Study of piezoresistance effect in carbon fibers Original Research Article

Piezoresistance effect in different carbon and graphite fibers was examined. PAN-based carbon fibers laboratory prepared at various temperatures and pitch-based carbon and graphite fibers have been analyzed. Graphite fibers were intercalated with metal chlorides. The resistance changes during tensile loading were measured. The piezoresistance coefficient and coefficient of strain sensitivity were determined. Dependent on the type of fiber and temperature treatment, negative or positive effect of piezoresistance was observed. The resistance behavior of fibers during stretching was considered as geometrical changes and electrical conduction changes in graphite structure. The relationship between the structure parameters and piezoresistance effect for all fibers has been studied.