研究了钨晶须的制备工艺,并分析了其生长机理.采用X射线衍射、扫描电镜、能谱分析、透射电镜对制备的钨晶须进行物相、形貌、成分、微观结构的分析和表征.研究表明：钨晶须长度大致在1～10μm,直径在1μm以下,部分达到纳米级;晶须为单晶bcc结构,生长方向为〈110〉;钨晶须形成过程为钨粉及其氧化产物与水汽反应生成气相水合物WO2（OH）2,遇氢气还原后形核并沉积,进而定向生长为晶须结构,钨晶须的生成遵循VS机理.
Tungsten whiskers were prepared and the growth mechanism was studied in the paper. X-ray diffrac- tion,Scanning electron microscope ,Energy dispersive spectrometer and Transmission electron microscope were used to analyze phase, appearance, element contents and microstructure, respectively. The results show that the produced tungsten whiskers have a length of 1 - 10 p.m,a diameter of less than 1 p~m. The whiskers grow along 〈 110 〉 direction with complete bcc crystal structure. The formation process oftungsten whiskers may be de- scribed as follows：first, tungsten powder and oxidation products turn into gas hydrate WO2 （OH）2 under the effect of water vapor; second, WO2 （OH） 2 is reduced to tungsten by H2 ; then, the reduced tungsten nucleates and deposits to be the structure of whisker, so the tungsten whisker growth follows VS mechanism.
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