LOW PRESSURE CASTING OF CARBON-FIBRE-REINFORCED ALUMINIUM COMPOSITES

Liquid metal infiltration statics and kinetics are analysised.Experiments have been made to measure its permeability.Infiltration processing and quality of C/A1 composites are discussed under four conditions.It is pointed out that wetting is not an essential condition in fabricating the composites at low pressure.High-quality composites can also be fabricated at low pressure by controlling the fibre distribution regardless of non-wetting.Finally.the non-uniform fibre-distribution infiltration technique is used to cast high-quality composites.High-tensile-strength C/A1 composites are fabricated successfully at the low pressure of 0.7MPa.