Biotite/Mo Composite Additive Preparation And Lubrication Mechanism Research

Resources are wasted and some mechanical components lost efficacy because of fricition and wear. As a traditional lubricating oil, although it can present lubrication antifriction, shock absorption and noise reduction,it cannot be achieved relative motion vice friction surface ecological self-repairing. Recently, with the development of nanotechnology,nanomaterials have shown excellent self-repairing properties ,which provides a different way of thinking and philosophy to develop the new lubricating oil additive. How to repair the wear surface in the process of mutual movement. In order to prolong the service life of equipment and maintenance cycle is the hotspot research. The thesis is based on the research and development of environmentally friendly, low price, good resistance to extreme pressure of the layered structure of silicate minerals biotite and molybdenum powder as raw materials.In the laboratory experience based on the improved formula and preparation process. The properties of friction and wear of biotite/Mo composite powders as lubricating oil additives are studied , and discuss the anti-wear &self-repair mechanism of anti-friction.First of all, both the development course of nano materials and nano solid lubricating additive preparation methods.The layered silicate mineral, soft metal, metal and non-metallic compounds as lubricating oil additives research status have been analyzed. The different modifier modification mechanism and structure style have been summarized. The stability of the nanoparticles dispersed in a liquid medium research present situation have been reviewed.Combined with different additives in anti-friction and anti-wear and lubrication mechanism play a different role, putting forward biotite/Mo composite powder as additive in lubricating oil.Second, simply analyzing the biotite and Mo powder physical and chemical properties,and solid phase method is used to obtain biotite/Mo composite powders. The different modifiers is used for studying of composite powders in the dispersion of base oil. Base oil settling experiments, activation coefficient as the main evaluation index to optimize its dispersibility. With the assistance of scanning electron microscopy (SEM), the oleic acid modified and unmodified powder particle size detection, oleic acid modified mechanism are summarized.Third, wear specimen and oil spray device have been designed on the SFT-2M friction and wear experiments, and constructed a system of circulating friction. Setting up evaluation biotite/Mo lubricating additives friction and wear experiment platform,and designing the experimental scheme.Finally, biotite/Mo tribological properties is tested on the friction and wear experiments.The effect of concentration, load, friction pair material on biotite/Mo lubricating additive self-healing performance. The influence of contrast analysis of the base oil and biotite, Mo powder, biotite/Mo of anti-friction and anti-wear lubricant additive effect, Combination with surface analysis techniques (SEM, EDS, XPS) on the wear surface microstructure, the composition of elements and compounds are studied. The anti-wear &self-repair mechanism anti-friction of biotite/Mo lubricating additive is discussed preliminarily.