Research Of Tribological Properties And Mechanism On Novel Nano Self-repairing Additive

Friction and wear is the inevitable phenomenon in machine operation, Through separating the surface to avoid direct contact, the lubrication is the most effective . The advent of nanotechnology and nanometer materials provides a new way for lubricating additive application. The self-repairing function is different from traditional mechanism,it can formed thin layer on friction surface to resist or compensate the wear in online. Many countries have launched great work in experimental analysis and practical exploration, it has been achieved remarkable achievement; the self-repairing has great significance to increase the service life of equipment,reduce the cost in resources.With the theory and structure of the additive,this paper presents a new type of additives -biotitic, it is a kind of ores material. In order to study the properties of the material in self-repairing, the friction and wear experiment of additives are performance on the wear machine, The main contents are as follows:1. With nanometer material preparation technology, biotitic and serpentine are preparation in the ball milling which using oleic acid,KH-55 and ultrasonic for physical and chemical modification; the size of particle are detected by the micro lens.2. For the friction of sliding bearing ,the specimen, axle sleeve and the lubrication cycle are designed, at the same time ,the test of temperature is improved.3. The experiment is implemented on wear machine in 500SN oil; and the 38 hours experiment of wear and repairing is carried out with additives; furthermore the specimens at each time are checked through SEM, EDAX, the results indicate that the biotitic has obviously the properties of self-repairing,there is a certain gap compared with the serpentine.4. According to the result of morphology and energy spectrum, the process of self-repairing are researched; and the comparative analysis are made in the friction coefficient,the friction torque, the friction temperature and abrasion wear properties; connected the experiment and the analysis of friction properties,the self-repairing mechanism is researched and the additives has the remediation of physical and chemistry for the wear surface with enough activation energy.