Fig. 13. Fracture morphology of the water-soluble cores. (a) water-soluble core without sintering; (b) a single sand particle coated with K2CO3 and KCl; (c) water-soluble core sintered at 700 °C for 1 h; (d) water-soluble core sintered at 750 °C for 1 h; (e) water-soluble core of (c) placed in the RH of 85-90% for 24 h; (f) water-soluble core of (e) placed in the RH of 85-90% for 24 h.

Published at 882 × 991 in Development of Water-Soluble Composite Salt Sand Cores Made by a Hot-Pressed Sintering Process

Fig. 13. Fracture morphology of the water-soluble cores. (a) water-soluble core without sintering; (b) a single sand particle coated with K2CO3 and KCl; (c) water-soluble core sintered at 700 °C for 1 h; (d) water-soluble core sintered at 750 °C for 1 h; (e) water-soluble core of (c) placed in the RH of 85-90% for 24 h; (f) water-soluble core of (e) placed in the RH of 85-90% for 24 h.

Fig. 13. Fracture morphology of the water-soluble cores. (a) water-soluble core without sintering; (b) a single sand particle coated with K2CO3 and KCl; (c) water-soluble core sintered at 700 °C for 1 h; (d) water-soluble core sintered at 750 °C for 1 h; (e) water-soluble core of (c) placed in the RH of 85-90% for 24 h; (f) water-soluble core of (e) placed in the RH of 85-90% for 24 h.

Fig. 13. Fracture morphology of the water-soluble cores. (a) water-soluble core without sintering; (b) a single sand particle coated with K2CO3 and KCl; (c) water-soluble core sintered at 700 °C for 1 h; (d) water-soluble core sintered at 750 °C for 1 h; (e) water-soluble core of (c) placed in the RH of 85-90% for 24 h; (f) water-soluble core of (e) placed in the RH of 85-90% for 24 h.