Abstract

 By means of effective lubrication, mechanical design seeks to minimize friction in devices such as engines, skisandcomputer hard disc drives. On the other hand, high friction is essential for the traction and braking of rubber car tyres againsttheroad surface. From the above, it clearly indicates the two main constituents of tribology: friction and wear, whencontrolledandreduced, automatically increase the service life of machine elements. This in turn saves money. The awareness of the subject, theidentification of tribological problems and their solution can give rise to significant saving. For this reason many industriesareplacing emphasis on economic aspects of tribology.Piston compression ring is placed on the top position of the assembly. Itaccounts for 80 % of piston subsystem loss due to mechanical friction developed because of simultaneous sealing and sliding action. Keywords: Nano metal powder, wear, friction, lubricants