Particulate Reinforced Aluminum Matrix Composites Obtained By Indirect Squeeze-Casting 91A115
Indirect squeeze casting technology is one of the most
attractive fabrication techniques of near net shape components
constituted by aluminum matrix composite (AMC) materials.
AMCs reinforced with both continuous and discontinuous ceramic
elements have been mainly produced by infiltration of porous
preforms. Nevertheless, a further promising production route
offered by this technique is given by the possibility to employ
ingots of pre-reinforced aluminum alloys containing ceramic
particles (silicon carbide or alumina); ingots are remelted and,
under suitable operative conditions, high quality composite
castings of simple and complex shape are produced by squeeze
The present paper describes the results of an extensive
experimental work carried out by Alures-Centro Tecnico Porcessi on
a pilot plant scale employing a vertical squeeze casting machine
with a clamping force of 315 tons. The conditions of use of the
reinforced material in the melt state and the main casting process
parameters are discussed; experimental results of both mechanical
and physico/chemical characterization of the staff composite
material (A356 aluminum matrix alloy reinforced with SiC particles)
produced by this technique are presented.
Particulate reinforced squeeze cast components produced by this
route have wide possibilities of employment in several industrial
fields: the most relevant applications, and in particular those in
the automotive sector, are discussed in the paper.
Some examples of prototipal components produced by Alures,
employing the described materials and technology, are shown.
F. Pinna, E. Di Russo
Materials Innovation and Their Applications in the Transportation Industry