grow as crystals oriented in the <111> direction, and this process may be considered as the epitaxial growth on the hexagonal planes of Ni 4 W particles.

Synthesis and Characterization of Tungsten Micro-/Nanoparticles Using Tungstate-Based Inorganic-Organic Hybrid Nanobelts as Precursors

“…A number of methods have been developed to synthesize W nanocrystals, including mechanical milling [6], laser irradiation [7], electron beam-induced deposition [8] and solvothermal methods [9]. W nanocrystals with specific shapes, such as nanowires [1,10], whiskers [11], nanorods [12] have also been synthesized used various methods. However, there are some limitations in these methods.…”