What Are The Advantages Of H-BN With Excellent Lubricity in Application?

Generally speaking, lubricating oil additives are by changing the form of the lubricating oil film adsorbed on the surface of the moving body, to prevent the contact of the rough surface micro-convex body when the surface of the friction pair moves together, so as to improve the lubrication and wear resistance of the surface. At present, the preparation of lubricant additives by nano lubricating materials is the main means to improve the performance of antiwear lubrication.

These nanomaterials mainly play two roles in lubricating oil, one is "micro ball bearing effect"; The second is the self-healing effect. They will enter the surface of the friction pair when working in motion, and change the friction mode between the friction pair -- from pure sliding friction to sliding and rolling friction. Because the friction coefficient of rolling friction is one order of magnitude smaller than that of sliding friction, friction and wear can be reduced.

Compared with more reported metal nanoparticles (such as copper and iron), H-BN has more application advantages in lubricants. This is because although the soft nano additives have excellent performance, they consume quickly in the use of lubricating oil, and the barrier effect between friction pairs will gradually decline, thus reducing the service life of lubricating oil; On the other hand, most of these metal nanoparticles are polyhedral in shape, and the atoms on the surface are distributed in a ladder shape, with high activity. The improvement of lubricating oil is mainly accomplished through the self-healing effect on the surface of the friction pair, and the "miniature ball bearing" effect is not obvious.

As a kind of excellent solid lubricant, the layered H-BN has the advantages of high bearing capacity, good stability at high temperature and stable physical properties compared with liquid or semi-solid lubricant. It can be dispersed in heat resistant lubricating grease, water or solvent, sprayed on the friction surface, to be solvent volatilized and formed dry film; It can also be filled in the surface of resin, ceramic, metal and other materials as heat-resistant and high-temperature self-lubricating materials.