A composite structure forming apparatus adapted to ejecting and causing an
aerosol generated by scattering brittle material fine particles in a gas
to collide with a substrate at high speed to form a structure made of the
brittle material. The apparatus includes an aerosol generator for
generating the aerosol, a nozzle for ejecting the aerosol, a shredder for
shredding the brittle particles cohering in the aerosol and preventing
cohesion of the brittle material fine particles, and a classifier for
classifying the brittle material fine particles in the aerosol. The
apparatus also includes a pretreatment device for creating internal
strain in the brittle material fine particles, and a position control
device for controlling the position of the nozzle relative to the
substrate. The apparatus further includes a container having a sieve and
a vibration device, and one or more of these components may be associated
with the aerosol generator.