EROSION AND THERMAL-DESORPTION CHARACTERISTICS OF 1D-CF B4C COMPOSITE/

Erosion and thermal desorption characteristics under 3 keV D-3(+) irra diation were investigated for 1D-carbon fiber (CF)/B4C composites (30 to 80 CF vol%), at surface cut normal to the CF axis. Chemical sputter ing rate of ID-CF/B4C sintered at 2100 degrees C was lower at the CF s ections than that of pure graphite, due to solid solution of boron int o the CF core. On the other hand, in the case of those at below 1800 d egrees C, suppression of chemical sputtering was not observed at the c enter part of the CF sections. From TDS results, it is considered that the boron diffusion depths into CF do not depend on the B4C volume fr action, but on the sintering temperature.