Author : Sagar Shinde and R. R .Navthar

Tribology is the science and technology of interacting surfaces in relative motion of related subjects and practices. Sliding and rolling surfaces represent the key to much of our technological society. Understanding of tribological principles is essentials for successful design of machine elements. When two normally flat surfaces are placed in a contact, surface roughness causes contact to occur at a discrete contact spots and an interfacial adhesion occurs. Materials coatings and surface treatments are used to control friction and wear. One of the most effective means of controlling friction and wear is by proper lubrication, which provides smooth running and satisfactory life of machine elements. Lubricants can be liquid, solid, gas. Present scenario works on solid lubricant as per demands from the industries. Some applications has too complicate design and some application has to be installed in complicate placeless where periodically oiling requires for its better performance. In such cases lubrication is also serious problem because of machine location and complicate design. Solid lubrication is the solution for such application. So now a day the more emphasize has been taken on investigation of solid lubricants. Meanwhile the number of works has been done on metal matrix composites. The aim of this work is to find and develop the better combination of metal matrix solid lubricant for different application. Graphite flakes, and sub- micropartical ofMoS2 and Brass (20%Zinc), were investigated in dry sliding conditions. Friction and wear experiments were conducted on pin-on-disc apparatus, using composite pins against polished EN8 steel counterparts, performed within the room temperature. With the addition of sub-micropartical, the frictional coefficient and wear rate of the composites were further reduced especially at high loading condition. In this investigation, with insertion of Mos2 in Brass,improves friction and wear properties but also enhance the mechanical characteristic of Brass.

Keywords: Brass, Bass composites, Solid lubrication, wear, coefficient of friction; friction, fictional force

Article published in International Journal of Current Engineering and Technology, Vol.5, No.2 (April-2015)