A method of forming high quality metallurgical bonds in a composite casting is provided. The bonding technology includes the step of introducing a liquid material to contact the solid components placed in a mold cavity, applying an external field to generate stifling near the solid/liquid interface to wash off bubbles and oxide particles that prevent the liquid material from reacting to the solid component, and causing progressive solidification from the surfaces of the solid component to the liquid to drive away bubbles in the mushy zone near the bonding region. High quality metallurgical bonds are formed within the composite casting after the liquid solidifies. The resultant large composite casting has minimal defects, such as pores and oxides, at the interfaces between the solidified material and the solid objects.