High resolution transmission electron microscope observation of stacking faults of molybdenum disulphide in relation to lubrication
High resolution transmission electron microscope observation of stacking faults of molybdenum disulphide in relation to lubrication
复制标题
高分辨率透射电子显微镜观察二硫化钼堆垛层错与润滑的关系
DOI：
10.1016/0043-1648(91)90228-m
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发表时间：
1991
期刊：
影响因子：
5
通讯作者：
S. Enomoto
中科院分区：
文献类型：
--
作者：
N. Takahashi;M. Shiojiri;S. Enomoto
用透射电子显微镜（TEM）观察了二硫化钼的层状结构。在该晶体的超显微切片S-Mo-S层晶格图像中观察到的额外半平面表明，由于肖克利部分位错，出现了层错。相应的电子衍射图显示出与滑动方向相反的层法向轻微倾斜，导致mos2的晶间摩擦系数较低，约为0.035。在确定晶体取向的情况下，对上述部分进行高分辨率透射电镜观察，发现钼和硫原子的三角棱镜构型呈锯齿状结构，并借助计算机模拟投影图像发现了一种新的层错，从而在原子水平上提出了由肖克利部分引起的层错形成机制。
An image profile of the layer structure of MoS2was examined by transmission electron microscopy (TEM). An extra half-plane observed in the S-Mo-S layer lattice image from an ultramicrotomed section of this crystal suggested the appearance of a stacking fault due to a Shockley partial dislocation. The corresponding electron diffraction pattern showed a slight tilt of the normal to the layers against the direction of sliding, resulting in a low coefficient of the intergranular friction of MoS2of about 0.035. A high resolution TEM observation of the above section with a well-determined crystallographic orientation revealed a zigzag structure of the trigonal prism configuration of molybdenum and sulphur atoms, and a new kind of stacking fault has been found with the aid of a computer simulation of projected images, leading to a proposal for the mechanism of the formation of stacking faults due to Shockley partials on an atomic level.