11:00 〜 11:15
[3L05] Effect of Er2O3 interphase on SiC fiber reinforced W composites
キーワード：composite, diffusion barrier, mechanical properties, SiC fiber, tungsten, Er2O3
To ameliorate the brittleness of W, SiC fiber was selected as reinforcement to improve its toughness, because of high strength at high temperature, and the close coefficients of thermal expansion between W (4.6×10-6 /°C, RT) and SiC (4.7×10-6 /°C, RT). And multi-dipped Er2O3 coated on fiber or powders dispersed in fiber bundle as diffusion barrier to protect the SiC fiber from the reactions with W. 0.08 mm W foils were used as matrix in this work. The results show the reaction zone still can be observed on the dipped coated fiber reinforced composite, but the strain-stress curve show obvious pseudo-ductility. While regarding the powder dispersed composite, almost no reaction zone can be observed, but the pseudo ductile behavior is not obvious. Details about stress-strain curve and microstructure will be reported.