Abstract
In our previous study, a novel Al-L12-type Al2.7Fe0.3Ti refiner was fabricated by spark plasma sintering (SPS) and its refining performance was studied. It is found that L12-type Al2.7Fe0.3Ti particles can be favorable heterogeneous nucleation sites for Al casts, since the lattice matching between Al2.7Fe0.3Ti and Al is good. If the volume fraction of Al2.7Fe0.3Ti heterogeneous nucleation site particles in the refiner is increased, the same amount of heterogeneous nucleation site particles can be added even if the addition amount of the grain refiner is decreased. Therefore, it can contribute to the reduction of the cost of the refiners. In this paper, Al-Al2.7Fe0.3Ti refiners with a high volume fraction of Al2.7Fe0.3Ti heterogeneous nucleation site particles are fabricated by SPS and the effect on refining performance is investigated.
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