Experimental and numerical investigation of effect of particle size on particle distribution in particulate metal matrix composites

摘要

The effect of particle size on particle distribution during the casting of particulate metal matrix composites (PMMC) is experimentally and numerically investigated. Pb20% Sn alloy and Zr2O3 particles are employed as matrix and reinforcing materials respectively. The casting is performed with an inert gas pressure. The final product is sectioned at several locations and particle fraction is determined using image processing software. Particle fraction is numerically determined by following trajectories of selected particles. It is found that particle fraction decreases along the mold and segregation is reduced with larger particles. The numerical results agree reasonable with experimental data.