Parameter Optimization of Powder Metallurgy Material Impregnated with Diamond Nanoparticle Suspension

An iron-matrix powder metallurgy composite with diamond nanoparticle suspension was synthesized to improve the tribological performance of hydraulic components. Based on the theory of suspension flow, filtration and material properties, a mathematical model for predicting the seepage mechanism was established, which was validated by experiments. Furthermore, effects of inlet concentration of diamond nanoparticles and porosity on the seepage characteristics were investigated and results demonstrated that these two parameters have an important effect on the seepage time and total weight gain of diamond nanoparticles. The optimum region of inlet concentration and initial porosity was obtained under different inlet pressure, which is important to select parameters in the design of the composites.