Abstract
In our previous studies, it was found that Al-Al_3Ti FGM fabricated by a centrifugal method contains anisotropically oriented Al_3Ti platelets. The orientation of Al_3Ti platelets is found to be gradually distributed in the FGM as well as the mean volume fraction of platelets. Since the anisotropy of orientation of the reinforcement is likely to affect greatly the mechanical and physical properties of the composites, detailed knowledge of orientation distribution of the particles in FGMs is a for requirement predicting the mechanical properties of the FGMs. In this study, a corundum/aluminum-platelet is used as a model system to investigate the orientation effects in the platelet-reinforced' FGM fabricated by the centrifugal. Every aluminum-platelets are bared from the corundum matrix, and three-dimensional orientation for the platelets is directly observed. Based on experimental results, the origin of the orientation of platelets in the FGMs fabricated by the centrifugal methods will be discussed.
