Tribological effects of particle concentration of an iron particle suspension

The general friction and wear performance of an iron particulate suspension under boundary lubrication conditions are presented. The suspension is a m ixture of 1-5 micrometer diameter carbonyl iron particles with commercial h ydraulic oil, which resembles typical composition of magneto-rheological fl uids. The investigation involves changing the particle concentration of the suspension. The optimal concentration of the suspension from a tribologica l view point can be observed from the experimental results,which provides a reference to the design of the particle loading of magneto-rheological flu ids.