초록 ▼

An inert gas stream carries crystalline or amorphous phase particles which are blown at a metal melt puddle from the exterior of a crucible nozzle facing a contact surface of a continuously moving chill body and spaced slightly therefrom through which is forced a stream of molten metal. This effects

An inert gas stream carries crystalline or amorphous phase particles which are blown at a metal melt puddle from the exterior of a crucible nozzle facing a contact surface of a continuously moving chill body and spaced slightly therefrom through which is forced a stream of molten metal. This effects homogeneous distribution of a high volume fraction of second phase particles momentarily within the melt into ribbon form prior to rapid solidification during movement away from the nozzle orifice without particle clumping. The particles may be preheated to prevent particle clumping.

대표청구항 ▼

A method of forming a continuous strip of amorphous or polycrystalline metal containing embedded particulate matter, said method comprising: moving a chill body contact surface in a generally longitudinal direction at a constant predetermined velocity past the orifice of a slotted nozzle defined by

A method of forming a continuous strip of amorphous or polycrystalline metal containing embedded particulate matter, said method comprising: moving a chill body contact surface in a generally longitudinal direction at a constant predetermined velocity past the orifice of a slotted nozzle defined by a pair of generally parallel lips located proximate to said surface with a narrow gap therebetween and with said surface orifice generally perpendicular to the direction of movement of the surface of the chill body, and forcing a stream of molten base metal through said nozzle orifice into contact with the surface of the moving chill body to form a melt puddle therebetween and to permit the metal to solidify thereon during movement away from the nozzle orifice to form a continuous metal strip, the improvement comprising: blowing second phase particles into the melt puddle from the exterior of said nozzle just prior to solidification on the chill body to effect a homogeneous distribution of high volume fractions of second phase particles within the strip with minimal contact time between the molten base metal and the second phase particles prior to solidification thereof; whereby, said particulate matter is distributed spatially homogeneously in the ribbon, eliminating possible adverse chemical reactions between the particulate matter and said base metal, or melting of the particulate matter within the base metal prior to solidification thereof.