Published 02/07/2025 at 768 × 420 in Fig. 4. Microstructures of gravity cast specimen using fusible core added 60 wt% ceramic powder. Fig. 4. Microstructures of gravity cast specimen using fusible core added 60 wt% ceramic powder. Fig. 4. Microstructures of gravity cast specimen using fusible core added 60 wt% ceramic powder.