Mechanical Strength of SiC Fibers

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Student Presentation

Presentation Date


Faculty Sponsor

Darryl Butt


Silicon carbide (SiC) coated carbon fibers, with diameters on the order of 1/10th those of a human hair, are being developed for energy and defense applications due to their low density, high elastic modulus, and excellent high temperature mechanical properties. In order to determine the effects of processing on mechanical properties, the tensile properties were measured on both individual fibers and fiber bundles. Fiber diameters were measured by a laser diffraction method. The thickness and composition of the SiC conversion layer were evaluated by electron microscopy and energy dispersive spectroscopy. The statistics of fracture were analyzed and correlated with conversion layer thickness.

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