Molybdenum disulfide (MoS2) is one of the most widely used solid lubricants. Much research has been conducted on its friction properties and the reasons for its good lubricating behavior. Johnson, Winer, and Farr have written excellent reviews on the history, uses, and fundamental knowledge of MoS2 as a lubricant. Many studies have been conducted on the lubrication mechanisms of M0S2 films. Most of these studies have been on a molecular level; that is, they have related the good lubricating properties of M0S2 to its hexagonal crystal structure and covalent nature or to its highly polarized surface that adheres well to metals. Many studies have also been conducted on the failure mechanisms of MoS2 films. Failure has been related to the chemical degradation of M0S2, with the most predominant chemical reaction in air being oxidation. It has also been proposed that water vapor accelerates the oxidation process. Very few studies have been conducted on how M0S2 films lubricate and fail from a microscopic point of view. In one of a few, Salomon, De Gee, and Zaat (refs. 8 and 9) have observed and recorded morphological changes of MoS2 films photographically by stroboscopic illumination. They have observed that M0S2 compacts and sinters on the wear track form a highly reflective film and that oxidation of the MoS2 lead to embrittlement, blistering, and film scaling. If you are looking for high quality, high purity, and cost-effective Molybdenum disulfide or the latest price, please email contact mis-asia.
