  Planar flow casting (PFC) is a method that can be used to make thin, long,
and wide metallic alloy foils by extruding molten liquid through a thin and
wide nozzle and immediately quenching on a moving roller. The quenching rates
are high enough that amorphous metallic glasses may be formed which have many
desirable properties for a wide variety of applications. This paper reviews how
PFC processes were developed, examines the typical operability range of PFC,
and reviews the defects that commonly form. The geometrical similarities
between PFC and slot coating process are apparent, and this paper highlights
differences between the operability ranges of both processes.
