抄録
It is known that the equilibrium shape of Al3Ti particles in Al_3Ti grain refiner is platelet, and the aspect ratio of Al_3Ti platelet in Al-5mass%Ti alloy grain refiner is reported to be 13. Therefore, average disregistry value for the platelet shaped Al_3Ti can be estimated to be 4.78%. On the other hand, the average disregistry value for the granular shaped Al_3Ti is 2.99%, which is much smaller than that for platelet shaped Al_3Ti. In this study, Al/granular shaped Ti particles sintered compact is fabricated by spark plasma sintering (SPS) method. Since granular shaped Al_3Ti particles can formed by the reaction, 3A1 + Ti -> Al_3Ti, the fabricated Al/granular shaped Ti particles sintered compact can act as a better grain refiner.
