Several processing techniques have been proposed for the fabrication of functionally graded materials (FGMs), whose composition and microstructure, i.e., the chemical and physical properties vary in the specific direction. The mechanical property of FGMs is affected by dispersed particle size, volume fraction of the particle, and particle orientation, In order to clarify its property, it is important to disclose the particle motion during the fabrication process. In this study, two-dimensional circular particle motion during fabrication of Functionally Graded Materials is studied using the cold model centrifugal casting. Consideration is given to the timewise variation of the radial circular-disk motion in the axially rotating cold water drum, The velocity measurement is carried out by means of the Particle Tracking Velocimetry (PTV) method and the measured value is compared with that estimated by the theoretical prediction. It is found that (i) as the disk moves toward the rotating wall, its motion is perpendicular to the wall, and (ii) the measured velocity is in good agreement with compared with the theoretical one.
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