Decomposition of Al2.7Fe0.3Ti in heated Al–Al2.7Fe0.3Ti refiner fabricated by spark plasma sintering and its refining performance

Abstract In our previous study, a novel Al-L1 2 -type Al 2.7 Fe 0.3 Ti refiner was fabricated by spark plasma sintering (SPS) and its refining performance was studied. It was found that L1 2 -type Al 2.7 Fe 0.3 Ti particles can be favorable heterogeneous nucleation sites for Al casts, since the lattice matching between Al 2.7 Fe 0.3 Ti and Al is good. It was also found that the thermal stability of heterogeneous nucleation sites affects the grain-refining performance. In this study, the decomposition phenomena of the Al 2.7 Fe 0.3 Ti phase in a refiner are studied by heating an Al–Al 2.7 Fe 0.3 Ti refiner fabricated by SPS. In addition, the refining performance of a heated Al–Al 2.7 Fe 0.3 Ti refiner is investigated.