炭/炭复合材料的结构对磁电阻----位向曲线形状的影响

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 2400 and 2800℃,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.