Microstructure and preparation of nano S-W-S new solid lubrication system

来源期刊：中国有色金属学报(英文版)2000年第6期

论文作者：韦钦 罗文东 孙克辉 王皋

文章页码：753 - 756

Key words：solid lubrication system; nanometer cluster; quantum size effect

Abstract: The method for preparing a new solid lubrication system of nano S-W-S was presented. The microstructur of the S-W-S nano cluster was investigated using TEM and XRD. The system is a mixture clusters of both monocrystal and polycrystal of layered hexagonal structure with one tungsten atom linking with two sulphur atoms, and the week Van der Waals’force bonding together the different layers. The changes of electronic structure were studied with XPS. The hybridization of different electronic shell orbitals of the sulphur atom in the nano cluster is regarded as the quantum size effect. The clusters are found to be of a closed spherical structure without any dangling bond.