UBC Theses and Dissertations

UBC Theses Logo

UBC Theses and Dissertations

A study of the manufacturing method and related mechanical properties of SiC reinforced aluminum Wiskel, J. Barry


A study involving manufacturing and tensile testing was conducted to elucidate the mechanical properties of a SiC fibre reinforced aluminum. Areas analyzed included production methods, failure mechanisms, tensile behaviour and interfacial bonding. A well dispersed fibre distribution in the as cast composite was difficult to obtain. This arises from the high degree of intermingling of fibres in the as-received tows. The poor distribution can lead to incomplete fibre utilization and increase composite susceptibility to delamination damage. The strength of the composites tested were below that expected from a rule of mixtures (ROM) value. Fibre damage incurred during manufacturing and by the formation of aluminum carbide on the fibre surface are possible causes for this anomaly. Also, fibre/(matrix plastic deformation) interaction can lead to premature composite failure especially at the low volume fractions of fibres being analyzed. On a microscopic level good bonding between the fibre and matrix was observed. This adhesion was attributed to the formation of aluminum carbide at the fibre/matrix interface. Synergistic strengthening of the matrix was observed for several tensile samples. This phenomena may be attributed to fibre distribution altering the aluminum matrix deformation behaviour.

Item Media

Item Citations and Data


For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.