Influence of texture of C/C composites on the shape of magnetoresistance-orientation angles curves

The magnetoresistance(MR)-orientation angle(φ) relationship of four C/C composites,each with a different texture and graphitized at heat treatment temperature(HTT) between(2 400) and(2 800 ℃),were investigated.The shape of the MR-φ curve varied with the texture of the C/C composite materials.However,this shape is not affected by HTT,test temperature and the magnetic field intensity.Fourier analysis was applied to each MR-φ curve,indicating that the shape of the MR-φ curve is related to the direction of the fibers in the C/C composites.